Academic literature on the topic 'LC-DCP plate'

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Journal articles on the topic "LC-DCP plate"

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Hill, C. M., T. Kageyama, M. G. Conzemius, G. K. Smith, and F. M. Little. "Bending properties of stainless steel dynamic compression plates and limited contact dynamic compression plates." Veterinary and Comparative Orthopaedics and Traumatology 14, no. 02 (2001): 64–68. http://dx.doi.org/10.1055/s-0038-1632677.

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SummaryThe equivalent bending stiffness and bending strength of the stainless steel DCP and stainless steel LC-DCP were compared. Three plates, of each size, were tested destructively in ‘four point bending’. All of the LC-DCP were significantly less stiff and less strong than the comparable size DCP, with the exception of the 4.5 mm narrow LC-DCP which was significantly stronger and more stiff than the 4.5 mm narrow DCP (p <.01). The design advantages of the LC-DCP are ease and versatility of plate application and improved cortical blood flow which one assumes promotes fracture healing. Also, the lower recorded stiffness of the LC-DCP may be advantageous in that it decreases the stress protection of the plated bone. Since optimal strength and stiffness of bone plates are currently unknown, the clinical relevance of the decreased strength and stiffness of the LC-DCP has yet to be determined.Stainless steel LC-DCP and DCP of various sizes were tested in four point bending to ascertain equivalent bending stiffness and bending strength of each type of plate. The LC-DCP were consistently less stiff and strong than their DCP counterparts (p <.01) with the exception of the 4.5 mm Narrow LC-DCP which was stronger and more stiff than the 4.5 mm Narrow DCP. In general, as plate size increased. the difference between the two plate designs decreased. If it can be shown that there is not any detrimental effect on fracture healing, the design features of the LC-DCP make it a desirable choice for most fracture applications.
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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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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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Horstman, C. L., R. L. Crawford, T. Vaughn, S. Elder, R. McLaughlin, and M. Maxwell. "The effects of screw placement on plate strain in 3.5 mm dynamic compression plates and limited-contact dynamic compression plates." Veterinary and Comparative Orthopaedics and Traumatology 22, no. 02 (2009): 125–31. http://dx.doi.org/10.3415/vcot-08-02-0023.

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SummaryThe objective of this study was to evaluate the effect of screw omission on plate strain during axial load to failure and cycling using a Delrin rod gap model. In addition, the differences between the 3.5 mm limited-contact dynamic compression plate (LC-DCP) and the 3.5 mm dynamic compression plate (DCP) were evaluated. Six, 12-hole LC-DCP and DCP plates were applied to Delrin rods with a 1 cm gap located within the central portion of the plate. Six screw configurations were tested with the following variations: three proximal and three distal (six open), four proximal and three distal (five open), four proximal and four distal (four open), five proximal and four distal (three open), five proximal and five distal (two open), six proximal and five distal (one open). Three strain gauges were mounted on each plate within the gap (gauge three) and extended proximally. Additionally, three constructs (six, three, and one open hole) were tested to failure in cyclic loading. The strain measured within the gap (gauge three) was significantly greater than the strain at other gauges for each screw configuration. Strain within the gap did not significantly change with any screw configuration, but did significantly increase at other locations as screws were omitted. Overall, the DCP withstood significantly more cycles than the LC-DCP. Differences were noted within the DCP group with the 6/5 screw configuration lasting for significantly more cycles than the 5/4 and 3/3 constructs. Although overall strain at the gap did not significantly increase with screw omission, the clinical significance remains to be determined.
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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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Benamou, J., R. M. Demianiuk, S. Rutherford, et al. "Effect of bending direction on the mechanical behaviour of 3.5 mm String-of-Pearls and Limited Contact Dynamic Compression Plate constructs." Veterinary and Comparative Orthopaedics and Traumatology 28, no. 06 (2015): 433–40. http://dx.doi.org/10.3415/vcot-15-01-0013.

