Voellner, Florian and Fischer, Johannes and Weber, Markus and Greimel, Felix and Benditz, Achim and Renkawitz, Tobias and Grifka, Joachim and Craiovan, Benjamin (2019) Weakening of the knee ligament complex due to sequential medial release in total knee arthroplasty. ARCHIVES OF ORTHOPAEDIC AND TRAUMA SURGERY, 139 (7). pp. 999-1006. ISSN 0936-8051, 1434-3916
Full text not available from this repository. (Request a copy)Abstract
PurposeThe purpose of this study was to investigate the effects of sequential medial release on the stiffness and collateral stability of the ligament complex of the knee. Irrespective of the implantation technique used, varus deformity frequently requires release of the capsular ligament complex. Yet, no data are available on how stiffness and stability of the knee ligament complex are weakened by such release.MethodsAfter total knee arthroplasty, ten healthy Thiel-fixed knee joints were subjected to sequential medial release consisting of six release steps. After each step, stiffness and stability were determined at 0 degrees, 30 degrees, 60 degrees, and 90 degrees.ResultsSequential medial release increasingly weakened the ligament complex. In extension, release of the anteromedial tibial sleeve 4cm below the joint line already weakened the ligament complex by approximately 13%. Release 6cm below the joint line reduced stiffness and stability by 15-20% over the entire range of motion. After detachment of the medial collateral ligament, stability was only about 60% of its initial value.ConclusionOur study showed for the first time the association between medial release and stiffness and stability of the knee ligament complex. To maintain stability, vigorous detachment of the knee ligament complex should be avoided. Release of the anteromedial tibial sleeve already initiates loss of stability. The main stabiliser is the medial ligament, which should never be completely detached.Level of evidenceIV.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SOFT-TISSUE RELEASE; STRUCTURAL-PROPERTIES; COLLATERAL LIGAMENT; ANATOMY; SAFE; Medial release; Knee balancer; Ligament balance; Ligament stiffness; Soft-tissue balance; Total knee arthroplasty |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Orthopädie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 06 Apr 2020 07:06 |
| Last Modified: | 06 Apr 2020 07:07 |
| URI: | https://pred.uni-regensburg.de/id/eprint/26789 |
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