Effect of Tibiotalar Joint Arthrodesis on Adjacent Tarsal Joint Pressure in a Cadaver Model

2007 ◽  
Vol 28 (1) ◽  
pp. 103-108 ◽  
Author(s):  
Hong-Geun Jung ◽  
Brent G. Parks ◽  
Augustine Nguyen ◽  
Lew C. Schon
2020 ◽  
Vol 5 (4) ◽  
pp. 2473011420S0025
Author(s):  
Zhao Hong-Mou

Category: Ankle; Basic Sciences/Biologics Introduction/Purpose: To study the effect of different degrees of distal tibial varus and valgus deformities on the tibiotalar joint contact, and to understand the role of fibular osteotomy. Methods: Eight cadaveric lower legs were used for biomechanical study. Nine conditions were included: normal ankle joint (group A), 10° varus (group B), 5° varus (group C), 5° valgus (group D), 10° valgus (group E) with fibular preserved, and 10° varus (group F), 5° varus (group G), 5° valgus (group H), and 10° valgus (group I) after fibular osteotomy. The joint contact area, contact pressure, and peak pressure were tested; and the translation of contact force center was observed. Results: The joint contact area, contact pressure, and peak pressure had no significant difference between group A and groups B to E (P>0.05). After fibular osteotomy, the contact area decreased significantly in groups F and I when compared with group A (P<0.05); the contact pressure increased significantly in groups F, H, and I when compared with group A (P<0.05); the peak pressure increased significantly in groups F and I when compared with group A (P<0.05). There were two main anterior-lateral and anterior-medial contact centers in normal tibiotalar joint, respectively; and the force center was in anterior-lateral part, just near the center of tibiotalar joint. While the fibula was preserved, the force center transferred laterally with increased varus angles; and the force center transferred medially with increased valgus angles. However, the force center transferred oppositely to the medial part with increased varus angles, and laterally with increased valgus angles after fibular osteotomy. Conclusion: Fibular osteotomy facilitates the tibiotalar contact pressure translation, and is helpful for ankle joint realignment in suitable cases.


2011 ◽  
Vol 32 (11) ◽  
pp. 1017-1022 ◽  
Author(s):  
Masamitsu Kido ◽  
Kazuya Ikoma ◽  
Kan Imai ◽  
Masahiro Maki ◽  
Ryota Takatori ◽  
...  

Background: The objective of this study was to evaluate the bone rotation of each joint in the hindfoot and compare the load response in healthy feet with that in flatfeet by analyzing the reconstructive three-dimensional (3D) CT image data during weightbearing. Methods: CT scans of 21 healthy feet and 21 feet with flatfoot deformity were taken in non-load condition followed by full-body weightbearing load condition. The images of the hindfoot bones were reconstructed into 3D models. The volume merge method in three planes was used to calculate the position of the talus relative to the tibia in the tibiotalar joint, the navicular relative to the talus in talonavicular joint, and the calcaneus relative to the talus in the talocalcaneal joint. Results: The talar position difference to the load response relative to the tibia in the tibiotalar joint in a flatfoot was 1.7 degrees more plantarflexed in comparison to that in a healthy foot ( p = 0.031). The navicular position difference to the load response relative to the talus in the talonavicular joint was 2.3 degrees more everted ( p = 0.0034). The calcaneal position difference to the load response relative to the talus in the talocalcaneal joint was 1.1 degrees more dorsiflexed ( p = 0.0060) and 1.7 degrees more everted ( p = 0.0018). Conclusion: Referring to previous cadaver study, regarding not only the cadaveric foot, but also the live foot, joint instability occurred in the hindfoot with load in patients with flatfoot. Clinical Relevance: The method used in this study might be applied to clinical analysis of foot diseases such as the staging of flatfoot and to biomechanical analysis to evaluate the effects of foot surgery in the future. Level of Evidence: III


2015 ◽  
Vol 39 (7) ◽  
pp. 1335-1341 ◽  
Author(s):  
Stefan Schwienbacher ◽  
Emin Aghayev ◽  
Ulf Krister Hofmann ◽  
Maurice Jordan ◽  
Antongiulio Marmotti ◽  
...  