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SummaryObjective: To compare the bending properties of String-of-Pearls® (SOP) and Limited Contact Dynamic Compression Plate® (LCDCP) constructs in orthogonal bending directions.Methods: 3.5 mm SOP and LC-DCP plates were fixed to a bone model simulating a comminuted tibial fracture. Specimens were non-destructively tested in both mediolateral and craniocaudal bending for 10 cycles. Bending stiffness and total angular deformation were compared using parametric analyses (p <0.05).Results: For both constructs, stiffness was significantly less when bending moments were applied against the thickness of the plates (mediolateral bending) than against the width (craniocaudal bending). When compared to the mediolateral plane, bending constructs in the craniocaudal plane resulted in a 49% (SOP group) and 370% (LC-DCP group) increase in stiffness (p <0.001). Mediolateral bending stiffness was significantly greater in the SOP than the LC-DCP constructs. Conversely, in craniocaudal bending, SOP constructs stiffness was significantly less than that of the LC-DCP constructs. The differences between the two constructs in total angular deformation had an identical pattern of significance.Clinical significance: This study found that SOP showed less variability between the orthogonal bending directions than LC-DCP in a comminuted fracture model, and also described the bi-planar bending behaviour of both constructs. Although not exhibiting identical bending properties in both planes, SOP constructs had a more homogenous bending behaviour in orthogonal loading directions. The difference between the SOP with a circular cross sectional shape compared to the rectangular shape of standard plates is probably responsible for this difference.
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Nelson, Thomas, and Adam Strom. "Outcome of Repair of Distal Radial and Ulnar Fractures in Dogs Weighing 4 kg or Less Using a 1.5-mm Locking Adaption Plate or 2.0-mm Limited Contact Dynamic Compression Plate." Veterinary and Comparative Orthopaedics and Traumatology 30, no. 06 (2017): 444–52. http://dx.doi.org/10.3415/vcot-17-01-0005.

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Abstract Objectives Retrospective evaluation of repairing distal radial and ulnar fractures in small breed dogs with the Synthes 1.5-mm locking Adaption plate system and compare results in a similar group of patients repaired with the Synthes 2.0-mm limited contact-dynamic compression plate (LC-DCP). Methods Electronic medical records from one specialty referral centre were reviewed from March 21, 2010, to October 9, 2015, for patients weighing less than or equal to 4 kg that had a distal one-third radial and ulnar fracture repaired with a Synthes 1.5-mm locking adaption plate or Synthes 2.0-mm LC-DCP. Further inclusion criteria included application of the plate to the cranial surface of the radius via open reduction and internal fixation. Results Six 1.5-mm Adaption plates and 7 2.0-mm LC-DCPs were used to repair 13 distal radial and ulnar fractures in 12 dogs. There were three major complications in the 1.5-mm adaption plate group (one plate fracture, one screw pull-out and one fracture through a distal screw hole) and one major complication in the 2.0-mm LC-DCP group due to a re-fracture. All patients without a complication had good or excellent functional outcome. Clinical Significance The authors recommend that the 1.5-mm Adaption plate be used only when a 2.0-mm LC-DCP would not allow for a minimum of two screws in the distal segment and at the discretion of the surgeon.
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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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Perren, S. M., K. Mane, O. Pohler, M. Predieri, S. Steinemann, and E. Gautier. "The limited contact dynamic compression plate (LC-DCP)." Archives of Orthopaedic and Trauma Surgery 109, no. 6 (1990): 304–10. http://dx.doi.org/10.1007/bf00636166.

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Blake, C. A., B. S. Torrance, E. K. Tacvorian, et al. "Single cycle to failure in bending of three standard and five locking plates and plate constructs." Veterinary and Comparative Orthopaedics and Traumatology 24, no. 06 (2011): 408–17. http://dx.doi.org/10.3415/vcot-11-04-0061.

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SummaryObjective: To evaluate the biomechanical properties of standard and locking plates in bending. We hypothesised that titanium (Ti) constructs would have the greatest deformation and that String of Pearl (SOP) constructs would have the greatest strength and stiffness, and would behave differently compared to plates alone.Methods: Dynamic compression plates (DCP), stainless steel (SS) limited contact (LC)-DCP®, Ti LC-DCP, locking compression plates (LCP), 10 mm and 11 mm advanced locking plate system (ALPS 10 / 11), SOP and Fixin plates were evaluated individually and as constructs applied to a validated bone model simulating a bridging osteosynthesis. Bending stiffness and strength were compared using one-way ANOVA with post hoc Tukey, and un-paired t-test (p <0.05).Results: The SOP plates had significantly greater stiffness than all other plates Ti LCDCP, ALPS 10 and Fixin plates had significantly lower stiffness than all other plates. The SOP constructs had the highest mean bending stiffness, and strength that was significantly different from only the Ti LC-DCP, ALPS 10 and Fixin constructs. The ALPS 10 constructs had the lowest mean bending stiffness, and strength that was significantly different from only ALPS 11 and SOP constructs. Comparison of bending structural stiffness of plates versus constructs showed a significant difference in all plate pairs except for the DCP and ALPS 10.Clinical relevance: Due to differing plate construct properties inherent to these diverse implant systems, identical approaches to fracture management and plate application cannot be applied.Presented at the 38th Annual Conference of the Veterinary Orthopedic Society, Snowmass, CO, USA March 6, 2011 (Mark S. Bloomberg Memorial Research Award recipient).
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Dissertations / Theses on the topic "LC-DCP plate"

