@article {MoisanE103, author = {Philippe Moisan and Bardia Barimani and Mohammed Al Kindi and Jennifer Mutch and Anthony Albers}, title = {Semiconstrained posterior-stabilized total knee arthroplasty: indications, risks and benefits in primary and revision surgery}, volume = {66}, number = {2}, pages = {E103--E108}, year = {2023}, doi = {10.1503/cjs.000622}, publisher = {Canadian Journal of Surgery}, abstract = {Background: The constrained posterior-stabilized (CPS) implant for use in total knee arthroplasty (TKA) has a constraint level midway between that of a posterior-stabilized implant and a valgus{\textendash}varus{\textendash}constrained implant; there is currently no consensus on the surgical indications for use of this degree of constraint. We present our experience using this implant at our centre.Methods: We reviewed the charts of patients who received a CPS polyethylene insert during TKA in our centre between January 2016 and April 2020. We collected patient demographic characteristics, surgical indications, pre- and postoperative radiographs, and complications.Results: A total of 85 patients (74 females and 11 males with a mean age of 73 yr [standard deviation 9.4 yr, range 36{\textendash}88 yr]) (85 knees) received a CPS insert over the study period. Of the 85 cases, 80 (94\%) were primary TKA and 5 (6\%) were revision TKA. The most common indications for primary CPS use were severe valgus deformity with medial soft-tissue laxity (29 patients [34\%]), medial soft-tissue laxity without substantial deformity (27 [32\%]) and severe varus deformity with lateral soft-tissue laxity (13 [15\%]). The indications for the 5 patients who underwent revision TKA were medial laxity (4 patients) and an iatrogenic lateral condyle fracture (1 patient). Four patients had postoperative complications. The 30-day return to hospital rate was 2.3\% (owing to infection and hematoma). A single patient required revision surgery for periprosthetic joint infection.Conclusion: We found excellent short-term survivorship of the CPS polyethylene insert when used for a spectrum of coronal plane ligamentous imbalances with or without pre-operative coronal plane deformities. Long-term follow-up of these cases will be important to identify adverse outcomes such as loosening or polyethylene-related problems.}, issn = {0008-428X}, URL = {https://www.canjsurg.ca/content/66/2/E103}, eprint = {https://www.canjsurg.ca/content/66/2/E103.full.pdf}, journal = {Canadian Journal of Surgery} }