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Lanz, O., R. McLaughlin, S. Elder, S. Werre, and D. Filipowicz. "A biomechanical comparison of 3.5 locking compression plate fixation to 3.5 limited contact dynamic compression plate fixation in a canine cadaveric distal humeral metaphyseal gap model." Veterinary and Comparative Orthopaedics and Traumatology 22, no. 04 (2009): 1–8. http://dx.doi.org/10.3415/vcot-08-05-0042.
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Summary3.5 locking compression plate (LCP) fixation was compared to 3.5 limited contact dynamic compression plate (LC-DCP) fixation in a canine cadaveric, distal humeral metaphyseal gap model. Thirty paired humeri from adult, large breed dogs were separated into equal groups based on testing: static compression, cyclic compression, and cyclic torsion. Humeral constructs stabilized with LCP were significantly stiffer than those plated with LCDCP when loaded in static axial compression (P = 0.0004). When cyclically loaded in axial compression, the LCP constructs were significantly less stiff than the LC-DCP constructs (P = 0.0029). Constructs plated with LCP were significantly less resistant to torsion over 500 cycles than those plated with LC-DCP (P<0.0001). The increased stiffness of LCP constructs in monotonic loading compared to constructs stabilised with non-locking plates may be attributed to the stability afforded by the plate-screw interface of locking plates. The LCP constructs demonstrated less stiffness in dynamic testing in this model, likely due to plate-bone offset secondary to non-anatomic contouring and occasional incomplete seating of the locking screws when using the torque-limiting screw driver. Resolution of these aspects of LCP application may help improve the stiffness of fixation in fractures modeled by the experimental set-up of this investigation.
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Manos, J. M., A. S. Orlansky, R. J. Todhunter, E. J. Trotter, M. C. H. van der Meulen, and A. Z. Aguila. "In vitro biomechanical comparison of limited contact dynamic compression plate and locking compression plate." Veterinary and Comparative Orthopaedics and Traumatology 18, no. 04 (2005): 220–26. http://dx.doi.org/10.1055/s-0038-1632958.
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SummaryThe locking compression plate (LCP) supports biological osteosynthesis by functioning as an internal fixator, rather than as a full or limited contact bone plate which must be adequately contoured and affixed directly to the bone for stable internal fixation of the fracture. In order to help justify the use of the LCP in our veterinary patients, in vitro biomechanical testing was performed comparing the LCP to the conventional limited contact dynamic compression plate (LC-DCP) in canine femurs. We hypothesized that the LCP construct would be at least as stiff under bending and torsional loads as the LC-DCP. The LCP and LC-DCP were applied over a 20-mm osteotomy gap to contralateral bones within each pair of 14 femora. Non-destructive four-point bending and torsion, and cyclical testing in torsion were performed. The constructs were then loaded to failure in torsion. In medial-lateral and lateral-medial structural bending, significant differences were not found between the LCP and LC-DCP, however, at the gap, the LCP construct was stiffer than the LC-DCP in lateral-medial bending. Significant differences in behaviour over time were not noted between the plate designs during cyclical testing. When loading the constructs to failure in internal rotation, the LC-DCP failed at a significantly lower twist angle (P = .0024) than the LCP. Based on the similar performance with loading, the locking compression plate is a good alternative implant for unstable diaphyseal femoral fracture repair in dogs.
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Glyde, M., G. Hosgood, R. Day, and T. Pearson. "The effect of intramedullary pin size and monocortical screw configuration on locking compression plate-rod constructs in an in vitro fracture gap model." Veterinary and Comparative Orthopaedics and Traumatology 28, no. 02 (2015): 95–103. http://dx.doi.org/10.3415/vcot-14-06-0093.
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SummaryObjective: To investigate the effect of intramedullary pin size in combination with various monocortical screw configurations on locking compression plate-rod constructs.Methods: A synthetic bone model with a 40 mm fracture gap was used. Locking compression plates with monocortical locking screws were tested with no pin (LCP-Mono) and intramedullary pins of 20% (LCPR-20), 30% (LCPR-30) and 40% (LCPR-40) of intramedullary diameter. Locking compression plates with bicortical screws (LCP-Bi) were also tested. Screw configurations with two or three screws per fragment modelled long (8-hole), intermediate (6-hole), and short (4-hole) plate working lengths. Responses to axial compression, biplanar four-point bending and axial load-to-failure were recorded.Results: LCP-Bi were not significantly different from LCP-Mono control for any of the outcome variables. In bending, LCPR-20 were not significantly different from LCP-Bi and LCP-Mono. The LCPR-30 were stiffer than LCPR-20 and the controls. The LCPR-40 constructs were stiffer than all other constructs. The addition of an intramedullary pin of any size provided a significant increase in axial stiffness and load to failure. This effect was incremental with increasing intramedullary pin diameter. As plate working length decreased there was a significant increase in stiffness across all constructs.Clinical significance: A pin of any size increases resistance to axial loads whereas a pin of at least 30% intramedullary diameter is required to increase bending stiffness. Short plate working lengths provide maximum stiffness. However, the overwhelming effect of intramedullary pin size obviates the effect of changing working length on construct stiffness.
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SHASHIKANT, CHIMKODE, D. DILIPKUMAR, and MANJUNATH PATIL. "Evaluation of polyaxial locking plate system and locking compression plate for tibial fracture repair in goats." Indian Journal of Animal Sciences 94, no. 3 (2024): 220–25. http://dx.doi.org/10.56093/ijans.v94i3.147187.
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The present study was conducted to evaluate polyaxial locking plate system (PAX) and locking compression plate (LCP) in twelve tibial fracture of goats. The cases were divided into two groups, viz. group I and group II having six goats in each. Group I and II treated with Polyaxial locking plate system (PAX) and Locking compression plate (LCP), respectively. The two techniques were evaluated on the basis of clinical and radiological changes observed on pre-operative day and at post-operative days 0, 15, 30 and 60. All the animals showed slight to moderate weight bearing from 7th to 15th post-operative day and moderate to good weight bearing by 30th post operative day. Good to excellent weight bearing was achieved by 60th post-operative day. Functional weight bearing was observed in all the groups by day 60. Radiological evaluation revealed that fracture healing in all the groups was through primary callus formation. Initiation of periosteal callus was noticed on day 15 in all the groups. Apparent bridging of the fracture site was noticed in all the groups on day 30. Cortico-medullary union was established on day 60. The complete union and initiation of remodelling of fracture was observed to be earlier in group II, compared to group I. Both Polyaxial Locking plate system and locking compression plates had sufficient strength to provide stability at fracture site but slightly better weight bearing without any complication was observed in animals treated with LCP.
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Mahajan, Neetin P., Mrugank A. Narvekar, Lalkar L. Gadod, and G. S. Prasanna Kumar. "Comminuted olecranon fractures: locking compression plate fixation verses conventional plate fixation." International Journal of Research in Orthopaedics 7, no. 5 (2021): 1001. http://dx.doi.org/10.18203/issn.2455-4510.intjresorthop20213382.
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<p class="abstract"><strong>Background:</strong> A variable consensus exists on the optimal management strategies for olecranon fractures. Though the mechanical properties of the conventional plates and the locking plates used show no difference, pre-contoured locking plates provide a significant advantage over non-locking plates in unstable fractures. The aim of the study was to compare clinical and radiological outcomes in the management of the comminute olecranon fractures by anatomically pre-contoured locking compression plates and the conventional plates.</p><p class="abstract"><strong>Methods:</strong> The present study was a prospective study of 50 patients with comminuted olecranon fracture, with 25 patients each randomized into two groups, those that underwent fixation of the fracture using a pre-contoured locking compression plate (group LCP) and those fixed using a conventional plate (3.5 mm reconstruction plate) (group CP). Patients were followed up to 1 year with functional outcome assessed at each follow-up with Mayo elbow performance score.<strong></strong></p><p class="abstract"><strong>Results:</strong> The mean MEPS (LCP vs CP) at 1.5 (47 vs. 43.4) and 3 (67.4 vs 61.6) months follow up showed a statistically significant difference between the two groups, but the difference was not significant at 6 (86.4 vs 85.6) and 12 (88.4 vs 87) months. The time to union (4.3 months vs 5.0 months) was not significantly different between the groups. There were 11 complications in group LCP and 12 complications in group CP.</p><p class="abstract"><strong>Conclusions:</strong> In the present study, we suggest that the use of a pre-contoured locking compression plate provides better outcomes at earlier periods as compared to the conventional plate; thus, returning the patient to normal function at the earliest.</p>
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Moens, Noel, John Runciman, Tom Gibson, and Gwyneth Watrous. "Biomechanical Properties of the 1.5 mm Locking Compression Plate: Comparison with the 1.5 and 2.0 mm Straight Plates in Compression and Torsion." Veterinary and Comparative Orthopaedics and Traumatology 31, no. 06 (2018): 438–44. http://dx.doi.org/10.1055/s-0038-1668084.
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Objectives The purpose was to compare the biomechanical properties of a 1.5 mm locking compression plate (1.5 LCP) to the 1.5 mm straight plate (1.5 P), 1.5 mm straight plate stacked (1.5 PSt) and 2.0 mm straight plate (2.0 P) in compression and torsion. We hypothesized that biomechanical properties of the 1.5 LCP would be equivalent to properties of the 1.5 P and would represent an alternative for the treatment of radial fractures in miniature breed dogs in which those plates would be used. Materials and Methods A 1 mm fracture gap model was created with a bone surrogate stabilized with a six-hole plate. Sixteen constructs were built for each of the four plate configurations. Eight constructs from each group were tested in compression to failure and eight constructs were tested in torsion to failure. Results In compression testing, the 1.5 LCP was stiffer than the 1.5 P, and had similar stiffness than the 1.5 PSt and the 2.0 P. The load at yield of the 1.5 LCP was slightly lower than the 1.5 P. In torsion, the 1.5 LCP and 1.5 P had similar stiffness, but 1.5 LCP was slightly stronger than 1.5 P. The 1.5 PSt and 2.0 P were overall superior to the 1.5 LCP but only marginally so for the 1.5 PSt. Clinical Relevance The 1.5 LCP can be considered biomechanically equivalent to the 1.5 P under the present experimental conditions. The use of the 1.5 LCP can be considered as an option for radial fracture repair in dogs in which a 1.5 P would have otherwise been used. The use of a locking plate to improve overall success rate, in these fractures, remains to be confirmed clinically.
