To see the other types of publications on this topic, follow the link: Fragment specific fixation.

Journal articles on the topic 'Fragment specific fixation'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Fragment specific fixation.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Hozack, Bryan A., and Rick J. Tosti. "Fragment-Specific Fixation in Distal Radius Fractures." Current Reviews in Musculoskeletal Medicine 12, no. 2 (2019): 190–97. http://dx.doi.org/10.1007/s12178-019-09538-6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Medoff, Robert J. "Fragment-Specific Fixation of Distal Radius Fractures." Atlas of the Hand Clinics 11, no. 2 (2006): 163–74. https://doi.org/10.1016/j.ahc.2006.06.004.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Lee, Steve K., and Sonia Chaudhry. "Open Reduction and Internal Fixation Through Fracture Fragment Specific Fixation Methods." Operative Techniques in Orthopaedics 19, no. 2 (2009): 70–76. http://dx.doi.org/10.1053/j.oto.2009.09.011.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Bilinsky, P. I., V. P. But, and T. E. Marthuk. "Limited contact multiplane osteosynthesis of shinbone fractures." Paediatric Surgery. Ukraine, no. 3(84) (September 28, 2024): 95–98. https://doi.org/10.15574/ps.2024.3(84).9598.

Full text
Abstract:
Aim - to improve the results of treatment of shinbone fractures with limited contact multiplane osteosynthesis device, to investigate its fixation capabilities. Materials and methods. On the base of systemic approach, conceptual substantiation, theoretic methods of mathematic and computer modeling a new method of limited contact multiplane osteosynthesis of diaphyseal shinbone fractures (SBF) and device for its realization were developed. Comparative analysis of fixing capabilities of the developed device and full-contact plate was performed by means of finite element method. Stress-strain state of the “fixative-bone” system of different fixation methods of SBF was investigated. Results. Theoretic data about the size of the micromobility of bone fragments depending on the fracture line pattern, imposed force, specific features of the fixative construction were obtained. Stressed state of plates, its dependence from fixative construction, fracture pattern, load size was studied. Influence of reposition stabilization of fragments by screws in oblique and comminuted fractures on fixation rigidity, micromotion of fragments, stress of fixative construction elements and bone fragments was investigated. Fragment fusion was noted in all 380 patients with SBF operated on with a limited contact osteosynthesis device. Conclusions. The developed device for limited contact multiplane osteosynthesis of shinbone fractures and the method of its application simplifies surgical intervention, minimises trauma to the fragments, and ensures their stable fixation and optimal conditions for fusion. No conflict of interest was declared by the authors.
APA, Harvard, Vancouver, ISO, and other styles
5

Mahajan, Rahul, Nitin Choudhary, Sanjeev Gupta, and Neeraj Mahajan. "TRIMALLEOLARFRACTURES :- FRAGMENT SPECIFIC FIXATION AND ITS FUNCTIONAL OUTCOMES." International Journal of Advanced Research 10, no. 05 (2022): 1295–300. http://dx.doi.org/10.21474/ijar01/14849.

Full text
Abstract:
Trimalleolar fractures are disabling injuries if not managed properly. Clinical and functional outcomes oftrimalleolar fracture are worse as compared to bimalleolar fractures not involving the posterior malleolus. Various surgical approaches and techniques to reduce and fix these fractures described in the literature.In this case study of 11 patients with trimalleolar fractures, a posterolateral approach was used for fixation of posterior malleolus as well as lateral malleolus in all the cases. A preoperative CT scan was done in all the cases. The Olerud and Molendar scoring system was used to assess the functional outcome.The average age of patients was 52.6 years. The most common mode of sustaining injury was twisting of the ankle joint (n = 7). The average time to union and full weight-bearing was 12 weeks (range 10–14 weeks). An excellent functional outcome in 6 patients and a good outcome in 5 patients were obtained at the end of 12 months of follow-up. No significant complications were encountered. The posterolateral approach provides good exposure to fix both posterior and lateral malleolus via single incision. Stable fixation of posterior malleolus plays a vital role in obtaining good clinical and functional outcomes.
APA, Harvard, Vancouver, ISO, and other styles
6

Bae, Donald S., and Mark J. Koris. "Fragment-Specific Internal Fixation of Distal Radius Fractures." Hand Clinics 21, no. 3 (2005): 355–62. http://dx.doi.org/10.1016/j.hcl.2005.04.007.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Santosh, Veershetty Patil, Madan Mohan Rao GV, and Sagare Kavyashree. "Fragment Specific Fracture Fixation in the Management of Communited Intra Articular Distal Radius Fractures: An Assessment of Functional Outcome." International Journal of Current Pharmaceutical Review and Research 14, no. 04 (2022): 163–69. https://doi.org/10.5281/zenodo.12657942.

Full text
Abstract:
Introduction: Distal radius fractures are typical high energy trauma injuries, and theirtreatment is impacted by parameters such as fracture stability, displacement, and patientcharacteristics. Fragment-specific fixation can be an effective treatment option for distalradius fractures. The purpose of this study was to assess the therapy of communited intraarticular distal radius fractures using a fragment specific fracture fixation approach.Material and Methods: Thirty-one cases with communited distal radius fractures above 21years of age were recruited. Based on Medoff fracture classification, all the fractures weretreated with fragment specific fracture fixation. Postoperative follow up was conducted onthe end of 3rd week, 6th week, 3rd month, 6th month and end of 12th month and then until thecomplete closure of fractures. The functional outcome of fracture was assessed by Gartlandand Werley scoring system.Results: Majority cases had fracture union duration 8 weeks (54.84%) followed by 10 weeks(32.26%). According to Gartland and Werley score, 70.96% had score 0, 9.68% had score 2,6.45% had core 3 and score 4. The excellent (0-2) functional outcome was observed in90.32%, good (3-8) in 6.45% and fair (9-20) in 3.23% of cases.Conclusion: Fragment specific fracture fixation was an efficient treatment modality forCommunited intraarticular distal radius fractures.
APA, Harvard, Vancouver, ISO, and other styles
8

O’Shaughnessy, Maureen A., Alexander Y. Shin, and Sanjeev Kakar. "Volar Marginal Rim Fracture Fixation With Volar Fragment-Specific Hook Plate Fixation." Journal of Hand Surgery 40, no. 8 (2015): 1563–70. http://dx.doi.org/10.1016/j.jhsa.2015.04.021.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Cheah, A. "Volar Marginal Rim Fracture Fixation With Volar Fragment-Specific Hook Plate Fixation." Yearbook of Hand and Upper Limb Surgery 2016 (2016): 234–36. https://doi.org/10.1016/j.yhls.2016.04.068.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Clark, Sonja, and William Geissler. "Fragment-Specific Fixation for Fractures of the Distal Radius." Journal of Wrist Surgery 05, no. 01 (2016): 022–30. http://dx.doi.org/10.1055/s-0035-1571186.

