{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,1]],"date-time":"2026-04-01T18:47:41Z","timestamp":1775069261093,"version":"3.50.1"},"reference-count":40,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2018,2,13]],"date-time":"2018-02-13T00:00:00Z","timestamp":1518480000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"Dr. and Mrs. Leonard Marmor Fund"},{"name":"Clark and Kirby Foundations"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal Orthopaedic Research"],"published-print":{"date-parts":[[2018,7]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:sec><jats:label\/><jats:p>Medial unicompartmental knee arthroplasty (UKA) is an accepted treatment for isolated medial osteoarthritis. However, using an improper thickness for the tibial component may contribute to early failure of the prosthesis or disease progression in the unreplaced lateral compartment. Little is known of the effect of insert thickness on both knee kinematics and ligament forces. Therefore, a computational model of the tibiofemoral joint was used to determine how non\u2010conforming, fixed bearing medial UKA affects tibiofemoral kinematics, and tension in the medial collateral ligament (MCL) and the anterior cruciate ligament (ACL) during passive knee flexion. Fixed bearing medial UKA could not maintain the medial pivoting that occurred in the intact knee from 0\u00b0 to 30\u00b0 of passive flexion. Abnormal anterior\u2013posterior (AP) translations of the femoral condyles relative to the tibia delayed coupled internal tibial rotation, which occurred in the intact knee from 0\u00b0 to 30\u00b0 of flexion, but occurred from 30\u00b0 to 90\u00b0 of flexion following UKA. Increasing or decreasing tibial insert thickness following medial UKA also failed to restore the medial pivoting behavior of the intact knee despite modulating MCL and ACL forces. Reduced AP constraint in non\u2010conforming medial UKA relative to the intact knee leads to abnormal condylar translations regardless of insert thickness even with intact cruciate and collateral ligaments. This finding suggests that the conformity of the medial compartment as driven by the medial meniscus and articular morphology plays an important role in controlling AP condylar translations in the intact tibiofemoral joint during passive flexion. \u00a9 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 36:1868\u20131875, 2018.<\/jats:p><\/jats:sec>","DOI":"10.1002\/jor.23838","type":"journal-article","created":{"date-parts":[[2017,12,16]],"date-time":"2017-12-16T21:44:06Z","timestamp":1513460646000},"page":"1868-1875","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Fixed\u2010bearing medial unicompartmental knee arthroplasty restores neither the medial pivoting behavior nor the ligament forces of the intact knee in passive flexion"],"prefix":"10.1002","volume":"36","author":[{"given":"Mohammad","family":"Kia","sequence":"first","affiliation":[{"name":"Department of Biomechanics Hospital for Special Surgery 535 E. 70th St. New York New York 10021"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lucian C.","family":"Warth","sequence":"additional","affiliation":[{"name":"Orthopaedic Surgery Indiana University Health 200 Hawkins Dr. Iowa City Iowa 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