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Bird, Guy, Mark Glyde, Giselle Hosgood, Alex Hayes, and Rob Day. "Effect of Plate Type and Working Length on a Synthetic Compressed Juxta-Articular Fracture Model." VCOT Open 03, no. 02 (2020): e119-e128. http://dx.doi.org/10.1055/s-0040-1716722.
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Abstract Objective This investigation compared the biomechanical properties of a 2.0 mm locking compression notched head T-plate (NHTP) and 2.0 mm straight locking compression plate (LCP), in a compressed, short, juxta-articular fragment fracture model. Methods Two different screw configurations were compared for the NHTP and LCP, modelling short (configuration 1) and long working length (configuration 2). Constructs were tested in compression, perpendicular and tension four-point bending and torsion. Plate surface strain was measured at 12 regions of interest using three-dimensional digital image correlation. Stiffness and strain were compared. Results The LCP was stiffer than the NHTP in all three planes of bending (p < 0.05). The NHTP was stiffer than the LCP in torsion (p < 0.05). The NHTP had greater strain than the LCP during compression bending and torsion (p < 0.0005). The short working length NHTP was stiffer in all three planes of bending and in torsion (p < 0.05) than the longer working length. The short working length LCP was stiffer in compression bending and in torsion (p < 0.05) than the longer working length. The long working length showed greater strain than the short working length at multiple regions of interest. Conclusion In this experimental model of a compressed transverse fracture with a juxta-articular 9 mm fragment, a 2.0 mm LCP with two hybrid screws in the short fragment was stiffer than a 2.0 mm NHTP with three locking screws in the short fragment in three planes of bending but not torsion. Extending the working length of each construct reduced construct stiffness and increased plate strain.
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Corr, S. A., J. Grierson, G. Arthurs, and N. Woodbridge. "A retrospective study of tibial plateau translation following tibial plateau levelling osteotomy stabilisation using three different plate types." Veterinary and Comparative Orthopaedics and Traumatology 24, no. 06 (2011): 445–49. http://dx.doi.org/10.3415/vcot-10-06-0090.
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SummaryObjective:To retrospectively evaluate mediolateral translation of the proximal tibial segment (tibial plateau) after tibial plateau levelling osteotomy (TPLO), stabilised with three types of plate.Method: Pre- and postoperative radiographs of 79 dogs that had TPLO surgery using three different types of plates were reviewed. Two plate types incorporated non-locking screws: Slocum (22 cases) and Orthomed Delta (33 cases) plates. The third plate type incorporated locking screws: Synthes TPLO Locking Compression Plate (LCP) (24 cases). The radio-graphs were viewed by three Diplomate surgeons who were blinded to the type of implant used. Medial or lateral translation of the proximal tibial plateau relative to the tibial diaphysis was assessed and measured at the lateral tibial cortex at the osteotomy site.Results: Mean lateral translation of the tibial plateau was significantly greater when using the Synthes TPLO LCP with locking screws (+2.1 mm) compared to the non-locking Slocum (+0.4 mm) or Orthomed Delta (0.0 mm) plates.Clinical significance: The use of the Synthes TPLO LCP will maintain a malalignment of the tibial plateau. Accurate alignment of the tibial plateau must be ensured prior to application of the Synthes TPLO LCP.
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Suaimi, Muhammad Khairul Asyraf, Amir Mustakim Ab Rashid, Ahmad Kafrawi Nasution, Gan Hong Seng, Mohammed Rafiq Abdul Kadir, and Muhammad Hanif Ramlee. "BIOMECHANICAL EVALUATION OF LOCKING COMPRESSION PLATE (LCP) VERSUS DYNAMIC COMPRESSION PLATE (DCP): A FINITE ELEMENT ANALYSIS." Jurnal Teknologi 84, no. 3 (2022): 125–31. http://dx.doi.org/10.11113/jurnalteknologi.v84.16687.
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Internal fixators are commonly used to treat long bone fractures, its aim is to provide interfragmentary compression, allow limited micromotion and provide stability to the bone for ambulation. However, complications such as non-unions, malunions and broken implant, can occur due to the complexity of mechanical force acting on the bone-plate models. Therefore, this study is proposed to investigate the biomechanical characterization of plate design on a tibia bone using finite element method. Two different designs; 1) locking compression plate (LCP) and dynamic compression plate (DCP) were simulated by using Marc.Mentat software. From the findings, the LCP have lower peak von Mises stress (VMS) distribution of 160 MPa compared to DCP with VMS value of 232 MPa. Surprisingly, the VMS of DCP plate system have exceed the yield strength of stainless steel (215 MPa) which translate to higher risk of failures. Moreover, the DCP plate system shows 50% lower stability compared to the LCP plate system, which has the peak displacement at 0.98 mm compared to the DCP bone at 1.53 mm. In conclusion, the LCP provides better stability and stress distribution up to 45% differences as compared to the DCP.
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Suaimi, Muhammad Khairul Asyraf, Amir Mustakim Ab Rashid, Ahmad Kafrawi Nasution, Gan Hong Seng, Mohammed Rafiq Abdul Kadir, and Muhammad Hanif Ramlee. "BIOMECHANICAL EVALUATION OF LOCKING COMPRESSION PLATE (LCP) VERSUS DYNAMIC COMPRESSION PLATE (DCP): A FINITE ELEMENT ANALYSIS." Jurnal Teknologi 84, no. 3 (2022): 125–31. http://dx.doi.org/10.11113/jurnalteknologi.v84.16687.
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Internal fixators are commonly used to treat long bone fractures, its aim is to provide interfragmentary compression, allow limited micromotion and provide stability to the bone for ambulation. However, complications such as non-unions, malunions and broken implant, can occur due to the complexity of mechanical force acting on the bone-plate models. Therefore, this study is proposed to investigate the biomechanical characterization of plate design on a tibia bone using finite element method. Two different designs; 1) locking compression plate (LCP) and dynamic compression plate (DCP) were simulated by using Marc.Mentat software. From the findings, the LCP have lower peak von Mises stress (VMS) distribution of 160 MPa compared to DCP with VMS value of 232 MPa. Surprisingly, the VMS of DCP plate system have exceed the yield strength of stainless steel (215 MPa) which translate to higher risk of failures. Moreover, the DCP plate system shows 50% lower stability compared to the LCP plate system, which has the peak displacement at 0.98 mm compared to the DCP bone at 1.53 mm. In conclusion, the LCP provides better stability and stress distribution up to 45% differences as compared to the DCP.
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Wagner, M., and R. Frigg. "Locking Compression Plate (LCP): Ein neuer AO-Standard." OP-Journal 16, no. 3 (2000): 238–43. http://dx.doi.org/10.1055/s-2007-977512.
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Hara, Koichi, Koshi Furusho, and Naotoshi Ninomiya. "Cases with Difficulty in Removal of Locking Compression Plate (LCP)." Orthopedics & Traumatology 61, no. 3 (2012): 424–28. http://dx.doi.org/10.5035/nishiseisai.61.424.
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Zhou, Jiang-Jun, Min Zhao, Da Liu, Hai-Ying Liu, and Cheng-Fei Du. "Biomechanical Property of a Newly Designed Assembly Locking Compression Plate: Three-Dimensional Finite Element Analysis." Journal of Healthcare Engineering 2017 (2017): 1–10. http://dx.doi.org/10.1155/2017/8590251.
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In this study, we developed and validated a refined three-dimensional finite element model of middle femoral comminuted fracture to compare the biomechanical stability after two kinds of plate fixation: a newly designed assembly locking compression plate (NALCP) and a locking compression plate (LCP). CT data of a male volunteer was converted to middle femoral comminuted fracture finite element analysis model. The fracture was fixated by NALCP and LCP. Stress distributions were observed. Under slow walking load and torsion load, the stress distribution tendency of the two plates was roughly uniform. The anterolateral femur was the tension stress area, and the bone block shifted toward the anterolateral femur. Maximum stress was found on the lateral border of the number 5 countersink of the plate. Under a slow walking load, the NALCP maximum stress was 2.160e+03 MPa and the LCP was 8.561e+02 MPa. Under torsion load, the NALCP maximum stress was 2.260e+03 MPa and the LCP was 6.813e+02 MPa. Based on those results of finite element analysis, the NALCP can provide adequate mechanical stability for comminuted fractures, which would help fixate the bone block and promote bone healing.
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Jassam, Bashar Saade, Hassanein Hadi Alwan, and Ali Zuhair Olewi. "Anatomical Locking Compression Plate versus Dynamic Compression Plate in the Treatment of Displaced Midshaft Clavicle Fractures in Adults." European Journal of Medical and Health Research 3, no. 4 (2025): 21–28. https://doi.org/10.59324/ejmhr.2025.3(4).04.
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Background: Midshaft fractures account for between 69 and 82 per cent of all cases of clavicle fracture, which are among the most frequent orthopedic injuries. Displaced midshaft clavicular fractures are traditionally managed non-operatively. However, conservative treatment has been shown to result in higher rates of nonunion, malunion and poor functional outcomes. Consequently, there has been a shift toward surgical fixation to enhance union rates and improve shoulder function. Among surgical options, plate fixation is widely favored for its reliability, though the choice between anatomical locking compression plates (LCP) and dynamic compression plates (DCP) remains debated. Aim: The aim is to compare the short-term clinical outcomes of using anatomical LCP and DCP to treat displaced midshaft clavicle fractures in adults. Methods: A prospective randomized clinical trial was conducted at Al-Imamein Al-Kadhimaein Medical City in Baghdad, Iraq, from January 2021 to January 2022. Twenty adult patients with unilateral displaced midshaft clavicle fractures were randomly assigned to two groups: Group A (LCP) and Group B (DCP). Results: The mean age was 26.8 ± 3.9 years, with males comprising 65% of the sample. No significant difference was observed in wound infection rates between groups (P = 0.839). However, symptomatic hardware prominence was significantly higher in the DCP group (P = 0.039). The LCP group demonstrated a significantly shorter time to union, though both groups achieved a 100% union rate. Quick DASH scores favored the LCP group at both 3 and 6 months, reflecting better functional recovery and reduced pain. Conclusion: LCP offers superior outcomes in terms of union time, complication rates, and functional recovery compared to DCP in displaced midshaft clavicle fractures.