Full text
APA, Harvard, Vancouver, ISO, and other styles
11

Santosh, Veershetty Patil, Madan Mohan Rao GV, and Sagare Kavyashree. "Fragment Specific Fracture Fixation in the Management of Communited Intra Articular Distal Radius Fractures: An Assessment of Functional Outcome." International Journal of Current Pharmaceutical Review and Research 14, no. 4 (2022): 163–69. https://doi.org/10.5281/zenodo.8168128.

Full text
Abstract:
<strong>Introduction: </strong>Distal radius fractures are typical high energy trauma injuries, and their treatment is impacted by parameters such as fracture stability, displacement, and patient characteristics. Fragment-specific fixation can be an effective treatment option for distal radius fractures. The purpose of this study was to assess the therapy of communited intra articular distal radius fractures using a fragment specific fracture fixation approach. <strong>Material and Methods:</strong> Thirty-one cases with communited distal radius fractures above 21 years of age were recruited. Based on Medoff fracture classification, all the fractures were treated with fragment specific fracture fixation. Postoperative follow up was conducted on the end of 3<sup>rd</sup> week, 6<sup>th</sup> week, 3<sup>rd</sup> month, 6<sup>th</sup> month and end of 12<sup>th</sup> month and then until the complete closure of fractures. The functional outcome of fracture was assessed by Gartland and Werley scoring system. <strong>Results: </strong>Majority cases had fracture union duration 8 weeks (54.84%) followed by 10 weeks (32.26%). According to Gartland and Werley score, 70.96% had score 0, 9.68% had score 2, 6.45% had core 3 and score 4. The excellent (0-2) functional outcome was observed in 90.32%, good (3-8) in 6.45% and fair (9-20) in 3.23% of cases. <strong>Conclusion: </strong>Fragment specific fracture fixation was an efficient treatment modality for Communited intraarticular distal radius fractures.
APA, Harvard, Vancouver, ISO, and other styles
12

Nair, Vinod, Swaroop Solunke, Rishabh Aggarwal, and Shirsha Ray. "Fragment-specific Plate Fixation in a Case of Mayo Type IIB Olecranon Fracture: A Case Report." Journal of Orthopaedic Case Reports 15, no. 1 (2025): 13–16. https://doi.org/10.13107/jocr.2025.v15.i01.5106.

Full text
Abstract:
Introduction: Olecranon fractures account for 5–7% of elbow fractures, making them a common injury. The majority of these fractures are treated surgically because they are intra-articular and can disrupt the elbow extensor mechanism. Mayo Type II fractures are displaced with a stable ulnohumeral joint, indicating intact ligamentous structures, particularly the anterior portion of the medial collateral ligament. Case Report: In our case report, a male in his 20’s came to the outpatient department with complaints of pain in the right elbow since 1 day following a fall from a bike. He also reported that he was unable to fully extend his right elbow. After a plain radiograph, a right displaced comminuted olecranon fracture was suggested. He underwent a pre-anesthesia checkup and standard laboratory testing before being taken for surgery. Open reduction internal fixation with fragment-specific plates was done. An above-elbow slab in the extended position was applied post-surgery and continued for 14 days. Elbow range of motion physiotherapy was started in accordance with tolerance, and the patient responded favorably to surgery. Conclusion: To effectively categorize olecranon fractures according to displacement, comminution, and stability, the Mayo classification was developed. With appropriate computed tomography scan imaging and pre-operative planning, individual fragments of these comminuted fractures can be delineated, and fragment-specific implants can be used, resulting in good radiological and clinical outcome with minimal complications as compared to tension band wiring. Keywords: Olecranon fracture, fragment-specific plate fixation, elbow trauma, absolute fixation, mayo classification.
APA, Harvard, Vancouver, ISO, and other styles
13

ÇETİN, Mehmet Ümit, Abdulkadir POLAT, and Fırat FİDAN. "Orta kolonu ilgilendiren distal radius kırıklarında artroskopik destekli fragman spesifik fiksasyon standart volar plak ile fiksasyona göre üstün müdür?" Cukurova Medical Journal 47, no. 3 (2022): 996–1004. http://dx.doi.org/10.17826/cumj.1087119.

Full text
Abstract:
Purpose: In this study, the clinical and radiological results of volar plating and arthroscopic intervention-assisted fragment-specific fixation techniques used in patients operated for AO Type B-C distal radius fracture in which the medial colon is affected were compared.&#x0D; Materials and Methods: X-ray and clinical records of 98 patients who underwent surgical treatment for radius distal end (DER) fracture between April 2011 and January 2017. The patient groups treated with arthroscopy-assisted fragment-oriented fixation (Group A) and plate screw fixation with a volar approach without arthroscopic intervention (Group B) were compared in terms of joint range of motion, grip strength, and clinical scores. Flexion and extension, ulnar deviation, radial deviation, pronation, and supination angles measured with a standard goniometer were recorded in the joint range of motion measurement. Grip strength was measured with a Jamar dynamometer for power measurement. DASH score was used in clinical evaluation.&#x0D; Results: When the operated wrists of both patient groups were compared, there was no significant difference between the DASH score, grip strength, palmar flexion, and pronation angles of motion. A statistically significant difference was observed between the mean dorsiflexion angles of 55 degrees in group A and 44 degrees in group B, mean radial deviation angles of 25 and 19 degrees, and the mean supination angles of 87 and 80 degrees, respectively.&#x0D; Conclusion: Although arthroscopic-assisted fragment-specific fixation is technically a laborious procedure that requires a learning curve in patients with intra-articular distal radius fractures, it may be beneficial to provide better postoperative results, especially in young patients with high range of motion expectations.
APA, Harvard, Vancouver, ISO, and other styles
14

Schnall, Stephen B., Bill J. Kim, Antonio Abramo, and Philippe Kopylov. "Fixation of Distal Radius Fractures Using a Fragment-specific System." Clinical Orthopaedics and Related Research 445 (April 2006): 51–57. http://dx.doi.org/10.1097/01.blo.0000205900.05986.a3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
15

Schumer, Evan D., and Bruce M. Leslie. "Fragment-Specific Fixation of Distal Radius Fractures Using the Trimed Device." Techniques in Hand & Upper Extremity Surgery 9, no. 2 (2005): 74–83. http://dx.doi.org/10.1097/01.bth.0000158974.15897.1b.

Full text
APA, Harvard, Vancouver, ISO, and other styles
16

Biondi, Marco, Marco Keller, Letizia Merenghi, Markus Gabl, and Giulio Lauri. "Hook Plate for Volar Rim Fractures of the Distal Radius: Review of the First 23 Cases and Focus on Dorsal Radiocarpal Dislocation." Journal of Wrist Surgery 08, no. 02 (2018): 093–99. http://dx.doi.org/10.1055/s-0038-1667306.

