Electromechanical system for assessing bone consolidation in external fixation systems—a simplified approach

2021 ◽  
pp. 103-106
Author(s):  
M.F. Paulino ◽  
M.A. Neto ◽  
A.M. Amaro ◽  
I. Balacó ◽  
F. Moita ◽  
...  
2014 ◽  
Vol 43 (8) ◽  
pp. 903-911 ◽  
Author(s):  
Joanne L. Tuohy ◽  
Denis J. Marcellin-Little ◽  
Emily H. Griffith

2011 ◽  
Vol 4 (6) ◽  
pp. 370-372 ◽  
Author(s):  
Paul Dayton ◽  
Dustin B. Prins ◽  
Nathan Hensley ◽  
Jeffrey Wienke

Pin tract inflammation and/or infection are common with the use of external fixation devices. Pin sites need to be managed to help prevent complications. There are a variety of regimens proposed for pin care in the literature. The authors present an efficient and simplified approach for addressing pin care protocol using cord locks with the use of compression sponges for external fixation devices. This method obviates the need for extensive bandaging and makes pin care easy for the patient to carry out. A brief review of the current evidence on pin care is presented, and an evidence-based pin care protocol is presented. Level of Evidence: Therapeutic, Level V


2018 ◽  
Vol 25 (3-4) ◽  
pp. 71-78
Author(s):  
A. V Tsiskarashvili ◽  
A. V Zhadin ◽  
K. A Kuzmenkov ◽  
K. M Bukhtin ◽  
R. E Melikova

The aim of the study is to evaluate results of follow-up in patients with femur pseudarthrosis complicated by chronic osteomyelitis who underwent biomechanically validated transosseus fixation. Materials and methods. A retrospective study of transosseus fixation in 72 patients with femur pseudarthrosis complicated by chronic osteomyelitis was conducted. Described fixation was completed according to the biomechanical fixation conception from 2011 to 2017. Hybrid external fixator was applied to 38 (52,8%) patients, rod-based external fixator - to 34 (47,2%). Results. Full bone consolidation and pyoinflammatory process remission in treated femur bone is achieved in all cases. Results classified as excellent were acquired in 21 patients (29,5%), good - in 41 (57,7%), satisfactory - in 7 (9,8%), unsatisfactory - in 2 (3%). patients results were classified as unsatisfactory because of lacking of weight-bearing ability of the leg because of other reasons not related to consolidation. Conclusion. In patients with infected femur pseudarthroses external fixation using biomechanical conception allows to provide up to 97% positive clinical outcomes of the treatment.


2020 ◽  
Vol 99 (8) ◽  

Introduction: The study compares the results of open reduction using volar locking plates with ligamentotaxis by external fixation in fractures of distal radius type 2R3C according to AO classification. Methods: A retrospective study evaluating the results of osteosynthesis in patients with distal radius fractures type 2R3C according to AO classification, operated until December 2018. The ORIF method with volar locking plates (LCP) was used in 54 patients, and closed reduction with ligamentotaxis using external fixation (EF) was used in 33 patients. The mean age of the patients was 46.7 years in the LCP group and 59.6 years in the EF group. All were evaluated for their X-ray and functional outcomes and according to the Green and O’Brien score at 6 and 12 months after surgery. Results: According to X-rays at 12 months in the LCP group, the mean sagittal tilt was 10.13°, the mean radial inclination was 23.89°, and the mean radial length was 11.84 mm. In the EF group, the mean sagittal tilt was 6.32°, the mean radial inclination was 24.78°, and the mean radial length was 9.89 mm. According to the Green and O’Brien score, we recorded a mean score of 84.44 points in the LCP group at 12 month; we achieved good and excellent results in 83.33% of the patients and no poor result was observed. In the EF group the final mean score was 77.27; good and excellent results were achieved in 45.46% of the patients and a poor result in one patient. Conclusion: Based on the results in our group of patients, the internal type osteosynthesis using LCP implants can be recommended as a first-choice technique in the treatment of 2R3C fractures according to AO classification.


2015 ◽  
Vol 20 (96) ◽  
pp. 15-21
Author(s):  
Victor V. Busher ◽  
◽  
Elena V. Naydenko ◽  

2003 ◽  
Vol 31 (3) ◽  
pp. 132-158 ◽  
Author(s):  
R. E. Okonieski ◽  
D. J. Moseley ◽  
K. Y. Cai

Abstract The influence of tread designs on tire performance is well known. The tire industry spends significant effort in the development process to create and refine tread patterns. Creating an aesthetic yet functional design requires characterization of the tread design using many engineering parameters such as stiffness, moments of inertia, principal angles, etc. The tread element stiffness is of particular interest because of its use to objectively determine differences between tread patterns as the designer refines the design to provide optimum levels of performance. The tread designer monitors the change in stiffness as the design evolves. Changes to the geometry involve many attributes including the number of sipes, sipe depth, sipe location, block element edge taper, nonskid depth, area net-to-gross, and so forth. In this paper, two different formulations for calculating tread element or block stiffness are reviewed and are compared to finite element results in a few cases. A few simple examples are shown demonstrating the basic functionality that is possible with a numerical method.


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