Design and Simulation of the Adjustable Weight bearing system to adjust the torque change by the distal joint on 2DOF body limb

2015 ◽  
Author(s):  
Daegeun Park ◽  
Kyu-Jin Cho
Keyword(s):  
Weight Bearing ◽  
Adjustable Weight ◽  
Distal Joint ◽  
Bearing System

scholarly journals Plantar Pressure Reduction in an Incremental Weight-Bearing System

1997 ◽  
Vol 77 (4) ◽  
pp. 410-416 ◽  
Author(s):  
Timothy W Flynn ◽  
Paul K Canavan ◽  
Peter R Cavanagh ◽  
Jin-Hsien Chiang
Keyword(s):  
Plantar Pressure ◽  
Weight Bearing ◽  
Pressure Reduction ◽  
Bearing System

Weight-Bearing System

Orthopedics ◽  
1998 ◽  
Vol 21 (10) ◽  
pp. 1144-1144
Author(s):  
Anonymous
Keyword(s):  
Weight Bearing ◽  
Bearing System

scholarly journals The etiology of the end-stage varus type ankle arthritis evaluated by weight-bearing simulated computed tomography

2018 ◽  
Vol 3 (3) ◽  
pp. 2473011418S0029
Author(s):  
Hiroaki Kurokawa ◽  
Akira Taniguchi ◽  
Yasuhito Tanaka
Keyword(s):  
Computed Tomography ◽  
Correlation Coefficient ◽  
Pearson Correlation ◽  
Weight Bearing ◽  
Joint Surface ◽  
Pearson Correlation Coefficient ◽  
Ankle Arthritis ◽  
Tibiotalar Joint ◽  
Stage 4 ◽  
Distal Joint

Category: Ankle Arthritis Introduction/Purpose: In the patients with the varus type ankle arthritis, the stage of disease was classified according to the narrowing of tibiotalar joint using the weight-bearing ankle radiography. By the Takakura-Tanaka classification, the stage 4 ankle arthritis indicates more than half of the joint space was disappeared in the tibiotalar joint. Inclination of the surface of tibiotalar joint in the patients with stage 4 ranges from neutral to severely varus, that may confuse the etiology of staged ankle arthritis. The purpose of this study was clarifying the etiology of the stage 4 ankle arthritis combined with evaluating the syndesmotic instability using the weight-bearing simulated computed tomography(CT). Methods: Forty nine ankles with stage 4 varus type ankle arthritis were investigated. A weight-bearing simulated CT scan was taken in the neutral position of the ankle with a 300 N pressure from plantar side. In the axial view of the CT at 1 cm proximal to the tibial plafond, the distance between the fibula and the tibia was measured as the fibular clear space (FCS-CT). In the anteroposterior view of the weight-bearing radiography of the ankle, the angle between the tibial shaft and the joint surface of the distal end of the tibia was measured as the tibial anterior surface angle(TAS-Xp). The Pearson correlation coefficient was obtained to identify the correlations between the FCS-CT and the TAS-Xp. P values <0.05 were considered statistically significant. Results: The FCS-CT was 4.3±1.2 mm. The TAS-Xp was 81±4.9°. According to the Pearson correlation coefficient between the FCS-CT and the TAS-Xp, positive correlations were identified (r=0.45; p=0.0011). Conclusion: This study revealed the correlation between the inclination of the distal joint surface of the tibia and distance of the tibiofibular syndesmosis. In the patients with larger FCS-CT, syndesmotic instability may exist, that may lead to the distributed share stress in the tibiotalar joint without the inclination of the joint surface. In the patients with smaller FCS-CT, the varus stress directly transfer to the ankle joint, that may cause to the varus inclination of the distal joint surface of the tibia.

Single Hemicerclage for Lateral Type B Malleolar Fracture - A Novel, Minimal and Reliable Osteosynthesis

Swiss Surgery ◽  
2003 ◽  
Vol 9 (6) ◽  
pp. 283-288
Author(s):  
Maurer ◽  
Stamenic ◽  
Stouthandel ◽  
Ackermann ◽  
Gonzenbach
Keyword(s):  
Ankle Joint ◽  
Weight Bearing ◽  
Fracture Type ◽  
Type B ◽  
Malleolar Fracture ◽  
Metallic Wire ◽  
Long Term Outcome ◽  
X Ray ◽  
Upper Ankle Joint ◽  
Upper Ankle

Aim of study: To investigate the short- and long-term outcome of patients with isolated lateral malleolar fracture type B treated with a single hemicerclage out of metallic wire or PDS cord. Methods: Over an 8-year period 97 patients were treated with a single hemicerclage for lateral malleolar fracture type B and 89 were amenable to a follow-up after mean 39 months, including interview, clinical examination and X-ray controls. Results: The median operation time was 35 minutes (range 15-85 min). X-ray controls within the first two postoperative days revealed an anatomical restoration of the upper ankle joint in all but one patient. The complication rate was 8%: hematoma (2 patients), wound infection (2), Sudeck's dystrophy (2) and deep vein thrombosis (1). Full weight-bearing was tolerated at median 6.0 weeks (range 2-26 weeks). No secondary displacement, delayed union or consecutive arthrosis of the upper ankle joint was observed. All but one patient had restored symmetric joint mobility. Ninety-seven percent of patients were satisfied or very satisfied with the outcome. Following bone healing, hemicerclage removal was necessary in 19% of osteosyntheses with metallic wire and in none with PDS cord. Conclusion: The single hemicerclage is a novel, simple and reliable osteosynthesis technique for isolated lateral type B malleolar fractures and may be considered as an alternative to the osteosynthesis procedures currently in use.

Force Plate Analysis of Dogs with Bilateral Hip Dysplasia Treated with a Unilateral Triple Pelvic Osteotomy: A Long-term Review of Cases

1998 ◽  
Vol 11 (02) ◽  
pp. 85-93 ◽  
Author(s):  
Joanne R. Cockshutt ◽  
H. Dobson ◽  
C. W. Miller ◽  
D. L. Holmberg ◽  
Connie L. Taves ◽  
...  
Keyword(s):  
Gait Analysis ◽  
Hip Dysplasia ◽  
Weight Bearing ◽  
Force Plate ◽  
Case Series ◽  
Pelvic Osteotomy ◽  
Vertical Force ◽  
Long Term Outcome ◽  
Case Series Study

SummaryA retrospective case series study was done to determine the long-term outcome of operations upon dogs treated for canine hip dysplasia by means of a triple pelvic osteotomy (TPO). Twentyfour dogs with bilateral hip dysplasia, that received a unilateral TPO between January 1988 and June 1995, were re-examined at the Ontario Veterinary College. The assessment included physical, orthopedic and lameness examinations, standard blood work, pelvic radiographs and force plate gait analysis. They were compared to bilaterally dysplastic dogs that had not been treated, and also to normal dogs. Force plate data analysis demonstrated a significant increase in peak vertical force (PVF) and mean vertical force over stance (MVF) in the limb that underwent surgical correction by means of a TPO, when compared to the unoperated hip. It was determined that performing a unilateral TPO on a young dysplastic dog resulted in greater forces and weight bearing being projected through the TPO corrected limb when compared to the unoperated limb.Dogs with bilateral hip dysplasia treated with a unilateral triple pelvic osteotomy (TPO) were assessed by force plate gait analysis, radiographs and orthopedic examination. There was a significant increase in hip Norberg angles over time, although degenerative changes did progress. Limbs that had been operated upon had significantly greater peak and mean ground reaction forces than limbs that had not received an operation.

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