Full text
Abstract:
Background Fragment-specific fixation of the distal radius is born to fix each articular fragment with limited surgical approach and low-profile devices. Over time, many devices with different designs and characteristics have been developed. However, many of them have showed the inability to securely fix marginal, small, and comminuted fragments as bony ligament avulsions and bony compression injuries. Purpose The purpose of this study was to evaluate the clinical and radiological outcome of a new device born to treat marginal articular fractures of the distal radius. Patients and Methods A retrospective review was conducted on 23 patients with a mean follow-up of 21 months including postoperative clinical evaluation, grip strength, computed tomography scan, and X-ray control. Results All fragments healed and maintained reduced until the final follow-up. The carpus was aligned with the distal radius in all patients presenting with a radiocarpal dislocation. Conclusion The volar rim fragment is an attachment site for the short radiolunate and the volar distal radioulnar ligament. Its unstable fixation can lead to articular incongruity, volar or dorsal subluxation of the carpus, and distal radioulnar instability. The involvement of this fragment on distal radius fractures is relatively common and many studies of the literature have been focused on its treatment. The Hook Plate stabilizes distal fragments at their bone–ligament interface. In addition to bony reduction, the device permits to stabilize the capsule and ligaments, as volar bony ligament avulsions, in a picture of dorsal radiocarpal dislocation. Level of Evidence This is a Level IV, case series.
APA, Harvard, Vancouver, ISO, and other styles
17

Dodds, Seth D., Simon Cornelissen, Subir Jossan, and Scott W. Wolfe. "A biomechanical comparison of fragment-specific fixation and augmented external fixation for intra-articular distal radius fractures." Journal of Hand Surgery 27, no. 6 (2002): 953–64. http://dx.doi.org/10.1053/jhsu.2002.35897.

Full text
APA, Harvard, Vancouver, ISO, and other styles
18

Lima, Ana Lécia Carneiro Leão de Araújo, Alex Eduardo Calderon Irusta, Alexandre Martins Portelinha, et al. "SPRING PLATES IN DISTAL RADIO FRACTURES: “IN VITRO” MECHANICAL PROPERTIES." Acta Ortopédica Brasileira 26, no. 6 (2018): 423–27. http://dx.doi.org/10.1590/1413-785220182606190551.

Full text
Abstract:
ABSTRACT Background: Distal radius fractures are one of the most common orthopedic injuries and appear in various patterns. Volar plate fixation is not always considered the gold standard treatment. Objective: To measure the resistance of a fragment-specific fixation assembly model obtained by plate fixation associated with different K-wire sizes. Method: In this original experimental study, novel II, axial compression of bone materials was tested. Results: In both groups, the maximum force supported by the fixation method in our study was ten times greater than the physiological load to which the wrist was subjected under physiological conditions. Discussion: In this study, we obtained encouraging results when compared to results reported in the literature. Our study showed that our bone fixating system was mechanically adequate for articular fractures of the intermediate column of the radius (Melone classification). The results were similar or superior to the results of pressure resistance and stiffness when data from the literature was used as reference. Conclusion: The proposed fixation method demonstrated adequate resistance for fixation of the intermediate column of the distal radius. Increasing K wire size caused augmented resistance of the fixation. Level of Evidence II, Prospective comparative study.
APA, Harvard, Vancouver, ISO, and other styles
19

Benson, Leon S., Keith P. Minihane, Laura D. Stern, Erik Eller, and Roopa Seshadri. "The Outcome of Intra-Articular Distal Radius Fractures Treated With Fragment-Specific Fixation." Journal of Hand Surgery 31, no. 8 (2006): 1333–39. http://dx.doi.org/10.1016/j.jhsa.2006.07.004.

Full text
APA, Harvard, Vancouver, ISO, and other styles
20

Gupta, Sandeep, Jagandeep Singh Virk, Anubhav Malhotra, and Sudhir Kumar Garg. "Fragment-specific fixation of trimalleolar fractures utilizing the posterolateral approach: A preliminary experience." Journal of Orthopaedic Surgery 27, no. 2 (2019): 230949901984228. http://dx.doi.org/10.1177/2309499019842289.

Full text
APA, Harvard, Vancouver, ISO, and other styles
21

O'Shaughnessy, Maureen A., Sanjeev Kakar, and Alexander Y. Shin. "Outcomes Following Use of Volar Hook Plate in Fragment Specific Distal Radius Fixation." Journal of Hand Surgery 39, no. 9 (2014): e8. http://dx.doi.org/10.1016/j.jhsa.2014.06.036.

Full text
APA, Harvard, Vancouver, ISO, and other styles
22

SAW, N., C. ROBERTS, K. CUTBUSH, M. HODDER, G. COUZENS, and M. ROSS. "EARLY EXPERIENCE WITH THE TRIMED FRAGMENT-SPECIFIC FRACTURE FIXATION SYSTEM IN INTRAARTICULAR DISTAL RADIUS FRACTURES." Journal of Hand Surgery (European Volume) 33, no. 1 (2008): 53–58. http://dx.doi.org/10.1177/1753193407087887.

Full text
Abstract:
This paper reports the results of fixation of intraarticular fractures of the distal radius using the TriMed fragment-specific fixation system by surgeons early in their experience with the system. A consecutive series of 22 AO types C2 and C3 fractures in 21 patients were internally fixed with the system. Restoration of articular congruity to less than 2 mm was possible in 20 fractures. At a minimum of 6 months follow-up, mean volar and radial inclination were 8° and 25°, respectively, with no loss of reduction. The patients had a mean of 50° flexion, 63° extension and a pronation–supination arc of 149°. The mean subjective Patient Rated Wrist Score was 20. Our complication rate was comparable to other published series despite long operating times. Therefore, we commend the system as a powerful tool to treat these difficult fractures but acknowledge the significant learning curve.
APA, Harvard, Vancouver, ISO, and other styles
23

Abdelgaid, Sherif Mohamed, Mokhtar Elsayed Abdelazeem, and Walid Alsharkawy. "Fragment-specific fixation of complex distal radial fractures with small intraarticular fragments; volar locked plate augmented with Kirschner wires." Current Orthopaedic Practice 26, no. 3 (2015): 306–13. http://dx.doi.org/10.1097/bco.0000000000000224.

Full text
APA, Harvard, Vancouver, ISO, and other styles
24

Bashiruddin, J. B., T. K. Taylor, and A. R. Gould. "A PCR-based Test for the Specific Identification of Mycoplasma Mycoides Subspecies mycoides SC." Journal of Veterinary Diagnostic Investigation 6, no. 4 (1994): 428–34. http://dx.doi.org/10.1177/104063879400600405.