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Wall, Bryce, Jeffrey B. Stambough, Steven M. Cherney, and Simon C. Mears. "Use of the Locking Attachment Plate for Internal Fixation of Periprosthetic Femur Fractures." Geriatric Orthopaedic Surgery & Rehabilitation 13 (January 2022): 215145932211004. http://dx.doi.org/10.1177/21514593221100417.
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Introduction The locking attachment plate (LAP) can be added to a locking compression plate (LCP) to allow the fixation of locking screws bicortically around a femoral implant. We aimed to examine surgical and fracture characteristics associated with healing for periprosthetic femur fractures (PPFFx) treated with constructs employing LAP fixation. We hypothesize that the addition of an LAP provides stable peri-implant fixation. Materials &Methods We retrospectively reviewed a consecutive series of 28 PPFFx surgically treated with LCP-LAP constructs by 4 surgeons from 2015-2020. Fractures were classified and grouped using the Vancouver Classification System and included 12 B1, 2 B2, 11 C fractures, and 3 fractures around other stemmed implants. Primary outcome measures included hardware failure such as screw pullout, broken screws, and plate fracture. Clinical complications including infection, non-union, malunion, and reoperation were recorded. Results No LAP failures, screw pullout, or broken screws were observed. Two fractured plates (7.1%) occurred in patients with Vancouver C fracture types. Overall complication rate was 17.9% and included 3 non-unions, 1 deep infection, and 1 implant loosening with painful hardware, each requiring reoperation. Differences were observed between unions and nonunions for total number of screws (12.4 vs 14.7, P = .005) and number of locking screws used (8.04 vs 11.3, P = .03). Conclusion The LAP provides adequate fixation and low failure rates where fixation is required around a well-fixed stem. When failures occur, it is from plate breakage and not due to failure of fixation at the area of plate-stem overlap.
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Sembenelli, G., G. V. Souza, M. C. N. Wittmaack, et al. "Biomechanical comparison of a modified TPLO plate, a locking compression plate, and plate-rod constructs applied medially in a proximal gap model in canine synthetic tibias." Arquivo Brasileiro de Medicina Veterinária e Zootecnia 74, no. 5 (2022): 948–53. http://dx.doi.org/10.1590/1678-4162-12557.
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ABSTRACT The aim of this study was to develop a modified tibial plateau leveling osteotomy (TPLO) plate and to compare its biomechanical properties with a locking compression plate (LCP) and plate-rod constructs for the stabilization of experimentally induced gap fractures in canine synthetic tibias. The tibial models were assigned to either repair with a modified TPLO plate (Group 1), locking compression plate construct (Group 2), or plate-rod construct (Group 3). The specimens were loaded to failure in axial compression, three-point mediolateral and craniocaudal bending. There was no statistical difference between the three groups regarding stiffness (N/mm) and deformation (mm) in axial compression. The modified TPLO plate achieved load to failure similar to the plate-rod construct in craniocaudal bending. There was no significant difference between groups on mediolateral bending tests regarding load to failure and deformation. Furthermore, there was no significant difference in stiffness between groups 1 and 2. In conclusion, the modified TPLO plate had similar mechanical properties to LCP and plate-rod construct in the axial compression and bending tests. Nonetheless, clinical studies with a large population of dogs are required to determine the value of this new implant in proximal tibial fracture repair.
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Kaczmarek, Jakub, Tomasz Bartkowiak, Riccarda Schuenemann, et al. "Mechanical Performance of a Polyaxial Locking Plate and the Influence of Screw Angulation in a Fracture Gap Model." Veterinary and Comparative Orthopaedics and Traumatology 33, no. 01 (2019): 036–44. http://dx.doi.org/10.1055/s-0039-1698415.
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Abstract Objective The aim of this study was to compare the locking compression plate (LCP) with polyaxial locking system (PLS) using single cycle to failure 4-point bending test and to investigate the behaviour of PLS with screws inserted mono- and polyaxially using cyclic fatigue test in two bending directions. Materials and Methods Tests were performed on bone surrogates in a fracture gap model. The 3.5 LCP and 3.5 PLS plates were tested in single cycle to failure. The 3.5 PLS plates with mono- and polyaxial screws were compared in a cyclic fatigue tests in two orthogonal directions. For both experiments, micro-computed tomography (CT) scans were performed pre- and post-testing to investigate the connections between the screw head and the plate hole. Means of forces and cycles needed to failure were statistically compared. Results The PLS plates were on average 30% weaker than LCP plates. Mode of failure was plate bending in the single cycle to failure tests, and plate breakage in the cyclic fatigue tests. Neither screw breakage nor loss of the screw–plate interface occurred. Mono- and polyaxial constructs performed similarly when loaded in the same direction. Micro-CT revealed no additional internal cracks in the plates or screws after testing. It also showed for both PLS and LCP that there was only partial contact of the screw head with the plate hole. Clinical Relevance PLS offers a durable locking system, even when the screws are placed polyaxially. The weaker bending properties of the PLS compared with LCP should be considered during preoperative planning.
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Neubauer, Th, M. Wagner, Ch Hammerbauer, Th Neubauer, M. Wagner, and Ch Hammerbauer. "System of Plates with Angular Stability (LCP) - the New AO Standard of Plate Osteosynthesis." N.N. Priorov Journal of Traumatology and Orthopedics 10, no. 3 (2003): 27–35. http://dx.doi.org/10.17816/vto200310327-35.
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Locking Compression Plate (LCP) represents the latest development of AO plates, combining the features of conventional plates and internal fixators. This is achieved by a so-called combi-hole merging the Dynamic Compression Unit (DCU) of the DCP and the threaded hole of locked plates. Therefore all kinds of conventional screws as well as threaded locking head screws (LHS) can be inserted through the plate depending on the specific local requirements. However, LCP represents not a new plate per se, but rather a plate/screw system to enrich the well known AO-plate designs with the option of interlocking. As the mechanical characteristics have not changed by adding a combi-hole the complete set of small (3,5 mm) and broad (4,5/5,0 mm) AO-plates is available. Additionally LCP-systems adapted to certain anatomic regions, like the proximal humerus and distal radius as well as Tomofix2 plates for osteotomies have been developed. We report about our first experience in clinical use of LCP. Prom April 2000 till December 2002, 310 LCP systems have been implanted in 274 patients. 303 plates (97,7%) were implanted for fixation of 285 fractures with different localization in 267 patients, including 17 pediatric fractures (5,9%), 9 periprosthetic fractures (3,2%), 5 delayed-unions (1,8%) and 4 pathologic fractures (1,4%). Seven plates (2,3%) were implanted to fix osteotomies. Of all plates 111 (35,8%) implants were fixed with locking head screws, 194 (62,6%) with both types of screws and only in 5 plates (1,6%) conventional screws were used. 73 (23,5%) of all plates were inserted using a minimal-invasive approach and 237 (76,5%) via an open procedure. Postoperative complications occurred in 14/267 patients (5,2%) exclusively treated for fractures, representing a complication rate of 5,2% in 15/285 fractures. Loosening of implants were seen in 1,4%), deep wound infection in 1,05%, osteomyelitis, refracture and postoperative hematoma in 0,7%, respectively. Secondary malalignment and problems with implant removal occurred in 1 patient (0,35%), respectively. No delayed or non-unions were observed. In LCP all options of plate osteosynthesis are included, so fixation can be adapted more accurately to the local situation and operative procedure is facilitated.
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DeTora, M., and K. Kraus. "Mechanical testing of 3.5 mm locking and non-locking bone plates." Veterinary and Comparative Orthopaedics and Traumatology 21, no. 04 (2008): 318–22. http://dx.doi.org/10.3415/vcot-07-04-0034.
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SummaryLocking plate technologies are being developed in order to provide the surgeon with advantages over previous bone plate systems (both locking and non-locking). Locking plate systems possess inherent biological advantages in fracture fixation by preserving the periosteal blood supply, serving as internal fixators. It is important to consider the strength of each orthopaedic implant as an important selection criterion while utilizing the reported advantages of locking plate systems to prevent catastrophic fracture failure. Mechanical testing of orthopaedic implants is a common method used to provide a surgeon with insight on mechanical capabilities, as well as to form a standardized method of plate comparison. The purpose of this study was to demonstrate and to quantify observed differences in the bending strength between the LCP (Limited Contact Plate), LC-DCP, 3.5 mm Broad LC-DCP (Limited Contact Dynamic Compression Plate), and SOP (String of Pearls) orthopaedic bone plates. The study design followed the ASTM standard test method for static bending properties of metallic bone plates, which is designed to measure mechanical properties of bone plates subjected to bending, the most common loading encountered in vivo. Single cycle four point bending was performed on each orthopaedic implant. The area moment of inertia, bending stiffness, bending strength, and bending structural stiffness were calculated for each implant. The results of this study demonstrated significant differences (p<0.001) in bending strength and stiffness between the four orthopaedic implants (3.5 Broad LC-DCP>SOP>LCP=LC-DCP). The 3.5 mm LCP should be expected to provide in vivo strength and stiffness similar to a comparable LC-DCP. The SOP should provide strength and stiffness that is greater than a comparable LC-DCP but less than a 3.5 mm Broad LC-DCP.
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Miramini, Saeed, Li Hai Zhang, Martin Richardson, and Priyan Mendis. "Computational Simulation of Mechanical Microenvironment of Early Stage of Bone Healing under Locking Compression Plate with Dynamic Locking Screws." Applied Mechanics and Materials 553 (May 2014): 281–86. http://dx.doi.org/10.4028/www.scientific.net/amm.553.281.
