Unicompartmental knee arthroplasty revisions to total knee arthroplasty : good outcomes at mid-term follow-up.

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Abstract

[Indexed for MEDLINE] Conflict of interest statement: C. K. Ledford reports consulting fees from Stryker, unrelated to this study. N. A. Bedard reports consulting fees from Stryker, unrelated to this study. R. J. Sierra reports royalites or licenses from Zimmer Biomet, OrthAlign, and Link Orthopedics and consulting fees from Medacta, all of which are unrelated to this study. C. P. Hannon reports royalties or licenses from Zimmer Biomet and consulting fees from Orchard Medical, Signature Orthopedics, Enovis, and Vertex Pharmaceuticals, all of which are unrelated to this study. M. P. Abdel reports royalties or licenses from Stryker, OsteoRemedies, and Springer, unrelated to this study. 20. Acta Biomed. 2017 Jun 7;88(2S):112-117. doi: 10.23750/abm.v88i2-S.6521. Varus-valgus constrained implants in total knee arthroplasty: indications and technique. Adravanti P(1), Vasta S. Author information: (1). info@paoloadravanti.com. Total knee arthroplasty is a successful operation that significantly improves patient's quality of life. However, studies demonstrated as only 82% to 89% of patients are satisfied with their surgery, being the other disappointed with regard to their expectations. Two to 5.7% of total knee arthroplasties (TKAs) require revision within 5 years. Both complex primary cases and revision TKA often necessitate for a higher degree of constrain than cruciate retaining or postero-stabilized implant design. In the 1970s varus-valgus constrained (VVC) or semi-constrained implants have been developed by Insall and associates from the PS design, which provide varus-valgus stability preserving a fair amount of host bone. VVC TKAs allows for a small amount of movement in the coronal, antero-posterior and axial planes. In this paper, the authors give an overview of the indications, outcomes and technique for varus-valgus constrained implants, both in the setting of primary and revision knee arthroplasty. DOI: 10.23750/abm.v88i2-S.6521 PMCID: PMC6178999