Full text
Abstract:
The polymerase chain reaction (PCR) was used to develop a test for the detection of Mycoplasma mycoides subspecies mycoides SC in the tissues of animals infected with contagious bovine pleuropneumonia (CBPP). Two sets of primers were designed; one set (MC323/MC358) to amplify a ∼1.5-kbp DNA fragment from all the members of the M. mycoides ‘Cluster’ and the other set (MM450/MM451) specifically amplified a 574-bp DNA fragment from M. mycoides subspecies. The PCR products could be differentiated further by digestion with the restriction enzyme AsnI. Enzyme digestion of amplification products from M. m. mycoides SC produced 2 fragments, whereas the other 2 M. mycoides subspecies, M. m. mycoides LC and M. m. capri, produced 3 fragments. This test was shown to be very sensitive, being able to detect between 10 and 100 organisms. Cattle were experimentally infected with the Gladysdale strain of M. m. mycoides SC, and samples of serum and mucus were taken periodically, as were postmortem samples of lung, lymph node, pleural fluid, synovial fluid, and tracheal swabs. Complement fixation test on serum samples, culture of postmortem tissues, and histopathologic examination confirmed disease. DNA was extracted from postmortem samples and amplified by PCR using primers MM450 and MM451. Digestion of products using AsnI allowed the specific identification of M. m. mycoides SC. This test could confirm CBPP in 48 hours and was thus capable of giving a more rapid result than the traditional methods of culture, isolation, and identification using biochemical and serological techniques.
APA, Harvard, Vancouver, ISO, and other styles
25

Turan, Adil, Yusuf Alper Kati, Baver Acar, and Ozkan Kose. "Magnesium Bioabsorbable Screw Fixation of Radial Styloid Fractures: Case Report." Journal of Wrist Surgery 09, no. 02 (2019): 150–55. http://dx.doi.org/10.1055/s-0039-1685489.

Full text
Abstract:
Abstract Background Several types of fixation materials may be used for the radial styloid fractures such as Kirschner wire fixation, screw fixation, volar plate fixation, and fragment-specific radial buttress plate fixation. However, each of these fixation techniques has certain complications usually related to either the surgical dissection or the application of fixation and symptomatic permanent hardware. Implant removal secondary to irritation of prominent screw heads or bulky plates is not uncommon after radial styloid fracture fixation. Case Description Herein, two patients with an isolated radial styloid fracture who were treated with bioabsorbable magnesium (alloy: MgYREZr) screws are presented. In both patients, the fracture union was achieved without any complication and need for implant removal. Literature Review This is the first report on the use of magnesium screws for this indication. Clinical Relevance Magnesium bioabsorbable compression screw fixation may be an alternative solution that eliminates removal operations due to symptomatic hardware in radial styloid fractures.
APA, Harvard, Vancouver, ISO, and other styles
26

Boden, Allison L., Charles A. Daly, Poonam P. Dalwadi, et al. "Biomechanical Evaluation of Standard Versus Extended Proximal Fixation Olecranon Plates for Fixation of Olecranon Fractures." HAND 14, no. 4 (2018): 554–59. http://dx.doi.org/10.1177/1558944717753206.

Full text
Abstract:
Background: Small olecranon fractures present a significant challenge for fixation, which has resulted in development of plates with proximal extension. Olecranon-specific plates with proximal extensions are widely thought to offer superior fixation of small proximal fragments but have distinct disadvantages: larger dissection, increased hardware prominence, and the increased possibility of impingement. Previous biomechanical studies of olecranon fracture fixation have compared methods of fracture fixation, but to date there have been no studies defining olecranon plate fixation strength for standard versus extended olecranon plates. The purpose of this study is to evaluate the biomechanical utility of the extended plate for treatment of olecranon fractures. Methods: Sixteen matched pairs of fresh-frozen human cadaveric elbows were used. Of the 16, 8 matched pairs received a transverse osteotomy including 25% and 8 including 50% of the articular surface on the proximal fragment. One elbow from each pair was randomly assigned to a standard-length plate, and the other elbow in the pair received the extended-length plate, for fixation of the fracture. The ulnae were cyclically loaded and subsequently loaded to failure, with ultimate load, number of cycles, and gap formation recorded. Results: There was no statistically significant difference between the standard and extended fixation plates in simple transverse fractures at either 25% or 50% from the proximal most portion of the articular surface of the olecranon. Conclusion: Standard fixation plates are sufficient for the fixation of small transverse fractures, but caution should be utilized particularly with comminution and nontransverse fracture patterns.
APA, Harvard, Vancouver, ISO, and other styles
27

Khalil, Mohammed Raafat, Abdelsalam Eid Abdelsalam,, Mohamed Mansour Elzohairy, and Ahmed Mashhour Gaber. "The Results of Fragment-Specific Fixation for Treatment of Intra-Articular Distal Radius Fractures." Egyptian Journal of Hospital Medicine 88, no. 1 (2022): 2891–96. http://dx.doi.org/10.21608/ejhm.2022.242768.

Full text
APA, Harvard, Vancouver, ISO, and other styles
28

Sammer, Douglas M., Douglas S. Fuller, Hyungjin Myra Kim, and Kevin C. Chung. "A Comparative Study of Fragment-Specific versus Volar Plate Fixation of Distal Radius Fractures." Plastic and Reconstructive Surgery 122, no. 5 (2008): 1441–50. http://dx.doi.org/10.1097/prs.0b013e3181891677.

Full text
APA, Harvard, Vancouver, ISO, and other styles
29

Mekhemar, Ahmed, Adel Abd El-Aziz, Mohammed Shafie, Ahmed Othman, and Assem Noureldin Zein. "Fragment Specific Fixation for Tibial Plateau Fractures with particular reference to arthroscopic assisted surgery." Minia Journal of Medical Research 34, no. 4 (2023): 167–80. http://dx.doi.org/10.21608/mjmr.2024.165098.1190.

Full text
APA, Harvard, Vancouver, ISO, and other styles
30

Babikir, Elhadi Musaab Elhadi, Eyad Daood Al-Maqdassy, Khalid Hasan, Shamsi Abdul Hameed, Abduljabbar Alhammoud, and Mohammed Mubarak Al-Ateeq Al-Dosari. "Efficiency of fragment specific fixation plates in the treatment of comminuted distal radial fractures." International Orthopaedics 41, no. 9 (2017): 1763–69. http://dx.doi.org/10.1007/s00264-017-3516-0.

Full text
APA, Harvard, Vancouver, ISO, and other styles
31

Ganesan, Mohan, and Nirmal Mohan. "FUNCTIONAL OUTCOME OF COMMINUTED INTRAARTICULAR DISTAL RADIUS FRACTURES TREATED WITH FRAGMENT SPECIFIC FRACTURE FIXATION." Journal of Evolution of Medical and Dental Sciences 7, no. 05 (2018): 690–96. http://dx.doi.org/10.14260/jemds/2018/156.

Full text
APA, Harvard, Vancouver, ISO, and other styles
32

Patel, Sandeep, and S. M. Ajoy. "Pilon Fractures: Fragment Specific Fixation and 360° Approaches are the Flavor of the Time." Journal of Foot and Ankle Surgery (Asia Pacific) 11, no. 2 (2024): 51–52. http://dx.doi.org/10.5005/jp-journals-10040-1346.

Full text
APA, Harvard, Vancouver, ISO, and other styles
33

Passi, Deepak, Ritu Gupta, Lokesh Chandra, Abhishek Singh, Prarthana Sharma, and Garima Yadav. "Newer condylar trapezoidal plate in treatment of mandibular condyle fractures : short clinical study." International Journal of Dental Research 5, no. 1 (2017): 52. http://dx.doi.org/10.14419/ijdr.v5i1.7408.