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It is well known that bone healing outcomes highly depend on the mechanical microenvironment of the fracture site, and a certain degree of interfragmentary movement (IFM) is essential for indirect (i.e. natural) bone healing. The application of locking compression plate (LCP) internal fixation in the treatment of bone fracture is a common practice which leads to early mobility and full function of the fractured extremity. However should the fixation configuration be too stiff, it might result in delayed healing or asymmetric tissue development across the fracture site due to the fact that IFM in near cortex area is too small to promote healing. Dynamic locking screw (DLS) has been recently designed to tackle this problem by reducing the stiffness of LCP fixation. However, the actual mechano-regulation mechanisms in which DLS uses to regulate the healing process are still not fully understood. The objective of this paper is to develop a computational model to understand the change of mechanical microenvironment of fracture site under LCP with dynamic locking screw in comparison to standard locking screw, and how this change could potentially regulate tissue development within the fracture callus during the healing process.Keywords: bone healing, locking compression plate, dynamic locking screw, finite element modelling
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Yeap, Ewe Juan, and Ajit Singh Deepak. "Failure of Distal Femoral Locking Plate: Case Report." International Journal of Orthopedics and Rehabilitation 1, no. 1 (2022): 1–4. http://dx.doi.org/10.12974/2313-0954.2014.01.01.1.
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The Less Invasive Stabilization System (LISS) and titanium distal femoral locking compression plate (DF-LCP) was designed by the AO Group to combine the advantages of both interlocked intra-medullary nailing and biological plating techniques in one system. The stiffness of the construct is similar to a 95° condylar plate, dynamic condylar screw, or condylar buttress plate.
 We report a case of the DF-LCP and screw breakage. Early weight bearing and lack of callus consolidation precipitated failure of the implant. Non-weight bearing and early autologous bone grafting may be indicated in open distal femoral fractures.
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Sjöström, L., M. Devor, A. Haug, and P. J. Haaland. "Appendicular fracture repair in dogs using the locking compression plate system: 47 cases." Veterinary and Comparative Orthopaedics and Traumatology 22, no. 04 (2009): 309–15. http://dx.doi.org/10.3415/vcot08-05-0044.
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SummaryThe locking compression plate (LCP) has combination screw holes, making it possible to use the implant in three different ways; as a pure internal fixator using locking head screws, as a conventional compression plate using compression screws, or as a hybrid of the two. The experience with the LCP system in veterinary fracture repair is limited. The objective of this study was to evaluate the outcome of appendicular fractures in dogs, which were repaired with the LCP system combined with less invasive surgical techniques. Medical records and radiographs from 47 dogs were studied retrospectively. Thirty-four percent of the fractures were simple, six percent wedge and 60% comminuted fractures of the humerus (11 %), radius and ulna (30 %), femur (34 %) and of the tibia and fibula (25 %). The fractures were treated using the LCP as an internal fixator; in some cases as a plate and rod construct. Forty-six of 47 fractures reached radiographic union. Mean healing time of the fractures was seven weeks (95% confidence interval from 5.8 to 8.3 weeks). There were statistically significant differences in healing time between juvenile (age under one year) and adults. Complications in the form of implant failures and infections were encountered in approximately 11% of the cases. All implant failures were due to surgical errors. The LCP system in combination with a less invasive surgical approach was found advantageous in comminuted fractures where the LCP was used as a bridging plate, in situations when exact plate contouring was difficult, and when other implants prevented the use of bi-cortical screws.
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Sommer, Christoph, Emanuel Gautier, Matthias Müller, David L. Helfet, and Michael Wagner. "First clinical results of the Locking Compression Plate (LCP)." Injury 34 (November 2003): 43–54. http://dx.doi.org/10.1016/j.injury.2003.09.024.
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Shrestha, D., B. M. Acharya, and P. M. Shrestha. "Minimally Invasive Plate Osteosynthesis with Locking Compression Plate for Distal Diametaphyseal Tibia Fracture." Kathmandu University Medical Journal 9, no. 2 (2012): 62–68. http://dx.doi.org/10.3126/kumj.v9i2.6291.
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Background Distal diametaphyseal tibia fracture though requires operative treatment is difficult to manage. Conventional osteosynthesis is not suitable because distal tibia is subcutaneous bone with poor vascularity. Closed reduction and minimally invasive plate osteosynthesis (MIPO) with locking compression plate (LCP) has emerged as an alternative treatment option because it respects biology of distal tibia and fracture hematoma and also provides biomechanicaly stable construct. Objectives To find out suitability of MIPO with LCP for distal diametaphyseal tibia fracture including union time and complicatios and compare wih other available management options in literature. Methods Twenty patients with closed distal diametaphyseal tibia fracture with or without intra articular extension (AO classification: 12 type 43A1, 4 type 43A2, 2 type 43A3 and 2 type 43B1) treated with MIPO with LCP were prospectively followed for average duration of 18.45 months (range 5-30 months). Results Average duration of injury-hospital and injury-surgery interval was 12.8 hrs (range 2-44 hrs) and 4.45 days (range 1-10 days) respectively. All fractures got united with an average duration of 18.5 weeks (range14-28weeks) except one case of delayed union which was managed with percutaneous bone marrow injection. Two patients had union with valgus angulation < 5 degees but no nonunion was found. There were two superficial and one deep post operative wound infection. All infections healed with extended period of intravenous antibiotics besides repeated debridemet for deep infection. Implants were removed in eight patients among whom six (30%) had malleolar skin irritation and pain due to prominent hardware. Conclusion The present case series shows that MIPO with LCP is an effective treatment method in terms of union time and complications rate for distal diametaphyseal tibia fracture. Malleolar skin irritation is common problem because of prominent hardware.DOI: http://dx.doi.org/10.3126/kumj.v9i2.6291Kathmandu Univ Med J 2011;9(2):62-8
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Chandra, Girish, and Ajay Pandey. "Effectiveness of laddered embossed structure in a locking compression plate for biodegradable orthopaedic implants." Journal of Biomaterials Applications 36, no. 7 (2021): 1213–30. http://dx.doi.org/10.1177/08853282211058945.
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Locking compression plate (LCP) has conventionally been the most extensively employed plate in internal fixation bone implants used in orthopaedic applications. LCP is usually made up of non-biodegradable materials that have a higher mechanical capability. Biodegradable materials, by and large, have less mechanical strength at the point of implantation and lose strength even more after a few months of continuous degradation in the physiological environment. To attain the adequate mechanical capability of a biodegradable bone implant plate, LCP has been modified by adding laddered – type semicircular filleted embossed structure. This improved design may be named as laddered embossed locking compression plate (LELCP). It is likely to provide additional mechanical strength with the most eligible biodegradable material, namely, Mg-alloy, even after continuous degradation that results in diminished thickness. For mechanical validation and comparison of LELCP made up of Mg-alloy, four-point bending test (4PBT) and axial compressive test (ACT) have been performed on LELCP, LCP and continuously degraded LELCP (CD-LELCP) with the aid of finite element method (FEM) for the assembly of bone segments, plate and screw segments. LELCP, when subjected to the above mentioned two tests, has been observed to provide 26% and 10.4% lower equivalent stress, respectively, than LCP without degradation. It is also observed mechanically safe and capable of up to 2 and 6 months of continuous degradation (uniform reduction in thickness) for 4PBT and ACT, respectively. These results have also been found reasonably accurate through real-time surgical simulations by approaching the most optimal mesh. According to these improved mechanical performance parameters, LELCP may be used or considered as a viable biodegradable implant plate option in the future after real life or in vivo validation.
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Kummer, M., J. A. Auer, D. Nitzl, A. E. Fürst, and J. M. Kuemmerle. "Locking compression plate osteosynthesis of complicated mandibular fractures in six horses." Veterinary and Comparative Orthopaedics and Traumatology 22, no. 01 (2009): 54–58. http://dx.doi.org/10.3415/vcot-08-01-0001.
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SummaryComplicated mandibular fractures were recognised in one foal, one pony and four horses. The foal was two months old while the adult animals ranged in age from 12 to 24 years. Three horses had a unilateral horizontal ramus fracture. Two fractures were open and one was closed. Comminution was present in one of these patients while the other two horses had marked displacement of the fragments. Two suffered from comminuted fractures of the horizontal and vertical ramus of the mandible. One of these patients had open and infected fractures. One foal had a bilateral horizontal ramus fracture with marked periosteal ‘new bone’ formation and malalignement which required corrective osteotomy. Each horse underwent locking compression plate (LCP) osteosynthesis consisting of open fracture reduction and application of one to three 4.5/5.0 mm LCP at the ventral, lateral or caudal aspect of the mandible under fluoroscopic control. Two 3.5 mm LCP were used in the foal. Plate fixation was supported by application of a cerclage wire construct between the incisor and premolar teeth in most patients. Complete fracture healing, with an excellent functional and cosmetic outcome, was achieved in all of the patients. Complications encountered included seroma formation, screw and wire breakage, as well as implant and apical tooth root infections. The LCP was removed after fracture healing had occurred in four patients.
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Hottmann, Natasha M., Matthew D. Johnson, Scott A. Banks, David Tuyn, and Daniel D. Lewis. "Biomechanical Comparison of Two Locking Plate Constructs for the Stabilization of Feline Tibial Fractures." Veterinary and Comparative Orthopaedics and Traumatology 33, no. 02 (2019): 089–95. http://dx.doi.org/10.1055/s-0039-3399572.
