Effect of subtalar arthroereisis on the tibiotalar contact characteristics in a cadaveric flatfoot model

Abstract Previous studies reported the effect of flatfoot deformity on tibiotalar joint contact characteristics. The lateral shift of the load which occurred in flatfeet may be responsible for degenerative changes in the ankle joint. The purpose was to assess the pattern of joint contact stress of t...

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Bibliographic Details
Published in:Journal of biomechanics 2012-06, Vol.45 (9), p.1745-1748
Main Authors: Martinelli, N, Marinozzi, A, Schulze, M, Denaro, V, Evers, J, Bianchi, A, Rosenbaum, D
Format: Article
Language:English
Subjects:
Aged
Ankle Joint - physiology
Ankle osteoarthritis
Biological and medical sciences
Biomechanics
Cadaver
Cadavers
Contact
Contact stresses
Deformation effects
Diseases of the osteoarticular system
Female
Flatfoot
Flatfoot - physiopathology
Humans
Hypotheses
Male
Malformations and congenital and or hereditary diseases involving bones. Joint deformations
Medical sciences
Orthopedic surgery
Physical Medicine and Rehabilitation
Pressure
Subtalar arthroereisis
Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases
Talus - physiology
Tendons
Tibia - physiology
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Summary:Abstract Previous studies reported the effect of flatfoot deformity on tibiotalar joint contact characteristics. The lateral shift of the load which occurred in flatfeet may be responsible for degenerative changes in the ankle joint. The purpose was to assess the pattern of joint contact stress of the tibiotalar joint in intact, flat, and corrected specimens with subtalar arthroereisis. Seven fresh-frozen cadaver specimens were studied in the intact and flat-footed condition after transection of ligaments which support the medial arch. Ankle joint contact stress and plantar pressure patterns were determined from a capacitive pressure sensor inserted in the tibiotalar joint and a pressure distribution platform when the specimens were axially loaded in simulated mid-stance. Contact pressure was also assessed after subtalar arthroereisis with a 12 mm Kalix implant for correction of the flatfoot deformity. A maximum contact pressure of 1414.2±319.2 kPa was recorded in the middle-medial region in intact specimens. Flatfoot caused a lateral shift in the pressure distribution ( p
ISSN:0021-9290
1873-2380
DOI:10.1016/j.jbiomech.2011.11.009