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Filipowicz, Dean. "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." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/33558.

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Objective- To compare the biomechanical properties of 3.5 locking compression plate (LCP) fixation to 3.5 limited contact dynamic compression plate (LC-DCP) fixation in a canine cadaveric, distal humeral metaphyseal gap model in static axial compression and cyclic axial compression and torsion. Study Design- Biomechanical in vitro study. Sample Population- 30 paired humeri from adult, medium to large breed dogs. Methods- Testing was performed monotonically to failure in axial compression on ten pairs of humeri, cyclically in axial compression for 10,000 cycles on ten pairs and cyclically in torsion for 500 cycles on the last ten pairs. Results- Humeral constructs stabilized with LCPs were significantly stiffer than those plated with LC-DCPs when loaded in axial compression (P=0.0004). When cyclically loaded in axial compression over 10,000 cycles, the LC-DCP constructs were significantly stiffer than those constructs stabilized with LCPs (P=0.0029). Constructs plated with LC-DCPs were significantly more resistant to torsion over 500 cycles than those plated with LCPs (P<0.0001), though no difference was detected during the first 280 cycles. Conclusions- The increased stiffness of LCP constructs in monotonic loading compared to constructs stabilized 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. Clinical Relevance- LCPs yield less stiff fixation under dynamic loading than conventional LC-DCPs when applied to severely comminuted, metaphyseal fractures. Improving anatomical contouring of the plate and insuring complete screw insertion into the locking plate hole may improve stiffness when using LCPs in comminuted fractures.<br>Master of Science
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Pimentel, Luiz Fernando Rapp de Oliveira. "Estudo biomecânico de flexão (ex-vivo) em osteotomia no diastema de mandíbulas de equinos com placas bloqueadas e implantes transdentários." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/10/10137/tde-30042013-170426/.