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Abstract Objectives The aim of this study was to compare the biomechanical characteristics of locking compression plate (LCP) and conical coupling plate (CCP) constructs for the stabilization of experimentally induced gap fractures in cat tibiae. Materials and Methods Pelvic limbs were harvested from eight cat cadavers. Paired tibiae were stripped of all soft tissues, and randomly assigned to the LCP or CCP stabilization group. An eight-hole 2.7 mm LCP or a six-hole 2.5 mm CCP was applied to the medial surface of each tibia. A 1-cm segment of the tibia was excised centrally beneath the plate. The specimens were potted, then tested in non-destructive four-point craniocaudal and mediolateral bending, followed by non-destructive axial compression. Each construct was subsequently loaded to failure in axial compression. Bending and axial stiffness, yield load and failure load were calculated for each specimen. Results The LCP constructs were significantly stiffer than the CCP constructs when subjected to non-destructive bending and axial loading. Craniocaudal bending stiffness was significantly greater than mediolateral bending stiffness for both constructs. Yield load and failure load were significantly greater for LCP constructs compared with CCP constructs. Clinical Significance LCP may be a more suitable implant for stabilizing complex diaphyseal tibial fractures in cats. Additional supplemental fixation should be considered when using CCP to stabilize unreconstructed diaphyseal tibial fractures in cats. Further clinical investigation of both implants is recommended.
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Hossain, Md Akter, Mahmuda Khan Misty, and Palash Kumar Chanda. "“Comparing Locking Compression Plate with Limited Contact Dynamic Compression Plate For the Treatment of Adult Diaphyseal Both Bone Forearm Fractures”." International Journal of Medical Science and Clinical Invention 8, no. 09 (2021): 5591–97. http://dx.doi.org/10.18535/ijmsci/v8i09.02.
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Introduction: The human forearm serves an important role in upper extremity function, facilitating placement of the hand in space, thus helping to provide the upper extremity with its unique mobility Fractures involving the bones of forearm present unique problem not encountered with fractures of other long bones.
 Objective: To evaluate and compare the outcomes of locking compression plate (LCP) with limited contact dynamic compression plate (LC-DCP) for the treatment of adult diaphyseal both bone forearm fractures.
 Material and Methods: This study conducted in the Department of orthopedics, Mymensingh Medical College Hospital, Mymensingh, Bangladesh from January 2018 to December 2020 included 20 patients with 40 fractures in each group. Patients were selected randomly to receive either LCP (20 patients, 40 fractures) or LC-DCP (20 patients, 40 fractures). Operative time, callus formation, functional outcome and complications were recorded.
 Results: Mean operative time did not differ significantly in the LCP and LC-DCP group (71.25 and 75.70 minutes respectively) .There was some difference in callus formation and mean time to bone union between the two groups which was significant. However, overall functional outcome did not differ significantly between both the groups. One case had delayed union in the (LC-DCP) group while one patient in each group developed superficial infection.
 Conclusion: In this prospective study comparing LCP with LC-DCP, the outcomes were equal in terms of final functional outcomes and mean operating time but LCP showed slight advantage in terms of callus formation and mean time to bone union.
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Kommuru, Devendra V., Shikhar Singh, Sunil Shetty, Sachin Kale, and Abhilash Srivastava. "Treatment of proximal tibia fractures with locking compression plate: a prospective study." International Journal of Research in Orthopaedics 9, no. 1 (2022): 47. http://dx.doi.org/10.18203/issn.2455-4510.intjresorthop20223438.
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<p><strong>Background</strong>: With the rise in the incidence of proximal tibia fractures in India due to road traffic accidents, this prospective study was intended to assess the operative procedure in the management of such fractures using the locking compression plate (LCP).</p><p><strong>Methods:</strong> 30 subjects attending the study site scheduled to undergo the defined surgery were enrolled as per the study selection criteria.</p><p><strong>Results:</strong> A total of 30 patients with proximal tibia fractures were enrolled. Majority of cases were due to RTAs, with a higher incidence of types IV, V and VI. Average time for union of fracture ranged from around 16-24 weeks. 23 patients were treated with ORIF and 7 patients were treated with MIPO technique. Three different principles of fixation were done using the LCP, viz. compression, bridging and combined. Functional outcome was evaluated, which revealed excellent results in 53.33% patients, good results in 30% patients, fair results in 13.33% results, while 3.33% had poor outcomes.</p><p><strong>Conclusions:</strong> Based on the findings of the present study we can conclude that overall Locking Compression plate (LCP) for fractures of the proximal tibia is a useful adjunct in the management of trauma patients. The locking compression plate system with its various type of fixation act as a good biological fixation including difficult fracture situations.</p>
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Shetty, Shashiraj K., Edward L. Nazareth, Nirath S. Hegde, Ajay Kumar, and Shushruth M. Devanna. "Supercutaneous Plating Technique: A Case Report of Locking Plate Used as an External Fixator." Journal of Karnataka Orthopaedic Association 11, no. 1 (2023): 23–26. http://dx.doi.org/10.13107/jkoa.2023.v11i01.061.
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Introduction: Open fracture is one of the most common and challenging healthcare problem in orthopedic practice1.Despite improvements in implant design, management of open fractures remain a challenge for the orthopedic surgeon. Locked compression plates (LCP) have advantages of angular stability from the locking-head mechanism and less irritation when compared with traditional external fixators due to their low profiles. Here is a case report of the same. Case Report: A 50-year-old lady, a municipal worker by occupation, came to casualty with alleged history of road traffic accident and injury to right thigh and knee. Plain radiograph of of right femur with knee revealed a supracondylar fracture of right femur. As a definitive treatment, patient underwent open reduction and supercutaneous plating. Skin grafting was done for the external wound over distal thigh. The External fixation plate for right distal knee was removed after 6 weeks and knee ROM of 0 to 100 degree flexion was achieved by one year. Conclusion: Open fractures can be treated by external fixation using the LCP plates, which are safe, reliable and have acceptable functional outcomes with minimal complication rates. Its advantages also include ease of performing surgery and ease of removing plate after fracture healing. Keywords: Supercutaneous plating, LCP- locking compression plate, External fixator
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Kaczmarek, Jakub, Tomasz Bartkowiak, Piotr Paczos, Bartosz Gapinski, Hanna Jader, and Martin Unger. "How Do the Locking Screws Lock? A Micro-CT Study of 3.5-mm Locking Screw Mechanism." Veterinary and Comparative Orthopaedics and Traumatology 33, no. 05 (2020): 316–26. http://dx.doi.org/10.1055/s-0040-1709728.
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Abstract Objective To quantify the amount of the screw head thread and the plate hole thread connection in two 3.5 mm locking plates: Locking Compression Plate (LCP) and Polyaxial Locking System (PLS). Materials and Methods A micro - CT scan of a screw head - plate hole connection was performed pre- and post destructive tests. Tests were performed on bone surrogates in a fracture gap model. The 3.5 LCP and 3.5 PLS plates, with 3 perpendicular screws per segment were used in a destructive static test. The 3.5 PLS plates with mono- and polyaxial screws were compared in a cyclic fatigue tests in two orthogonal directions. Pre - and post - test scan datasets were compared. Each dataset was converted into serial images depicting sections cut orthogonally to locking screw axis. The amount of engagement was detected through automated image postprocessing. Results The mean amount of the thread connection for the LCP was 28.85% before and 18.55% after destructive static test. The mean amount of the connection for the PLS was 16.20% before and 14.55% after destructive static test. When inserted monoaxially, the mean amount of the connection for the PLS screws was 14.4% before and 19.24% after destructive cyclic test. The mean amount of the connection for the polyaxial inserted PLS screws when loaded against plate thickness was 2.99% before and 2.08% after destructive cyclic test. The mean amount of the connection for the polyaxial inserted PLS screws when loaded against plate width was 3.36% before and 3.93% after destructive cyclic test. The 3D visualization of the thread connection showed that the initial interface points between screw head and plate hole are different for both LCP and PLS after the destructive testing. Depending on the type of applied force, there was either loss or increase of the contact. Clinical Relevance Micro-CT offers news possibilities in locking implant investigation. It might be helpful in better understanding the nature of locking mechanism and prediction of possible mode of failure in different systems.
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NIEMEYER, P., and N. P. SÜDKAMP. "Principles and Clinical Application of the Locking Compression Plate (LCP)." Acta chirurgiae orthopaedicae et traumatologiae Cechoslovaca 73, no. 4 (2006): 221–28. http://dx.doi.org/10.55095/achot2006/032.
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Kanchanomai, Chaosuan, Panurungsit Muanjan, and Vajara Phiphobmongkol. "Stiffness and Endurance of a Locking Compression Plate Fixed on Fractured Femur." Journal of Applied Biomechanics 26, no. 1 (2010): 10–16. http://dx.doi.org/10.1123/jab.26.1.10.
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The effects of locking screw position (long column fixation—long distance between the nearest screws to the fracture—and short column fixation—short distance between the nearest screws to the fracture) and fracture gap size (1-mm and 8-mm transverse fracture gap) on stiffness and fatigue of fractured femur fixed with a locking compression plate (LCP) were biomechanically evaluated. The stiffness of 1-mm fracture gap models and that of intact femoral model were in the range of 270–284 N/mm, while those of 8-mm fracture gap models were significantly lower (155–170 N/mm). After 1,000,000 cycles of loading, no fracture of LCP of 1-mm fracture gap models fixed in either long column or short column fashions occurred. On the other hand, the complete fractures of LCPs of 8-mm fracture gap models fixed in long column and short column fashions occurred after 51,500 and 42,000 cycles of loading, respectively. These results suggest that the full weight loading may be allowed for the patient with 1-mm transverse femoral fracture fixed with an LCP. On the other hand, the full load of walking should be avoided for the patient with 8-mm transverse femoral fracture fixed with an LCP before adequate healing.
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Akram,, Muhammad. "Comparison of Dynamic Compression Plate Versus Locking Compression Plate Used for Fixation of Humeral Shaft Fractures in Terms of Fracture Healing and Functional Outcome of Shoulder and Elbow Joint." MedERA - Journal of CMH LMC and IOD 7, no. 1 (2025): 92–99. https://doi.org/10.61982/medera.v6i2.237.
