Abstract
Varus malalignment of the tibia could alter ankle biomechanics, and might lead to degenerative changes of the ankle joint. However, previous studies failed to report the detailed changes of ankle biomechanics in varus malalignment of the tibia. The aim of this biomechanical study was to evaluate how the ankle joint pressure would change in response to the incremental increases in varus malalignment of the tibia. Eight fresh-frozen human cadaver legs were tested in this study. Varus malalignment of the tibia and a total of 600 N compressive force was simulated using a custom made fixture. Intra-articular sensors (TeckScan) were inserted in the ankle joint to collect the ankle joint pressure data. The testing sequence was 0°, 2°,4°,6°,8°,10°,12°,14°,16°,18°,20° of tibial varus. As the tibial varus progressed, the center of force (COF) shifted laterally both for the medial and lateral aspect of the ankle joint. For the medial aspect of the ankle joint, the lateral shift reached its maximum at 8° [2.76 (1.62) mm, p = 0.002] of tibial varus, while for the lateral aspect of the ankle joint, the lateral shift reached its maximum at 12° [2.11 (1.19) mm, p = 0.002] of tibial varus. Thereafter, the COF shifted medially as the tibial varu...Continue Reading
References
Apr 1, 1987·Foot & Ankle·A J TingC Resnick
Nov 1, 2003·Foot & Ankle International·Emmanouil D StamatisMark S Myerson
Dec 7, 2007·The Journal of Bone and Joint Surgery. British Volume·F KrauseM Weber
Apr 30, 2008·Foot & Ankle International·Koji HayashiYoshinori Takakura
Oct 1, 2010·Foot & Ankle International·Fabian G KrauseMartin Weber
Dec 2, 2010·Clinical Orthopaedics and Related Research·Arun Mullaji, Gautam M Shetty
Oct 8, 2011·The Journal of the American Academy of Orthopaedic Surgeons·Roberto RossiAnnunziato Amendola
Jul 10, 2012·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Andrew A Amis
Oct 12, 2012·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·I McNamaraJ R Giffin
Nov 20, 2012·Foot and Ankle Clinics·Yasuhito Tanaka
Jul 31, 2013·Foot & Ankle International·Timo SchmidFabian G Krause
Jul 16, 2014·Clinical Orthopaedics and Related Research·Adam A NortonCatherine Fruehling-Wall
Oct 16, 2014·Clinical Orthopaedics and Related Research·Bibo WangAlexej Barg
Aug 22, 2015·Foot & Ankle International·Nicola KrähenbühlMarkus Knupp
May 20, 2016·The Journal of the American Academy of Orthopaedic Surgeons·Beat HintermannAlexej Barg
Jul 1, 2016·Journal of Orthopaedics and Traumatology : Official Journal of the Italian Society of Orthopaedics and Traumatology·Benjamin V Herman, J Robert Giffin
Jun 1, 2017·The Journal of Knee Surgery·C BaierG Maderbacher