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Fraturas do diastema mandibular são cirurgicamente mais desafiadoras porque, geralmente são bilaterais, instáveis e altamente contaminadas. Como cada fratura tem características particulares e são únicas, o conhecimento de diferentes técnicas de reparo permitirá que ao veterinário escolher um método de fixação mais adequado à configuração da fratura, considerando os equipamentos disponíveis, a expertise e preferências do cirurgião. O objetivo deste estudo foi avaliar 2 técnicas de fixação de fraturas do diastema mandibular por meio da mensuração de suas características biomecânicas. Mandíbulas osteotomizadas no diastema foram divididas em 2 grupos de fixação (n=8). As mandíbulas foram fixadas com placas bloqueadas (LCP) e por meio de implantes transdentários com placas LC-DCP. Oito mandíbulas intactas (não osteotomizadas) foram submetidas aos ensaios biomecânicos como controle. As mandíbulas foram submetidas à ensaios biomecânicos de flexão até ocorrer a falha. O deslocamento angular (radianos) foi derivado a partir contínua mensuração da largura da fenda com extensometros inseridos ao redor do local da osteotomia. Foram selecionados os dados da fenda da osteotomia a 50 e 100 N.m para comparação padronizada da largura da fenda antes dos pontos de limite elástico e limite de flexão máximo, respectivamente para as 2 técnicas de fixação testadas. Rigidez (N.m/radiano), limite elástico (N.m) e limite de flexão máximo (N.m) foram determinados a partir das curvas de deslocamento angular da flexão e foram comparadas por meio do teste estatístico ANOVA com testes adicionais quando indicado. Foram obtidas imagens radiográficas pré fixação das mandíbulas. Os dentes submetidos à implantes transdentários foram submetidos à exames tomográficos e foram obtidos cortes histológicos calcificados. As cargas de resistência à flexão, de limite elástico e de limite de flexão máximo foram maiores nas mandíbulas intactas. Nas mandíbulas osteotomizadas as cargas de resistência à flexão, de limite elástico, de limite de flexão máximo e da largura da osteotomia à 50 e 100 N.m não foram significantemente diferentes (P>0,05) nas fixações com placas LCP e implantes transdentários com placas LC-DCP. Estas técnicas foram biomecânicamente similares. A fixação com placas LCP transdentários com placas LC-DCP são uma forma estável de fixação de fraturas localizadas no diastema mandibular. Em alguns casos, a cavidade pulpar (71% em dentes incisivos e 43% em dentes pré molares) foi penetrada pelos implantes transdentários. Estudos adicionais com animais vivos devem ser realizados para determinar as consequências a longo prazo do uso de implantes transdentários.<br>Mandibular fractures of the interdental space are surgically more demanding because they are often bilateral, unstable, and heavily contaminated. Because each fracture is unique, knowledge of the different repair techniques will allow the practitioner to choose a repair method best suited to the fracture configuration, equipment available, and the skill level and preferences of the surgeon. The aim of this study was to evaluate 2 fixation techniques for equine interdental space fractures by mensuration their biomechanical characteristics. Mandibles with interdental osteotomies were divided into 2 fixation groups (n = 8/group). Fixation techniques were the locking compression plates (LCP) and (2) Trans-Dental low contact - dynamic compression-plate fixation (Trans dental LC-DCP). Eight intact (nonosteotomized) mandibles were tested as controls. Mandibles were subjected to monotonic cantilever bending until failure. Angular displacement data (radians) were derived from continuously recorded gap width measurements provided by extensometers placed across the osteotomy site. Osteotomy gap width data (mm) at 50 and 100 Nm were selected for standardized comparison of gap width before the yield point and failure point, respectively of all constructs tested. Stiffness (Nm/radian), yield strength (Nm), and failure strength (Nm) were determined from bending moment-angular displacement curves and were compared using ANOVA with appropriate post hoc testing when indicated. Radiographs were obtained prefixation. Axial tomography and calcified histological cuts were obtained of the teeth submited to trans dental screws implant. Bending stiffness, yield, and ultimate failure loads were greatest for intact mandibles. Among osteotomized mandibles, stiffness, yield, ultimate faluire, and osteotomy gap width at 50 and 100 Nm was not significantly different (P>0,05) among LCP and trans dental LC-DCP constructs. They were biomechanically similar. LCP and trans dental LC-DCP fixation are stable form of fixation for interdental space fractures. In some cases the pulp cavity was penetrated (incisors teeth, 71% and check teeth, 43%) by trans dental implants. Additional studies with live animals must be performed to determine the long term consequences of adhibition the trans dental implants.
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Macedo, Aline Schafrum [UNESP]. "Ex vivo torsional properties of the Targon Vet Nail System in canine femurs: comparison with the 2.4 mm LC-DCP Plate." Universidade Estadual Paulista (UNESP), 2015. http://hdl.handle.net/11449/136785.