1997 ◽  
Vol 18 (12) ◽  
pp. 792-797 ◽  
Author(s):  
Jennifer S. Wayne ◽  
Keith W. Lawhorn ◽  
Kenneth E. Davis ◽  
Karanvir Prakash ◽  
Robert S. Adelaar

Contact areas and peak pressures in the posterior facet of the subtalar and the talonavicular joints were measured in cadaver lower limbs for both the normal limb and after fixation of the tibiotalar joint. Six joints were fixed in neutral, in 5–7° of varus and of valgus. Ten degrees of equinus angulation was also studied. Each position of fixation was tested independently. Neutral was defined as fixation without coronal or sagittal plane angulation compared with prefixation alignment of the specimen. When compared with normal unfused condition, peak pressures increased, and contact areas decreased in the subtalar joint for specimens fixed in neutral, varus, and valgus. However, the change in peak pressure for neutral fusion compared with normal control was not statistically significant ( P > 0.07). Peak pressures for varus and valgus fixation were significantly different from normal ( P < 0.001). Contact areas for all positions of fixation were significantly different from normal ( P < 0.001). Coronal plane angulation, however, also resulted in significantly lower contact areas compared with neutral fixation ( P < 0.001). Contact areas and peak pressures in the talonavicular joint did not appear to be substantially affected by tibiotalar fixation with coronal plane angulation. Equinus fixation qualitatively increased contact areas and peak pressures in the talonavicular and posterior facet of the subtalar joint. Neutral alignment of the tibiotalar joint in the coronal and sagittal planes altered subtalar and talonavicular joint contact characteristics the least compared with normal controls. Therefore, ankle fusion in the neutral position would be expected to most closely preserve normal joint biomechanics and may limit the progression of degenerative arthrosis of the subtalar joint.


1930 ◽  
Vol 62 (4) ◽  
pp. 84-87 ◽  
Author(s):  
M. C. van Duzee

Male: Length 2.6-3 mm. Head, thorax, abdomen, legs and feet thickly white pruinose, but the ground color showing through; face moderately wide, wholly pollinose, this pollen yellow in the middle, reaching the orbits at the suture, sides of upper part narrowly, below the suture widely white pollinose, sonsetimes the yellow pollen covers most of upper part and extends onto the inner part of the palpi; palpi with snow white pollen, each nearly as large as upper part of face; antennae wholly yellow, small, arista whitish; orbital cilia white, rather long on the sides; occiput, front, thorax and abdomen reddish coppery, posterior margins of abdominal segments sometimes green ; bristles of thorax small, black; hairs of ahdomen very short, white; pleura and coxae black with ground color nearly concealed with white pollen, tips of coxae yellow; hypopygium small, with a long, straight, black appendage extending forward under the abdomen and small yellowish appendages inside of this long one; femora, tibiae and tarsi pale yellow, last two joints of all tarsi blackish; the minute hairs on all femora and tibiae white, the small bristles on tibiae black; fore tibiae with a row of long white hairs on upper surface, which are as long as diameter of tibiae and extend to fourth tarsal joint, becoming shorter towards the end; apical joint of middle tarsi very slightly widened; pulvilli not enlarged ; joints of fore tarsi as 20-8-6-5-7 ; of middle ones as 32-14-9-6-6; joints of posterior pair as 25-19-11-6-7.


1985 ◽  
Vol &NA; (199) ◽  
pp. 72???80 ◽  
Author(s):  
RICHARD R. TARR ◽  
CHARLES T. RESNICK ◽  
KENDALL S. WAGNER ◽  
AUGUSTO SARMIENTO

2020 ◽  
Vol 49 (6) ◽  
pp. 830-835
Author(s):  
Yevheniya Nechiporuk ◽  
Vitaliy Novak ◽  
Antonina Melnychenko ◽  
Olga Bevz ◽  
Volodymyr Dudka

2019 ◽  
pp. 1-2
Author(s):  
Archana Babu. P

Congenital Talipes Equino Varus is one of the most common congenital deformity which occurs in 1/1000 live birth worldwide. Regarding management of this clubfoot ,most orthopaedic surgeons agree that approach management of children with congenital talipes equino varus deformity of foot should begin with conservative measures i.e, manipulation and serial casting in position of correction. One or more surgical procedures are often required in patients who had incomplete correction , recurrent deformity , syndromic correction and after repeated manipulation and casts. Recurrence is a common problem following the club foot surgery one of the reason for recurrence can be redisplacement of tarsal bones .This study aims to compare prospectively the functional and cosmetic outcome of two groups of club foot-one in whom tarsal joint were fixed with k-wires after doing posteromedial soft tissue release and one in whom tarsal joint were not fixed after soft tissue release .To know the incidence of congenital talipes equino varus with respect to age and sex predilection over a period of two years which were admitted between October 2017 to October 2019, 28 idiopathic club foot in 20 children range from 4 months to 3 years were treated out of 20 cases 12 were males,8 were females.8 patients had bilateral deformity out of 12 unilateral deformities 8 were on right side and 4 were on the left side. Male and female ratio 1.5:1 and unilateral to bilateral 1.5 :1.In 12 feet turco's posteromedial soft tissue release and internal fixation of tarsal joints with k-wires was done in 16 feet only turco's posteromedial soft tissue release was done. The period of follow up ranges from 6 months to 2 years


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