Quantification of Effect of Sequential Posteromedial Release on Flexion and Extension Gaps

Abstract A novel sequence of posteromedial release consistent with surgical technique of total knee arthroplasty was performed in 15 cadaveric knees. Medial and lateral flexion and extension gaps were measured after each step of the release using a computed tomography–free computer navigation system...

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Bibliographic Details
Published in:The Journal of arthroplasty 2009, Vol.24 (5), p.795-805
Main Authors: Mullaji, Arun, FRCS Ed, MCh Orth, MS Orth, Sharma, Amit, MS Orth, DNB Orth, Marawar, Satyajit, MS Orth, Kanna, Raj, MS Orth
Format: Article
Language:English
Subjects:
computer navigation
knee
Orthopedics
posteromedial release
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Summary:Abstract A novel sequence of posteromedial release consistent with surgical technique of total knee arthroplasty was performed in 15 cadaveric knees. Medial and lateral flexion and extension gaps were measured after each step of the release using a computed tomography–free computer navigation system. A spring-loaded distractor and a manual distractor were used to distract the joint. Posterior cruciate ligament release increased flexion more than extension gap; deep medial collateral ligament release had a negligible effect; semimembranosus release increased the flexion gap medially; reduction osteotomy increased medial flexion and extension gaps; superficial medial collateral ligament release increased medial joint gap more in flexion and caused severe instability. This sequence of release led to incremental and differential effects on flexion-extension gaps and has implications in correcting varus deformity.
ISSN:0883-5403
1532-8406
DOI:10.1016/j.arth.2008.03.018