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Made available in DSpace on 2016-04-01T17:55:16Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-11-06. Added 1 bitstream(s) on 2016-04-01T18:01:16Z : No. of bitstreams: 1 000860220_20161106.pdf: 556437 bytes, checksum: 3c96ed4a04c279bd31703c745a8e4a75 (MD5) Bitstreams deleted on 2016-11-07T12:49:32Z: 000860220_20161106.pdf,. Added 1 bitstream(s) on 2016-11-07T12:50:07Z : No. of bitstreams: 1 000860220.pdf: 2313040 bytes, checksum: 7a69e068a89b4dd606af51efe7feb1d1 (MD5)<br>O objetivo desse trabalho foi avaliar a estabilidade torsional do sistema Targon Vet Nail (TVS) de 2,5 mm em fêmures de cães pequenos e estudar o efeito de diferentes localizações dos bolts na força torsional das construções, comparadas a placas de baixo contato Low Contact - Dynamic Compression Plate (LC-DCP®) de 2,4 mm. Trinta e seis fêmures foram obtidos de cadáveres frescos de cães pequenos e alocados em 3 grupos (n = 12), assegurando distribuição de comprimento do osso igual entre os grupos. Em todos os ossos, o ponto 1 mm abaixo do trocânter menor e outro 1 mm acima das fabelas foram marcados e uma osteotomia transversa foi realizada equidistante a essas marcações, na diáfise. No grupo 1, o osso foi fixado com o TVS de 2,5 mm com os parafusos aplicados nessas marcas pré- identificadas, deixando um espaço de 2 mm entre os fragmentos. No grupo 2, o sistema TVS também foi utilizado, mas o parafuso proximal foi colocado num local equidistante entre a marcação e a osteotomia proximal, resultando em uma distância entre os parafusos 25% mais curta. No grupo 3, placas LC-DCP® de 2,4 mm e 7 orifícios foram aplicadas à face lateral dos ossos. Todas as construções foram testadas de forma não destrutiva a uma taxa de 1ᵒ/s sob torque controlado de mais e menos 0,57 Nm durante 10 ciclos. O teste cíclico foi seguido por uma torção aguda até ocorrer falha. O último dos 10 ciclos foi usado para medir a deformação sob carga não-destrutiva. A rigidez e torque até falha foram medidos a partir das curvas finais de torque-deformação. O limite elástico foi definido como uma deformação de 1° para além do comportamento linear esperado das construções. Todos os resultados foram testados quanto à normalidade e comparados utilizando análise de variância e teste post hoc de Tukey. Valores de P < 0,05 foram considerados significativos. Torque máximo +/- desvio padrão foi 0,806 +/- 0,183 e 0,805 +/- 0,093 Nm para...<br>The purpose of this study was to evaluate the torsional stability of the Targon® Vet Nail System (TVS) in small canine femurs and to study the effect of different bolt locations on the torsional strength of the constructs compared to 2.4 mm Low Contact - Dynamic Compression Plates (LC-DCP®). Thirty-six femurs were harvested from fresh small dog cadavers and allocated to 3 groups (n=12) ensuring equal bone length distribution between groups. In all bones, points 1 mm below the lesser trochanter and 1 mm above the fabellae were marked and a transverse osteotomy was performed in the middle. In group 1, the bone was fixed with the 2.5 mm TVS with the bolts applied at those pre-identified marks, leaving a 2 mm gap between fragments. In group 2, the TVS was also used but the proximal bolt was placed in a location equidistant between the proximal mark and the osteotomy, resulting in a 25% shorter inter-bolt distance. In group 3, 7-hole 2.4 mm LC-DCP® plates were applied to the lateral aspect of the bones. All constructs were tested non-destructively at a rate of 1°/sec under load control between a torque of plus and minus 0.57 Nm for 10 cycles. Cyclic loading was followed by an acute torsion to failure. The last of the 10 cycles was used to measure the deformation under non-destructive load. The stiffness and torque to failure of the constructs were measured from the final torque-deformation curves. Yield point was defined as a 1° deformation beyond the expected linear behavior of the constructs. All results were tested for normality and compared using ANOVA and Tukey post hoc tests. P values < 0.05 were considered significant. Torque at yield was 0.806 +/- 0.183 and 0.805 +/- 0.093 Nm for groups 1 and 2 and 1.737 +/- 0.461 Nm for group 3. Stiffness was 0.05 +/- 0.01; 0.05 +/- 0.007 and 0.14 +/- 0.015 Nm/° for groups 1 to 3 respectively. Displacement under cyclic loading was 16.6° +/- 2.5°; 15.6° +/- 2.1° and ...
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Macedo, Aline Schafrum. "Ex vivo torsional properties of the Targon Vet Nail System in canine femurs : comparison with the 2.4 mm LC-DCP Plate /." Jaboticabal, 2015. http://hdl.handle.net/11449/136785.