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AbstractObjective: To compare the fracture healing and functional outcome of the shoulder and elbow joint in fractures of the shaft of the humerus fixed with a dynamic compression plate versus a locking compression plate.Methodology: Atotal of 66 patients presenting in the Outpatient and Emergency Department of Orthopaedic Surgery, Mayo Hospital, Lahore, were categorized into two treatment groups by lottery method: Group A: Dynamic Compression Plate (n=33) and Group B: Locking Compression Plate (n=33). Modified Constant and Murley Scores and Mayo Elbow Performance Scores were evaluated at 16 and 24 weeks postoperatively.Results: Results revealed no significant difference in terms of fracture healing for treatment modalities th at the 24week of follow up i.e., DCP: 97% vs. LCP: 93.93%, p-value=0.554. Functional shoulder outcome showed a significant difference for both modalities (Modified Constant and Murley Score). 45.5% of patients in the DCPgroup had excellent while patients in the LCPgroup, 12.1% had excellent thoutcomes (p-value=0.016). At the 16week of follow-up in the DCPgroup, 66.7% of patients showed thgood and in the LCPgroup, only 33.3% of patients had good outcomes (p-value=0.015). At the 24follow-up week, 48.5 % of patients in the DCPgroup and 33.3% of patients in the LCPgroup had excellent elbow outcomes.Conclusion: This study demonstrates that DCPis more effective for treating humeral shaft fractures in terms of excellent shoulder and elbow functional outcomes when compared with LCP. However, both fixation devices did not show a statistically significant difference in union.Key Words: Fracture healing, humeral shaft fractures, dynamic compression plate, locking compression plate.
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Glyde, Mark, Robert Day, Giselle Hosgood, and Tim Pearson. "The effect of intramedullary pin size and plate working length on plate strain in locking compression plate-rod constructs under axial load." Veterinary and Comparative Orthopaedics and Traumatology 29, no. 06 (2016): 451–58. http://dx.doi.org/10.3415/vcot-16-01-0008.
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SummaryObjective: To investigate the effect of intramedullary pin size and plate working length on plate strain in locking compression plate-rod constructs.Methods: A synthetic bone model with a 40 mm fracture gap was used. Locking compression plates with monocortical locking screws were tested with no pin (LCP-Mono) and intramedullary pins of 20% (LCPR-20), 30% (LCPR-30) and 40% (LCPR-40) of intramedullary diameter. Two screws per fragment modelled a long (8-hole) and short (4-hole) plate working length. Strain responses to axial compression were recorded at six regions of the plate via three-dimensional digital image correlation.Results: The addition of a pin of any size provided a significant decrease in plate strain. For the long working length, LCPR-30 and LCPR-40 had significantly lower strain than the LCPR-20, and plate strain was significantly higher adjacent to the screw closest to the fracture site. For the short working length, there was no significant difference in strain across any LCPR constructs or at any region of the plate. Plate strain was significantly lower for the short working length compared to the long working length for the LCP-Mono and LCPR-20 constructs, but not for the LCPR-30 and LCPR-40 constructs.Clinical significance: The increase in plate strain encountered with a long working length can be overcome by the use of a pin of 30–40% intramedullary diameter. Where placement of a large diameter pin is not possible, screws should be placed as close to the fracture gap as possible to minimize plate strain and distribute it more evenly over the plate.
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Niraj, Kumar, Farman Ali Md., and Kumar Rakesh. "Comparative Study between Interlocking Nail and Locking Compression Plate for Management of Diaphyseal Fractures of the Humerus." International Journal of Pharmaceutical and Clinical Research 16, no. 6 (2024): 1087–94. https://doi.org/10.5281/zenodo.12739798.
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<strong>Background:</strong> The humerus bone is the long bone located in the upper arm. It extends from the shoulder joint to the elbow joint and is one of the major bones in the human skeleton. The humerus bone is responsible for providing structural support to the upper arm and facilitating movement of the arm. The aim of this study was to compare the outcomes between open reduction and internal fixation by locking compression plate (LCP) and closed reduction and internal fixation with anterograde interlocking nail (ILN) for the treatment of diaphyseal fractures of the humerus. <strong>Methods:</strong> This is a prospective comparative study, with diaphyseal fractures of the humerus treated by LCP in 30 patients and with ILN in 30 patients. Patients were followed up to 18 months. The clinical and radiographic outcomes were assessed in terms of union, complications, reoperation rate and functional outcome using the American shoulder and elbow surgeons’ score (ASES) and Stewart and Hundley’s criteria. <strong>Results:</strong> Union was achieved in 93.3% of patients in LCP group and 90% in ILN group. The mean blood loss in LCP group was 280±22.10 ml (160-400 ml) and in ILN group was 110±17.62 ml (70-150 ml) (p=0.001). The ASES score was 42.47±5.532 in LCP group and 40.93±6.330 in nailing group (p=0.320; p>0.05). Stewart Hundley criteria showed excellent and good results in 26/30 and 17/30 patients in LCP group and ILN group respectively (p=0.070; p>0.05). Complications and re-operation rate were higher in ILN group. <strong>Conclusion:</strong> Our study concludes that LCP can be considered a better surgical option for the management of diaphyseal fractures of the humerus as it had lower incidence of complications, less re-operation rate and better union rate. However, there is no difference between the two groups in terms of union time and functional out-come.
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Singh, Dr Simranjit, Dr Kamal Kumar Arora, Dr Priti Chaudhary, Dr Rajesh Kapila, and Dr Rakesh Sharma. "Role of locking compression plate (LCP) in periarticular fractures knee." International Journal of Orthopaedics Sciences 3, no. 4j (2017): 697–703. http://dx.doi.org/10.22271/ortho.2017.v3.i4j.97.
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Montavon, P. M., and C. S. Schwandt. "Locking Compression Plate fixation of radial and tibial fractures in a young dog." Veterinary and Comparative Orthopaedics and Traumatology 18, no. 03 (2005): 194–98. http://dx.doi.org/10.1055/s-0038-1632946.
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SummaryA six-month-old, male Bernese Mountain Dog in which radius-ulna and tibia-fibula concomitant fractures were treated each with a 3.5 mm Locking Compression Plate (LCP) is presented. Both fractures were approached and plated medially. The tibial fracture had to be revised with a 4.5 mm intramedullary nail and a new 3.5 mm LCP at the second post-operative day because of fixation breakdown. The follow-up radiographs taken at days 14 and 53 revealed uneventful healing of both fractures. Implants were removed 53 days after surgery.
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A. A., Faizal Ali, Govind Karunakaran, and Hijas Hameed. "Assessment of efficacy of locking compression plate in distal femur fractures." International Surgery Journal 8, no. 9 (2021): 2589. http://dx.doi.org/10.18203/2349-2902.isj20213214.
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Background: Distal femur fractures account for an estimated 6% of all femur fractures. Our study aims at evaluating the functional and radiological outcome in distal femur fractures treated with locking compression plate (DF-LCP).Methods: Patients undergoing LCP were assessed postoperatively both functionally and radiologically. Oxford Knee Score was used to assess the functional outcome. With a maximum score of 48, a score of more than 41 is scaled as excellent, 34 to 40 as good functional status, 27 to 33 as fair and score less than 27 as poor functional result.Results: Extra-articular fractures were the commonest (66.7%) type of fractures [simple-6.7%; metaphyseal wedge-20%; metaphyseal complex-40%] followed by complete articular fractures (26.7%) [Simple articular metaphyseal comminution-16.7%; metaphyseal and intra-articular comminution-10%] and partial articular fractures (6.7%) [Medial condyle-3.3%; coronal plane-3.3%]. Most of them had right sided femur injury (66.7%) and had history of fall (70%). Radiologically, 90% exhibited no complications and had united appropriately. Functionally the mean oxford knee score was 41.53±1.69 which ranged from a score of 38 to a maximum of 44. Highest proportion i.e., 63.3% had excellent outcome followed by good functional outcome and none showed fair or poor outcomes.Conclusions: LCP has shown very good radiological and functional outcomes with hundred percent union of the distal femur fractures. Hence it can be used successfully in distal femur fractures.
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Levasseur, A., M. Lacourt, Y. Elce, Y. Petit, and E. Almeida da Silveira. "Biomechanical testing of a hybrid locking plate fixation of equine sesamoid osteotomies." Veterinary and Comparative Orthopaedics and Traumatology 27, no. 02 (2014): 107–12. http://dx.doi.org/10.3415/vcot-13-06-0084.
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SummaryTo compare the biomechanical properties of a hybrid locking compression plate (LCP) construct with the compression screw technique as a treatment for transverse mid-body proximal sesamoid bone fractures.Ten paired forelimbs from abattoir horses were used. The medial proximal sesamoid bone of each limb was osteotomized transversely and randomly assigned, to either repair with a two-hole 3.5 mm LCP or a 4.5 mm cortical screw placed in lag fashion. Each limb was tested biomechanically by axial loading in single cycle until failure. The point of failure was evaluated from the loaddisplacement curves. Then a gross evaluation and radiographs were performed to identify the mode of failure.The loads to failure of limbs repaired with the hybrid LCP construct (4968 N ± 2167) and the limbs repaired with the screw technique (3009 N ± 1091) were significantly different (p <0.01). The most common mode of failure was through a comminuted fracture of the apical fragment of the proximal sesamoid bone.The LCP technique has potential to achieve a better fracture stability and healing when applied to mid-body fractures of the proximal sesamoid bone. Further testing, particularly fatigue resistance is required to corroborate its potential as a treatment option for mid-body fractures of the proximal sesamoid bone.
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Ramlee, Muhammad Hanif, Mohamad Hafiz Mohamad Afandi, Hong Seng Gan, and Mohammed Rafiq Abdul Kadir. "Biomechanical analysis of conventional and locking compression plate for treating fibula fracture: A finite element study." Malaysian Journal of Fundamental and Applied Sciences 16, no. 4 (2020): 433–36. http://dx.doi.org/10.11113/mjfas.v16n4.1709.