Full text
Abstract:
Mandibular condyle fracture is one of the most frequent injuries of the facial skeleton. The treatment ofmandibular condyle is either closed reduction or open reduction with internal fixation. The open reduction of mandibular condyle fractures has become more favorable and gaining popularity since various osteosynthesis materials and techniques were developed in the past few decades. These include fixation with Kirschner wires, intraosseous wiring, miniplates, and lag screw fixation. In response to a increased number of needs for improved treatment in this region, a variable morphological plates have been developed with specific designs to treat such fractures. We present a case series of use of new condylar trapezoidal plate (condylar fragment plate) in the treatment of mandibular condyle fractures.
APA, Harvard, Vancouver, ISO, and other styles
34

Chang, H. C., S. Y. Poh, S. C. Seah, D. T. C. Chua, B. K. Cha, and C. O. Low. "Fragment-specific fracture fixation and double-column plating of unstable distal radial fractures using AO mini-fragment implants and Kirschner wires." Injury 38, no. 11 (2007): 1259–67. http://dx.doi.org/10.1016/j.injury.2007.03.024.

Full text
APA, Harvard, Vancouver, ISO, and other styles
35

Hill, J. Ryan, Ram K. Alluri, and Alidad Ghiassi. "Acute Isolated Flexor Tendon Laceration Associated With a Distal Radius Fracture." HAND 12, no. 3 (2016): NP39—NP42. http://dx.doi.org/10.1177/1558944716668850.

Full text
Abstract:
Background: Subacute rupture of the flexor tendons secondary to distal radius fractures is well documented. Recently, accounts of flexor tendon rupture following open reduction internal fixation have been associated with volar plate fixation. However, discovery of an occult traumatic flexor tendon laceration during fixation of an acute distal radius fracture is not well described. This case indicates the importance of careful preoperative and intraoperative examination of the flexor tendons in the setting of comminuted distal radius fractures. Methods: A forty-seven-year-old male sustained a comminuted, dorsally displaced distal radius fracture. Initial and post-reduction examinations revealed no gross functional abnormalities. Upon operative fixation of the fracture, laceration of the flexor digitorum profundus (FDP) tendon to the index finger was incidentally noted at the level of the fracture site. Results: Due to extensive dorsal comminution, shortening, and the presence of a lunate facet fragment, we performed volar fragment-specific and dorsal spanning bridge plate fixation. The proximal and distal ends of the FDP tendon were marked, but repair was deferred until implant removal. This allowed for proper informed consent and avoided potential compromise of the repair given the presence of a volar implant. Conclusions: Acute flexor tendon rupture secondary to closed distal radius fractures may go unnoticed if a high index of suspicion is not maintained. Delayed diagnosis of these ruptures convolutes the mechanism of injury and disrupts the recovery process. Hand surgeons should be vigilant in examining flexor tendon function during the preoperative evaluation, especially in the setting of acute high-energy injury.
APA, Harvard, Vancouver, ISO, and other styles
36

Abramo, Antonio, Marcus Landgren, Mats Geijer, Philippe Kopylov, and Magnus Tägil. "Fragment-Specific Fixation Versus Volar Locking Plates in Primarily Nonreducible or Secondarily Redisplaced Distal Radius Fractures." HAND 11, no. 1_suppl (2016): 43S. http://dx.doi.org/10.1177/1558944716660555bo.

Full text
APA, Harvard, Vancouver, ISO, and other styles
37

Thiart, Mari, and Ajmal Ikram. "Fragment-Specific Fixation of Intra-articular Distal Radius: The Role of Arthroscopy to Confirm Anatomical Reduction." Journal of Hand Surgery 38, no. 10 (2013): e5. http://dx.doi.org/10.1016/j.jhsa.2013.08.010.

Full text
APA, Harvard, Vancouver, ISO, and other styles
38

Shin, Seung-Han, Moo-Sub Kim, Do-Kun Yoon, Jae-Jin Lee, and Yang-Guk Chung. "Does a Customized 3D Printing Plate Based on Virtual Reduction Facilitate the Restoration of Original Anatomy in Fractures?" Journal of Personalized Medicine 12, no. 6 (2022): 927. http://dx.doi.org/10.3390/jpm12060927.

Full text
Abstract:
The purpose of this study was to evaluate the restoration of original anatomy after fixation of sawbone fractures using case-specific 3D printing plates based on virtual reduction (VR). Three-dimensional models of 28 tibia sawbones with cortical marking holes were obtained. The sawbones were fractured at various locations of the shaft and 3D models were obtained. The fractured models were reduced virtually and customized non-locking metal plates that fit the reduced model were produced via 3D printing. The fractured sawbones were actually fixed to the customized plate with nonlocking screws and 3D models were generated. With the proximal fragments of the 3D models overlapped, the changes in length, 3D angulation, and rotation of the distal fragment were evaluated. Compared to the intact model (IN), the virtual reduction model (VR) and the actual fixation model (AF) showed no significant differences in length. Compared to the IN, the VR and the AF had mean 3D angulations of 0.39° and 0.64°, respectively. Compared to the IN model, the VR and the AF showed mean rotations of 0.89° and 1.51°, respectively. A customized plate based on VR facilitates the restoration of near-original anatomy in fractures of tibial sawbone shaft.
APA, Harvard, Vancouver, ISO, and other styles
39

De Oliveira, Felipe Alves. "Bioabsorbable pins at the knee - normal imaging findings and complications." Brazilian Journal of Health Review 7, no. 1 (2024): 5793–804. http://dx.doi.org/10.34119/bjhrv7n1-469.

Full text
Abstract:
The traumatic and non-traumatic osteochondral lesions of the knee can be surgically repaired with osteochondral fragment fixation, and bioabsorbable materials have been facing a strong increase in their use for this purpose in recent years. They have specific biomechanical and biological behavior after implantation, which depict normal and abnormal imaging findings on follow-up diagnostic imaging. This article will discuss these and other imaging findings, important to predict implant failure leading to poor evolution and associated complications.
APA, Harvard, Vancouver, ISO, and other styles
40

Goorens, Chul Ki, Stijn Geeurickx, Pascal Wernaers, Barbara Staelens, Thierry Scheerlinck, and Jean Goubau. "Midterm Follow-up of Treating Volar Marginal Rim Fractures with Variable Angle Lcp Volar Rim Distal Radius Plates." Journal of Hand Surgery (Asian-Pacific Volume) 22, no. 02 (2017): 184–87. http://dx.doi.org/10.1142/s0218810417500228.