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Orientador: Bruno Watanabe Minto<br>Banca: André Escobar<br>Banca: André Luís Selmi<br>Resumo: O objetivo desse trabalho foi avaliar a estabilidade torsional do sistema Targon Vet Nail (TVS) de 2,5 mm em fêmures de cães pequenos e estudar o efeito de diferentes localizações dos bolts na força torsional das construções, comparadas a placas de baixo contato Low Contact - Dynamic Compression Plate (LC-DCP®) de 2,4 mm. Trinta e seis fêmures foram obtidos de cadáveres frescos de cães pequenos e alocados em 3 grupos (n = 12), assegurando distribuição de comprimento do osso igual entre os grupos. Em todos os ossos, o ponto 1 mm abaixo do trocânter menor e outro 1 mm acima das fabelas foram marcados e uma osteotomia transversa foi realizada equidistante a essas marcações, na diáfise. No grupo 1, o osso foi fixado com o TVS de 2,5 mm com os parafusos aplicados nessas marcas pré- identificadas, deixando um espaço de 2 mm entre os fragmentos. No grupo 2, o sistema TVS também foi utilizado, mas o parafuso proximal foi colocado num local equidistante entre a marcação e a osteotomia proximal, resultando em uma distância entre os parafusos 25% mais curta. No grupo 3, placas LC-DCP® de 2,4 mm e 7 orifícios foram aplicadas à face lateral dos ossos. Todas as construções foram testadas de forma não destrutiva a uma taxa de 1ᵒ/s sob torque controlado de mais e menos 0,57 Nm durante 10 ciclos. O teste cíclico foi seguido por uma torção aguda até ocorrer falha. O último dos 10 ciclos foi usado para medir a deformação sob carga não-destrutiva. A rigidez e torque até falha foram medidos a partir das curvas finais de torque-deformação. O limite elástico foi definido como uma deformação de 1° para além do comportamento linear esperado das construções. Todos os resultados foram testados quanto à normalidade e comparados utilizando análise de variância e teste post hoc de Tukey. Valores de P < 0,05 foram considerados significativos. Torque máximo +/- desvio padrão foi 0,806 +/- 0,183 e 0,805 +/- 0,093 Nm para...<br>Abstract: The purpose of this study was to evaluate the torsional stability of the Targon® Vet Nail System (TVS) in small canine femurs and to study the effect of different bolt locations on the torsional strength of the constructs compared to 2.4 mm Low Contact - Dynamic Compression Plates (LC-DCP®). Thirty-six femurs were harvested from fresh small dog cadavers and allocated to 3 groups (n=12) ensuring equal bone length distribution between groups. In all bones, points 1 mm below the lesser trochanter and 1 mm above the fabellae were marked and a transverse osteotomy was performed in the middle. In group 1, the bone was fixed with the 2.5 mm TVS with the bolts applied at those pre-identified marks, leaving a 2 mm gap between fragments. In group 2, the TVS was also used but the proximal bolt was placed in a location equidistant between the proximal mark and the osteotomy, resulting in a 25% shorter inter-bolt distance. In group 3, 7-hole 2.4 mm LC-DCP® plates were applied to the lateral aspect of the bones. All constructs were tested non-destructively at a rate of 1°/sec under load control between a torque of plus and minus 0.57 Nm for 10 cycles. Cyclic loading was followed by an acute torsion to failure. The last of the 10 cycles was used to measure the deformation under non-destructive load. The stiffness and torque to failure of the constructs were measured from the final torque-deformation curves. Yield point was defined as a 1° deformation beyond the expected linear behavior of the constructs. All results were tested for normality and compared using ANOVA and Tukey post hoc tests. P values < 0.05 were considered significant. Torque at yield was 0.806 +/- 0.183 and 0.805 +/- 0.093 Nm for groups 1 and 2 and 1.737 +/- 0.461 Nm for group 3. Stiffness was 0.05 +/- 0.01; 0.05 +/- 0.007 and 0.14 +/- 0.015 Nm/° for groups 1 to 3 respectively. Displacement under cyclic loading was 16.6° +/- 2.5°; 15.6° +/- 2.1° and ...<br>Mestre
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Book chapters on the topic "LC-DCP plate"

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Daniaux, H., A. Kathrein, A. Genelin, T. Lang, P. Seykora, and E. Beck. "Erste Ergebnisse in der Behandlung von Schaftfrakturen mit der LC-DCP (Limited Contact-Dynamic Compression Plate)." In Hefte zur Zeitschrift „Der Unfallchirurg“. Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-78055-4_181.

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2

Perren, S. M., K. Klaue, and E. Gautier. "Die Limited-Contact-DC-Platte (LC-DCP), Konzept und wissenschaftliche Grundlage." In Hefte zur Zeitschrift „Der Unfallchirurg“. Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-78055-4_180.

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