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1) Background: Due to questionable effectiveness of malleolar fracture fixation, biomechanical study was conducted to compare the stability of One Third Tubular (OTT) Plate and Locking Compression Plate (LCP); 2) Methods: CT image of bone was used to develop 3D bone model while the plate was constructed in Solidwork with varied number of screws. Further, finite element study was conducted for both models where the bone and plate were defined as homogenous and isotropic material properties; 3) Results: For LCP, the highest VMS observed at the plate for 3 screws was 484 MPa, whereas for 5 screws plate was 667 MPa. Meanwhile, for OTT, the highest VMS at plate was observed for 3 screws was 300.5 MPa, whereas for 5 screw plate was 127.5 MPa. 4) Conclusion: Based on the results, it can be noted that the usage of 3 screw causing a lower VMS at plate compared to 5 screws. However, the relation is only valid for LCP. On the other hand, for OTT, 5-screw constructs giving a low VMS than 3-screw constructs. It can be concluded that the optimum stabilities of OTT and LCP were found at 5 screws and 3 screws, respectively.
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Mustofa, Md Gulam, Chowdhury Foyzur Rob, Md Kamrul Alam, et al. "Outcome of Dynamic Condylar Screw with Plate versus Distal Femoral Lock Compression Plate Fixation in Fracture of Distal Femur." Medicine Today 33, no. 1 (2021): 45–49. http://dx.doi.org/10.3329/medtoday.v33i01.52159.
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Introduction: The dynamic compression screw with plate implant used to treat fractures of the distal femur. The distal femoral lock compression plate fixation is designed as an alternative surgical option to treat these fractures. The objective of this study was to assess the comparative endurance of both devices. The objective of the study is to compare the outcome of DF-LCP and DCS fixation in distal femoral fractures.
 Materials and Methods: This prospective comparative study was conducted in the Department of Orthopaedics, Sylhet MAG Osmani Medical College Hospital, Sylhet between January 2011 and December 2012. Thirty patients with AO type 33-B and 33-C fracture were selected and were divided randomly into group-A and group-B by odd and even number. Dynamic condylar screw (DCS) fixation was used in group-A and distal femoral locking compression plate (DF-LCP) fixation in group-B.
 Results: DCS group [9 male, 6 female; mean age, 44.9 ± 12.9 years] and DF-LCP group [10 male, 5 female; mean age, 42.6 ± 15.7) years] were similar in age (p=0.660) and sex (p=0.705). The total operation (minutes) [92.3 ± 7.5 versus 90.4 ± 6.9; p=0.484], length of postoperative hospital stay (days) [6.0 ± 0.9 versus 5.9 ± 0.9; p=0.695] and union time (weeks) [20.6 ± 5.0 versus 18.7 ±3.3 weeks; p=0.238] did not differ significantly between two groups. Total complications [6 (40.0%) versus 4 (26.7%); p=0.439] was also similar in both groups. Functional outcome was excellent in 13.3%, good in 33.3%, fair in 33.3% and poor in 20.0% cases in DCS group; while excellent in 53.3%, good in 20.0% fair in 6.7% and poor in 20.0% of cases in DF-LCP group; different was not significant (p=0.080).
 Conclusion: Dynamic condylar screw with plate and distal femoral locking compression plate fixation are equally effective for achieving satisfactory union and functional outcome in AO type 33-B, 33-C fracture distal femur.
 Medicine Today 2021 Vol.33(1): 45-49
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Gupta, Gaurav, Rabins Kumar Sah, Prashant Thakur, M. Ruhullaha, and Subash Thapa. "Functional Outcome of Locking Compression Plate in Distal Femur Fractures." Med Phoenix 8, no. 2 (2023): 7–13. http://dx.doi.org/10.3126/medphoenix.v8i2.61825.
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Introduction: Distal femur fracture is common in young people with high velocity injury. Management of distal femur fractures is a therapeutic challenge in orthopedics practice due to its extensive soft tissue injuries, bone loss, comminution, articular extension, instability.Open reduction with internal fixation replaces previous trend of closed conservative management and external fixation. Distal femoral locking compression plate (DF-LCP) requires both locking and compression screw fixation of the femur shaft. DF-LCP has been rapidly adopted as an alternative to intramedullary nails, blade plates and non-locking condylar screw.Materials and Methods: Prospective interventional study was done in department of orthopedics at National Medical College and Teaching Hospital, Birgunj for one year among 45 patients of age more than 18 years with post traumatic closed or open GA Type I, II distal femur fractures, AO Muller type A and C fractures. Ethical approval was obtained from institutional review committee and proper informed consent was taken. Type of implant used was DF-LCP.NEER’S scoring system was used for functional outcome.Results: Out of 45 patients, 42 patients with distal femur fracture were treated by DF-LCP.Three patients lostduring follow up hence removed from study. Out of 42 patients, mean age of the patients was 36.62 years. Most of them 31, (73.8%) were male. Predominant fracture was on right side 29 (69%).The study finding showed that 30 (71.4%) sustained injury due to road traffic accidents. Most of the patients 18 (42.9%) had type A2 fracture according to AO Muller distal femur fracture classification. Complications like surgical site infection observed in 3 cases. 100% union rate achieved with an average union time of 17.26 weeks. On evaluation according to Neer’s criteria mean score was 82.1 (Range: 48-96). Out of 42 patients 24 (57%) had excellent, 14 (33%) had good, 3 (7.2%) had fair and 1 (2.4%) had poor result.Conclusion: The study concluded DF-LCP is effective treatment for distal femur fracture. It provides stable construct for fracture union with excellent functional outcome.
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Sulong, Muhammad Syawal Aiman, Ardiyanshah Syahrom, and Zulfadzli Zakaria. "Study of Locking Compression Plate Through Biodegradable Implant." Journal of Medical Device Technology 1, no. 1 (2022): 56–63. http://dx.doi.org/10.11113/jmeditec.v1n1.18.
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Orthopaedic implant biomechanics research is booming, especially in bone fixation. Fixation involves securing a plate to a broken bone. The femur fractured mostly. Long bone fractures can be difficult to cure despite technological and medical breakthroughs. This study analyses the performance and optimal screw arrangement for biodegradable locking compression plate. This study compares biodegradable bone plate materials to identify the best (Iron, Zinc and Magnesium). SolidWorks models fracture repair plates and fixes them in a normal walking condition to a mid-ship fracture. Further, finite element analysis was performed on models with homogeneous and isotropic bone and plate. Simulation was done using COMSOL programme and screws. Idealized poroelastic 3D FE femoral model with 5 mm fracture gap and plate-screw design. We saw stress and displacement. The minimal von Mises stress and deformation for 6 screws. Under pure zinc and magnesium load, the highest von Mises stress was 7.94 MPa and the maximum deformation was 0.08 mm, proving that iron was the best material. Based on finite element analysis, the LCP can offer mechanical stability for comminuted fractures, fixing the bone block and promoting bone healing.
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Chhaily, Zuhair A., Ahmed I. Joda, Ahmed S. Abd Ali, and Zaid H. Ali. "IS LOCKED COMPRESSION PLATE BETTER THAN LIMITED CONTACT DYNAMIC COMPRESSION PLATE IN TREATMENT OF CLOSED MIDDLE THIRD RADIUS AND ULNAR FRACTURES IN ADULTS: A SHORT-TERM COMPARATIVE STUDY." Iraqi Journal of Medical Sciences 20, no. 1 (2022): 146–53. http://dx.doi.org/10.22578/ijms.20.1.19.
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Background: Forearm bone fracture is a commonly encountered fracture. The inception of locking compression plate (LCP) has revolutionized fracture management. With their dramatic success for articular fractures, there is a speculation that they might be more appropriate for diaphyseal fractures as well. Objective: To compare internal fixation of closed, middle third forearm fractures with LCP and limited contact dynamic compression plate (LC-DCP) in adults with respect to union rate, implant failure, functional outcome, and infection rate. Methods: Twenty-two patients with closed, middle third fractures of both the forearm bones were involved in this prospective, randomized, controlled study, which took place between February 2019 to January 2021. They were segregated into two groups based on open reduction and internal fixation with LCP (n=11) and with LC-DCP (n=11). Postoperative follow-up intervals of 1, 2, 6 weeks and 3, 6 months. The patients were assessed for implant failure, fracture union and function outcome of Andersons’ criteria to assess union, forearm rotation, and wrist flexion-extension, and disabilities of the arm, shoulder and hand (DASH) score for patient related outcome at the latest follow up. Results: The mean age of the patients was 30.9 years (range 19-47 years) with mean follow up about of 2 years. The union rate in LCP group was (100%) whereas in LC-DCP was (81.8%), the p value was (0.4), which is not statistically significant. The p value for Quick DASH score and Anderson’ criteria were (0.8 and 0.43), respectively which is also not statistically significant. No incidence of implant failure in both groups. Conclusion: Although LCP is an effective treatment alternative and may have a subtle edge over LC-DCP in the management of these fractures, their supremacy could not be certified. We deduce that surgical planning and expertise rather than the choice of implant are more pivotal for outstanding results. Keywords: Limited contact dynamic compression plate, locking compression plate, closed, middle third fractures, both bones of forearm Citation: Chhaily ZA, Joda AI, Abd Ali AS, Ali ZH. Is locked compression plate better than limited contact dynamic compression plate in treatment of closed middle third radius and ulnar fractures in adults: A short-term comparative study. Iraqi JMS. 2022; 20(1): 146-153. doi: 10.22578/IJMS.20.1.19
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Ishfaq Mazari, Muhammad, Muhammad Mannan, Shazeen Eisha, and Khandaker T. Ahmed. "Efficacy of Locking Compression Plate in Comparison with Intramedullary Nailing for Humerus Shaft Fracture." International Journal of Health Policy Planning 3, no. 3 (2024): 01–05. http://dx.doi.org/10.33140/ijhpp.03.03.03.