Full text
Abstract:
Background: Specific treatment of the volar marginal rim fragment of distal radius fractures avoids occurance of volar radiocarpal dislocation. Although several fixation systems are available to capture this fragment, adequately maintaining internal fixation is difficult. We present our experience of the first 10 cases using the 2.4 mm variable angle LCP volar rim distal radius plate (Depuy Synthes®, West Chester, US), a low-profile volar rim-contouring plate designed for distal plate positioning and stable buttressing of the volar marginal fragment. Methods: Follow-up patient satisfaction, range of motion, grips strength, functional scoring with the QuickDASH and residual pain with a numeric rating scale were assessed. Radiological evaluation consisted in evaluating fracture consolidation, ulnar variance, volar angulation and maintenance of the volar rim fixation. Results: The female to male ratio was 5:5 and the mean age was 52.2 (range, 17–80) years. The mean follow-up period was 11 (range, 5–19) months postoperatively. Patient satisfaction was high. The mean total flexion/extension range was 144° (range, 100–180°) compared to the contralateral uninjured side 160° (range, 95–180°). The mean total pronation/supination range was 153° (range, 140–180°) compared to the contralateral uninjured side 170° (range, 155–180°). Mean grip strength was 14 kg (range, 9–22), compared to the contralateral uninjured side 20 kg (range, 12–25 kg). Mean pre-injury level activity QuickDASH was 23 (range, 0–34.1), while post-recovery QuickDASH was 25 (range 0–43.2). Residual pain was 1.5 on the visual numerical pain rating scale. Radiological evaluation revealed in all cases fracture consolidation, satisfactory reconstruction of ulnar variance, volar angulation and volar rim. We encountered no flexor tendon complications, although plate removal was systematically performed after fracture consolidation. Conclusions: The 2.4 mm variable angle LCP volar rim distal radius plates is a valid treatment option for treating the volar marginal fragment in distal radius fractures.
APA, Harvard, Vancouver, ISO, and other styles
41

van der Gaast, N., J. M. Huitema, L. Brouwers, et al. "TIBIAL PLATEAU FRACTURE CHARACTERISTICS: RELIABILITY AND DIAGNOSTIC ACCURACY OF 3D-PRINTED MODELS." Orthopaedic Proceedings 105-B, SUPP_3 (2023): 37. http://dx.doi.org/10.1302/1358-992x.2023.3.037.

Full text
Abstract:
Classification systems for tibial plateau fractures suffer from poor interobserver agreement, and their value in preoperative assessment to guide surgical fixation strategies is limited. For tibial plateau fractures four major characteristics are identified: lateral split fragment, posteromedial fragment, anterior tubercle fragment, and central zone of comminution. These fracture characteristics support preoperative assessment of fractures and guide surgical decision-making as each specific component requires a respective fixation strategy. We aimed to evaluate the additional value of 3D-printed models for the identification of tibial plateau fracture characteristics in terms of the interobserver agreement on different fracture characteristics.Preoperative images of 40 patients were randomly selected. Nine trauma surgeons, eight senior and eight junior registrars indicated the presence or absence of four fracture characteristics with and without 3D-printed models. The Fleiss kappa was used to determine interobserver agreement for fracture classification and for interpretation, the Landis and Koch criteria were used.3D-printed models lead to a categorical improvement in interobserver agreement for three of four fracture characteristics: lateral split (Kconv = 0.445 versus K3Dprint = 0.620; P &lt; 0.001), anterior tubercle fragment (Kconv = 0.288 versus K3Dprint = 0.449; P &lt; 0.001) and zone of comminution (Kconv = 0.535 versus K3Dprint = 0.652; P &lt; 0.001).The overall interobserver agreement improved for three of four fracture characteristics after the addition of 3D printed models. For two fracture characteristics, lateral split and zone of comminution, a substantial interobserver agreement was achieved.Fracture characteristics seem to be a more reliable way to assess tibial plateau fractures and one should consider including these in the preoperative assessment of tibial plateau fractures compared to the commonly used classification systems.
APA, Harvard, Vancouver, ISO, and other styles
42

Ford, Samuel E., and J. Kent Ellington. "Management of Distal Tibial Metaphyseal Bone Defects With an Intramedullary Nitinol Scaffold: A Novel Technique." Foot & Ankle Specialist 10, no. 4 (2016): 368–71. http://dx.doi.org/10.1177/1938640016679708.

Full text
Abstract:
Difficult problems that are faced when reconstructing severe pilon fractures include filling metaphyseal defects and supporting an impacted, multifragmented articular surface. Supplements to plate fixation currently available in a surgeon’s armamentarium include cancellous bone autograft, structural bone allograft, demineralized bone matrix, and calcium-based cements. Cancellous autograft possesses limited inherent mechanical stability and is associated with graft site morbidity. Structural allografts incorporate inconsistently and are plagued by late resorption. Demineralized bone matrix also lacks inherent structural stability. Calcium phosphate cements are not rigidly fixed to bone unless fixation is applied from cortical bone or through a plate, which must be taken into consideration when planning fixation. The Conventus DRS (Conventus Orthopaedics, Maple Grove, MN) implant is an expandable nitinol scaffold that takes advantage of the elasticity and shape memory of nitinol alloy. Once deployed and locked, it serves as a stable intramedullary base for fragment-specific periarticular fracture fixation, even in the face of metaphyseal bone loss. Two cases of successful implant use are presented. In both cases, the implant is used to fill a metaphyseal void and provide stable articular support to the distal tibial plafond. Levels of Evidence: Therapeutic Level V: Case Report, Expert Opinion
APA, Harvard, Vancouver, ISO, and other styles
43

Weber, Christian D., Filippo Migliorini, and Frank Hildebrand. "Reconstruction of Large Osteochondral Lesions in the Knee: Focus on Fixation Techniques." Life 11, no. 6 (2021): 543. http://dx.doi.org/10.3390/life11060543.

Full text
Abstract:
Large (&gt;3 cm2), focal osteochondral lesions (OCL) may result in poor functional outcomes and early secondary osteoarthritis of the knee. The surgical management of these OCL remains challenging. The treatment strategy must be tailored to various aspects, including lesion-specific (e.g., size, location, chronicity), joint-specific (e.g., instability, limb alignment, meniscal status), and patient-specific factors (e.g., age, activity level, comorbidities). Simple chondroplasty and bone marrow stimulation (BMS) techniques should be reserved for smaller lesions, as they only realize midterm clinical benefits, related to inferior wear characteristics of the induced fibrocartilage (type I collagen). Therefore, much attention has been focused on surgical restoration with hyaline cartilage (type II collagen), based on chondrocyte transplantation and matrix-assisted autologous chondrocyte implantation (MACI). Limited graft availability, staged procedures (MACI), and high treatment costs are limitations of these techniques. However, acute traumatic OCL of the femoral condyles and patellofemoral joint may also be suitable for preservation by surgical fixation. Early detection of the fragment facilitates primary repair with internal fixation. The surgical repair of the articular surface may offer promising clinical and cost-effective benefits as a first-line therapy but remains under-investigated and potentially under-utilized. As a unique characteristic, the fixation technique allows the anatomic restoration of the hyaline articular surface with native cartilage and the repair of the subchondral bone. In this manuscript, we present a case series of large OCL around the knee that were preserved by surgical fixation. Furthermore, various implants and techniques reported for this procedure are reviewed.
APA, Harvard, Vancouver, ISO, and other styles
44

Kibe, Ryoko, Mitsuo Sakamoto, Hiroshi Yokota, et al. "Movement and Fixation of Intestinal Microbiota after Administration of Human Feces to Germfree Mice." Applied and Environmental Microbiology 71, no. 6 (2005): 3171–78. http://dx.doi.org/10.1128/aem.71.6.3171-3178.2005.

Full text
Abstract:
ABSTRACT Human flora-associated (HFA) mice have been considered a tool for studying the ecology and metabolism of intestinal bacteria in humans, although they have some limitations as a model. Shifts in dominant species of microbiota in HFA mice after the administration of human intestinal microbiota was revealed by 16S rRNA gene sequence and terminal restriction fragment length polymorphism (T-RFLP) analyses. Characteristic terminal restriction fragments (T-RFs) were quantified as the proportion of total peak area of all T-RFs. Only the proportion of the T-RF peak at bp 366, identified as the Gammmaproteobacteria group and the family Coriobacteriaceae, was reduced in this study. Increased T-RFs over time at bp 56, 184, and 196 were affiliated with the Clostridium group. However, most of the isolated bacteria with unique population shifts were phylotypes. The vertical transmission of the intestinal microbiota of the mouse offspring was also investigated by dendrogram analysis derived from the similarity of T-RFLP patterns among samples. As a result, the intestinal microbiota of HFA mice and their offspring reflected the composition of individual human intestinal bacteria with some modifications. Moreover, we revealed that human-derived lactobacilli (HDL), which have been considered difficult to colonize in the HFA mouse intestine in previous studies based on culture methods, could be detected in the HFA mouse intestine by using a lactic acid bacterium-specific primer and HDL-specific primers. Our results indicate that the intestinal microbiota of HFA mice represents a limited sample of bacteria from the human source and are selected by unknown interactions between the host and bacteria.
APA, Harvard, Vancouver, ISO, and other styles
45

Kovac, Z., and R. H. Schwartz. "The molecular basis of the requirement for antigen processing of pigeon cytochrome c prior to T cell activation." Journal of Immunology 134, no. 5 (1985): 3233–40. http://dx.doi.org/10.4049/jimmunol.134.5.3233.

Full text
Abstract:
Abstract Antigen-induced activation of T lymphocytes that co-recognize Ia molecules has been shown to require an antigen-processing step by the presenting cell before T cell stimulation can occur. In this report, we demonstrate that antigen presentation of pigeon cytochrome c to an E kappa beta:E kappa alpha-restricted T cell hybridoma, 2C2, is inhibited by pretreatment of the antigen-presenting cells (APC) either with chloroquine or with fixation by paraformaldehyde. The chloroquine effect was partially reversible after 22 hr; the paraformaldehyde effect was not. In contrast, these treatments had little or no effect on the presentation of the carboxy-terminal cyanogen bromide cleavage fragment of pigeon cytochrome c, residues 81 to 104. There was at least a 50-fold greater potency of the fragment, as compared to that of the intact molecule, when paraformaldehyde-fixed APC were used. In addition, the fixed cells did not present synthetic fragments of the cytochrome c that were nonstimulatory when presented by unfixed cells. This observation showed that the loss of potency, demonstrated previously for analogs of pigeon cytochrome c with single amino acid substitutions at positions such as 99, was not a consequence of an alteration in the rate of antigen-processing. This result is consistent with our earlier hypothesis that these residues are contact amino acids with the antigen-specific T cell receptor or the Ia molecule. The major goal of these experiments was to define the molecular transition that occurred as a result of antigen processing. To achieve this end, we tested a variety of pigeon cytochrome c molecules and fragments for their ability to be presented by paraformaldehyde-fixed APC. Apocytochrome c, the denatured form of the molecule with the heme removed, could not be presented by the fixed cells, nor could the fragment 60-104, derived by acid cleavage of the tryptophan at position 59. Both molecules stimulated an IL 2 response from the T cell hybridoma when unfixed APC were utilized, demonstrating that the conditions used to prepare these two molecules did not destroy their antigenic determinant. In contrast, carboxy-terminal fragments, both native and synthetic, ranging in size from 16 to 39 amino acids, were capable of stimulating in the presence of paraformaldehyde-fixed APC. In particular, the partial-digest cyanogen bromide fragment, residues 66 to 104, was only twofold less potent than the pigeon fragment 81-104.(ABSTRACT TRUNCATED AT 400 WORDS)
APA, Harvard, Vancouver, ISO, and other styles
46

KC, Dr Paramesha, and Dr Rahul Bansal. "Functional outcome in patients with distal radius fractures treated with fragment specific fixation at tertiary care teaching hospital." International Journal of Orthopaedics Sciences 4, no. 1m (2018): 893–96. http://dx.doi.org/10.22271/ortho.2018.v4.i1m.130.

Full text
APA, Harvard, Vancouver, ISO, and other styles
47

Walley, Kempland C., Tyler A. Gonzalez, Sreeharsha V. Nandyala, et al. "Does the Use of Locking Screws Decrease the Rate of Hardware Removal in Ankle Fractures?" Foot & Ankle Specialist 12, no. 6 (2019): 518–21. http://dx.doi.org/10.1177/1938640018823056.

Full text
Abstract:
Background. While biomechanical characteristics of locking screw fixation versus traditional plating has been studied extensively in orthopaedic literature, clinical outcome studies are lacking. The goal of this study was to evaluate the efficacy and complications rate of locking versus traditional nonlocking screws in complex ankle fractures employing distal fibula internal fixation with 1/3 semitubular small fragment plates. Methods. A retrospective review was performed between January 2010 and June 2013 of all patients in whom internal fixation of the fibula in an ankle fracture (open or closed) was performed using only 1/3 semitubular small fragment fibular plates. Patient characteristics, fracture patterns, specific screw choice that were placed in the most distal 2 fibular plate holes (either locking or nonlocking), infectious wound complications, and concomitant syndesmotic injury and the need and corresponding purpose for hardware removal were recorded. Results. A total of 135 patients were found to meet inclusion criteria and were analyzed for this study. Of the patients with locking screws, 25 of 98 (25%) elected to have hardware removed, while 13 of 37 (35%) of those with nonlocking screws elected hardware removal. This did not reach statistical significance (P = .30). There was no statistically significant difference between the groups with regards to age, smoking status, body mass index, diabetes, or use of syndesmotic screw fixation. There was no significant difference in loss of fixation, infection, or other surgical complications in between the groups. Conclusions. There was no significant decrease in the rate of hardware removal with the use of 1/3 tubular locking versus nonlocking plates in the treatment of distal fibula fractures. Despite these screws locking flush to the plate, the hardware is equally symptomatic in both groups. There was no significant difference in the rate of complications between the 2 groups and our data suggest that the added expense of using locking screws routinely when fixing lateral malleolar fractures should be carefully considered, especially if the fracture pattern does not warrant locking technology. Levels of Evidence: Prognostic, Level III
APA, Harvard, Vancouver, ISO, and other styles
48

Fesefeldt, A., K. Kloos, H. Bothe, H. Lemmer, and C. G. Gliesche. "Distribution of denitrification and nitrogen fixation genes inHyphomicrobiumspp. and other budding bacteria." Canadian Journal of Microbiology 44, no. 2 (1998): 181–86. http://dx.doi.org/10.1139/w97-139.