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Background: Humeral shaft fractures constitute approximately 5% of all fractures. Surgical fixation is commonly achieved using either intramedullary nails (IMNs) or locking compression plates (LCPs), each with distinct advantages. IMNs are valued for their minimally invasive approach, while LCPs offer superior stability and control over fracture reduction. Objective: This study aimed to compare the efficacy of IMNs and LCPs in managing humeral shaft fractures, focusing on operative parameters, postoperative recovery, and functional outcomes. Methodology: This retrospective case study was conducted at Sheikh Zayed Medical College/Hospital Rahim Yar Khan, including patients treated between March 1, 2018, and February 28, 2019. A total of 68 patients with humeral shaft fractures were reviewed. The patients were divided into two groups based on the surgical fixation method used. • IMN Group: 34 patients underwent intramedullary nailing. • LCP Group: 34 patients received locking compression plate fixation. Patients were followed retrospectively after their surgery for a period of one year. Data were collected on operative time, length of hospital stay, intraoperative blood loss, and functional recovery through a review of medical records and follow-up assessments Results: Demographics: The mean age was 38.05 ± 11.5 years for the IMN group and 39.7 ± 12.3 years for the LCP group. Operative Metrics: The IMN group demonstrated significantly shorter operative times, reduced hospital stays, and lower intraoperative blood loss (P < 0.05). Functional Outcomes: Patients in the IMN group showed superior functional recovery, exhibiting better range of motion, enhanced strength, and improved ability to perform daily activities without pain or restriction. Conclusion: Intramedullary nailing is a more effective treatment for humeral shaft fractures compared to locking compression plating. The benefits observed include reduced blood loss, shorter operative time, decreased hospital stay, faster bone union, and fewer complications. Therefore, intramedullary nailing is recommended as the preferred surgical approach for managing humeral shaft fractures.
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Cabassu, J. B., M. P. Kowaleski, J. K. Shorinko, C. A. Blake, G. R. Gaudette, and R. J. Boudrieau. "Single cycle to failure in torsion of three standard and five locking plate constructs." Veterinary and Comparative Orthopaedics and Traumatology 24, no. 06 (2011): 418–25. http://dx.doi.org/10.3415/vcot-11-04-0050.
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SummaryObjectives: The biomechanical properties of standard plates and recently designed locking plates were compared in torsion. We hypothesized that titanium (Ti) constructs would have the greatest deformation, and String of Pearls (SOP) constructs the greatest strength and stiffness.Methods: Dynamic compression plates (DCP), stainless steel (SS) limited contact (LC)-DCP, Ti LC-DCP, locking compression plate (LCP), 10 mm and 11 mm Advanced Locking Plate System (ALPS) 10 and 11, SOP and Fixin plates were applied to a validated bone model simulating a bridging osteosynthesis. Yield torque (strength), yield angle (deformation) and stiffness were compared using one-way ANOVA with post hoc Tukey (p <0.05).Results: The ALPS 11 constructs had significantly greater elastic deformation than all constructs except for the ALPS 10. There were not any differences in strength observed except for the ALPS 10 constructs, which was less than that for the SOP, LCP, DCP and ALPS 11 constructs. No differences in construct torsional stiffness were observed with the SS LCDCP, DCP, LCP and SOP constructs however all had greater stiffness than all remaining constructs. The ALPS 10 construct had lower stiffness than all constructs.Clinical significance: Modulus of elasticity of Ti explains the higher deformation and lower stiffness of these systems, with similar results for the Fixin due to its lower section modulus compared to all other plates. The SOP and standard constructs had surprisingly similar biomechanical properties in torsion. The rationale for selecting these implants for fracture repair likely needs to be based upon their differing biomechanical properties inherent to the diverse implant systems.Presented at the 38th Annual Conference of the Veterinary Orthopedic Society, Snowmass, Colorado, USA March 6, 2011.
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Dumpies, C., T. Conrad, I. Marintschev, and G. Hofmann. "Locking Attachment Plate – Erste Erfahrungen." Zeitschrift für Orthopädie und Unfallchirurgie 150, no. 03 (2012): 302–8. http://dx.doi.org/10.1055/s-0031-1298530.
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Hintergrund: In dieser Arbeit stellen wir unsere ersten Erfahrungen in der Anwendung einer neuen, winkelstabilen Plattenosteosynthese vor: Locking Attachment Plate (LAP, Fa. Synthes, Oberdorf, Schweiz). Wir prüften, ob die LAP eine sinnvolle Ergänzung in der bisherigen technischen Versorgung periprothetischer Frakturen darstellt. Die LAP wird bei periprothetischen Frakturen mit stabil einliegender Endoprothese bzw. Frakturen um intramedulläre Implantate angewandt. Die Plattenosteosynthese wird z. B. auf eine 4,5-mm Locking Compression Plate (LCP) installiert. Über ihre 4 diagonal angebrachten Arme können Verriegelungs- oder Kortikalisschrauben winkelstabil, bikortikal um den Prothesenschaft in den Knochen eingebracht werden. Die LAP soll den lateralen Schraubenausbruch verhindern, den Prothesenschaft stabilisieren und somit die frühzeitige postoperative Mobilisierung der Patienten ermöglichen. Patienten und Methoden: Wir implantierten die LAP mittels operativer Frakturbehandlung in ORIF-Technik bei 17 Patienten mit periprothetischen Frakturen an Femur, Tibia und Humerus. Der Nachbeobachtungszeitraum betrug mindestens 13 Monate. Ergebnisse: Es entgingen 2 Patienten der Verlaufsbeobachtung, da sie wenige Wochen postoperativ aufgrund ihrer Begleitmorbiditäten starben. Insgesamt kam es in 2 von 17 Fällen zum Infektgeschehen (11,8 %). Es wurden 15 Patienten nachuntersucht. Davon erlangten 11 Patienten ihren ursprünglichen Bewegungsumfang (ROM) und 9 Patienten ihre Ausgangsmobilität wieder. Alle Patienten mit periprothetischen Humerusfrakturen verzeichneten muskuläre Defizite. In 5 von 15 Fällen (33,3 %) konnte zumindest radiologisch keine Frakturheilung festgestellt werden. Dennoch lag bei 14 von 15 Patienten das Implantat stabil ein, ohne Zeichen einer Implantat- oder Prothesenlockerung. Es trat kein Fall von Materialversagen auf. Schlussfolgerung: Periprothetische Frakturen sind eine immer häufiger werdende Komplikation beim alten, oft multimorbiden Patienten. Eine rasche therapeutische Intervention und die frühzeitige postoperative Mobilisierung tragen entscheidend zum Behandlungserfolg bei. Die ersten Ergebnisse in der Anwendung der LAP als neues Implantat zur Versorgung periprothetischer Frakturen an Femur, Tibia und Humerus sind vielversprechend. Es bedarf weiterer Studien, um zu zeigen, ob unsere insgesamt guten Ergebnisse in größeren Patientenkollektiven reproduzierbar sind und die LAP einen festen Stellenwert im technischen Repertoire zur Therapie periprothetischer Frakturen einnehmen kann.
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Le Pommellet, Helene, Audrey Savin, Adeline Decambron, et al. "Complications of appendicular fracture repair in cats and small dogs using locking compression plates." Veterinary and Comparative Orthopaedics and Traumatology 29, no. 01 (2016): 46–52. http://dx.doi.org/10.3415/vcot-14-09-0146.
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SummaryObjective: Our objectives were: 1) to review the complications associated with stabilization of appendicular fractures in cats and small dogs using locking compression plates (LCP), and 2) to identify factors that could influence fixation construct stability.Study design: Retrospective clinical study.Materials and methods: Medical and radiographic records of cats and small dogs with appendicular fractures treated with LCP were reviewed. Only cases with adequate follow-up to document clinical union and cases for which complications appeared before the clinical union were included. Complications were classified as implant-related complications or other complications. Cases with implant-related complications were compared to cases with non-implant-related complications for differences in signalment (species, age, body weight, multiple fractures), fracture location and type (fractured bone, fracture localization, closed or open fracture), reduction method (open reduction and internal fixation [ORIF] or minimally invasive plate osteosynthesis [MIPO]) and fixation evaluations (implant size, platebridging ratio, plate span ratio, working length, plate screw density, number of screws and cortices engaged per plate and per main fragment, ratio between screw and bone diameter at the narrowest aspect of the bone, and presence of ancillary fixation).Results: Seventy-five fractures from 63 cats (64 fractures) and 10 dogs (11 fractures) met the inclusion criteria. Eight humeral, 13 radio-ulnar, 26 femoral, and 28 tibio-fibular fractures were treated. Primary repair of the fracture was performed using 2.0 mm and 2.4 mm LCP in 22 and 53 fractures, respectively. Overall and implant-related complications were encountered in 13 and seven of 75 fractures, respectively. Fixation failure was not significantly associated with any aforementioned factor considered in this study, and in particular, there was no significant difference in the occurrence of fixation failure between fractures stabilized with two, or more than two, bicortical locking screws per main fragment.Clinical significance: 2.0 mm and 2.4 mm LCP were used to manage appendicular fractures in cats and small dogs. The overall complication and fixation failure rate were comparable to those reported in previous studies in which various locking plate systems were used.Online Supplementary Material for this article is available at: http://dx.doi.org/10.3415/VCOT-14-09-0146
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Mohandes, Yousof, Masoud Tahani, Gholamreza Rouhi, and Mohammad Tahami. "A mechanobiological approach to find the optimal thickness for the locking compression plate: Finite element investigations." Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 235, no. 4 (2021): 408–18. http://dx.doi.org/10.1177/0954411920985757.
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This study aimed at finding the acceptable range, and the optimal value for the locking compression plate (LCP) thickness (THK), through simulating the osteogenic pathway of bone healing, and by checking bone-plate construct’s strength and stability. To attain the goals of this research, a multi-objective approach was adopted, which should trade-off between some conflicting objectives. A finite element model of the long bone-plate construct was made first, and validated against an experimental study. The validated model was then employed to determine the initial strength and stability of the bone-plate construct, for the time right after surgery, for various thicknesses of the LCP. Afterward, coupling with a mechano-regulatory algorithm, the iterative process of bone healing was simulated, and follow up was made for each LCP thickness, over the first 16 post-operative weeks. Results of this study regarding the sequence of tissue evolution inside the fracture gap, showed a similar trend with the existing in-vivo data. For the material and structural properties assigned to the bone-plate construct, in this study, an optimal thickness for the LCP was found to be 4.7 mm, which provides an enduring fixation through secondary healing, whereas for an LCP with a smaller or greater thickness, either bone-implant failure, unstable fixation, impaired fracture consolidation, or primary healing may occur. This result is in agreement with a recent study, that has employed a comprehensive optimization approach to find the optimal thickness.