Full text
Abstract:
Genomic DNA of Hyphomicrobium spp., Hirschia baltica ATCC 49814T, Hyphomonas oceanitis ATCC 33897T, and Pedomicrobium ferrugineum S-1290Twas investigated with gene probes specific for nitrate reductase (narG), cytochrome cd1containing nitrite reductase (nirS), Cu-containing nitrite reductase (nirK), nitrous oxide reductase (nosZ), ammonia monooxygenase (amoA), and nitrogenase reductase (nifH) by Southern or dot blot hybridization. The presence of denitrification genes could be demonstrated for Hyphomicrobium denitrificans 1869T, Hyphomicrobium aestuarii IFAM NQ-521GrT, Hyphomicrobium zavarzinii IFAM ZV-580, Hyphomicrobium zavarzinii subsp. chengduense, in the Hyphomicrobium DNA-DNA hybridization groups 3, 12, 13, 18, 26a1, 26a2, 26c, 26d, 26e, 26f, 26g2, and 29, and in three isolates from a denitrifying sand filter in a municipal wastewater treatment plant. The Cu-containing nitrite reductase appeared to be more frequent than the cytochrome cd1containing nitrite reductase in hyphomicrobia. Resulting positive DNA-DNA hybridization signals correlated with physiological activity measurements of intact cells in all cases determined. The nifH-like gene fragment was found in Hyphomicrobium aestuarii, Hyphomicrobium zavarzinii, Hyphomicrobium zavarzinii subsp. chengduense, Hyphomicrobium facilis and eight additional DNA-DNA hybridization groups. Ammonia monooxygenase was not genetically detected in any of the strains investigated. The results significantly extended the previous findings that genetically different hyphomicrobia of a sewage treatment plant and its adjacent receiving lake could occupy different ecological niches. Denitrification genes or the nifH-like gene fragment were not found in the other budding bacteria investigated.Key words: Hyphomicrobium, denitrification, nitrification, nitrogen fixation, activated sludge, biofilm.
APA, Harvard, Vancouver, ISO, and other styles
49

Chung, HoeJeong, Hoon-Sang Sohn, Jong-Keon Oh, Sangho Lee, and DooSup Kim. "Biomechanical Comparison of Fixation Methods for Posterior Wall Fractures of the Acetabulum: Conventional Reconstruction Plate vs. Spring Plate vs. Variable Angle Locking Compression Plate." Medicina 60, no. 6 (2024): 882. http://dx.doi.org/10.3390/medicina60060882.

Full text
Abstract:
Background and Objectives: Acetabular fractures, though infrequent, present considerable challenges in treatment due to their association with high-energy trauma and poor prognoses. Posterior wall fractures, the most common type among them, typically have a more favorable prognosis compared to other types. Anatomical reduction and stable fixation of the posterior wall are crucial for optimal treatment outcomes. This study aimed to biomechanically compare three commonly used fixation methods for posterior wall fractures of the acetabulum—a conventional reconstruction plate, a spring plate, and a 2.7 mm variable angle locking compression plate (VA-LCP). Materials and Methods: The study utilized 6 fresh-frozen cadavers, yielding 12 hemipelvises free from prior trauma or surgery. Three fixation methods were compared using a simple acetabulum posterior wall fracture model. Fixation was performed by an orthopedic specialist, with prebending of plates to minimize errors. Hemipelvises were subjected to quasi-static and cyclic loading tests, measuring fracture gap, stiffness, and displacement under load. Results: It showed no significant differences in fracture gap among the three fixation methods under cyclic loading conditions simulating walking. However, the conventional reconstruction plate exhibited a greater stiffness compared to the spring and variable angle plates. Fatigue analysis revealed no significant differences among the plates, indicating a similar stability throughout cyclic loading. Despite differences in stiffness, all three fixation methods demonstrated adequate stability under loading conditions. Conclusions: While the conventional reconstruction plate demonstrated a superior stiffness, all three fixation methods provided sufficient stability under cyclic loading conditions similar to walking. This suggests that postoperative limitations are unlikely with any of the three methods, provided excessive activities are avoided. Furthermore, the variable angle plate—like the spring plate—offers an appropriate stability for fragment-specific fixation, supporting its use in surgical applications. These findings contribute to understanding the biomechanical performance of different fixation methods for acetabular fractures, facilitating improved surgical outcomes in challenging cases.
APA, Harvard, Vancouver, ISO, and other styles
50

M.Kiran, Kumar, Nagamuneendrudu, Suryanarayana J, and Abhishek. "Functional Outcome and Radiological Outcome of Comminuted Distal Radius Fractures Treated Surgically with Column Specific Fixation in a Tertiary Care Hospital." International Journal of Pharmaceutical and Clinical Research 15, no. 12 (2023): 1549–55. https://doi.org/10.5281/zenodo.11205055.

Full text
Abstract:
<strong>Introduction:</strong>&nbsp;In clinical practice, a fracture of the distal radius is one of the most common types of fractures observed. Accidents involving motor vehicles or falls from great heights are the most common causes of comminuted intra-articular fractures in young patients. It is connected with severe osteoporosis in older age groups since even a minor fall might cause it. To study the functional outcome and radiological outcome of Comminuted Distal Radius fractures treated surgically with column specific fixation in a Tertiary care hospital.&nbsp;<strong>Material and methods:</strong>&nbsp;A prospective observational study was conducted to show the effectiveness of column specific fixation on the functional/radiological outcomes while managing comminuted intra-articular distal end radius fractures. This study was conducted in the Department of Orthopaedics, SV Medical College, and Tirupati between April 2021 to October 2022. 35 patients with comminuted intra-articular fractures of distal radius were analysed. Measurements recorded pre-operatively based on PA radiograph and lateral radiograph are Radial height, Radial length, ulnar variance and sagittal inclination. Patients included in the study underwent surgical procedures as per the standard guidelines. Pre and postoperative assessments were performed to evaluate their functional outcome. Finally, statistical analysis was performed to evaluate effectiveness of column specific fixation with LCP before and after surgery.&nbsp;<strong>Results:</strong>&nbsp;The study included 26 male and 09 female patients aged 18 to 75 years. Patients were followed up at three, six, twelve, and twenty-four weeks and evaluated based on the assessment scores. The mean Mayo wrist score at six months post-op was considerably greater than at six weeks. Mean early post-operative radial height, inclination, and volar tilt were considerably higher than six months post-op.&nbsp; Mean early post-operative ulnar variance was much smaller than six months post-op. Mean flexion, extension, supination, pronation, radial deviation, and ulnar deviation were considerably higher six months after surgery than six weeks after surgery. Mean grip strength was significantly higher six months after surgery than six weeks after surgery.&nbsp;<strong>Conclusion:</strong>&nbsp;When one or both columns are involved, column-specific fixation is useful. Hardware impingement is limited due to low profile and anatomical design. Dorsal plating has fewer tendon irritation and attritional rupture issues with this approach. Making fragment-specific implants like buttress pin plates and hook plates available on the table when designing complicated fractures improves satisfactory radiological and functional outcomes. &nbsp; &nbsp;
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!