Isaac Dayan1, Michael J Moses2, Parthiv Rathod1, Ajit Deshmukh1, Scott Marwin1, Alan J Dayan1. 1. Department of Orthopedic Surgery, Division of Adult Reconstruction, New York University Langone Orthopedic Hospital, 301 East 17th Street, Room 1402, New York, NY, 10003, USA. 2. Department of Orthopedic Surgery, Division of Adult Reconstruction, New York University Langone Orthopedic Hospital, 301 East 17th Street, Room 1402, New York, NY, 10003, USA. michael.moses@med.nyu.edu.
Abstract
PURPOSE: There has been an increase in the use of unlinked constrained condylar knee (CCK) prostheses in primary total knee arthroplasty (TKA) for cases with significant deformities that cannot be adequately balanced in flexion and extension. However, the literature on its outcomes is limited. The goal of this study is to evaluate whether there are any clinic or radiographic outcome differences for a primary, non-stemmed, unlinked constrained TKA as compared to a control group of posterior-stabilized (PS) TKA using the same implant design. METHODS: Clinical and radiographic outcome measures for 404 cemented, non-stemmed, primary TKAs performed by two surgeons at the same institution were retrospectively reviewed. All patients underwent primary, non-stemmed components; 241 used CCK inserts and 163 used PS inserts. Preoperative deformity, knee society scores (KSS), range-of-motion (ROM), radiographic data and revision rates were compared between the CCK and PS groups. RESULTS: Both groups had comparable demographics and preoperative ROM and KSS. At similar mean follow-up times (6.1 ± 1.0 years for the CCK group and 6.3 ± 1.2 years for the PS group), no significant difference was found in ROM, KSS or radiographic outcomes. Revision rates were higher for the CCK group (2%) as compared to the HF-PS (0.6%) group (n.s). CONCLUSIONS: The particular design of cemented, primary, non-stemmed, unlinked CCK-TKA examined in this study provided similar clinical and radiographic outcomes to that of PS-TKA at midterm follow-up. LEVEL OF EVIDENCE: III.
PURPOSE: There has been an increase in the use of unlinked constrained condylar knee (CCK) prostheses in primary total knee arthroplasty (TKA) for cases with significant deformities that cannot be adequately balanced in flexion and extension. However, the literature on its outcomes is limited. The goal of this study is to evaluate whether there are any clinic or radiographic outcome differences for a primary, non-stemmed, unlinked constrained TKA as compared to a control group of posterior-stabilized (PS) TKA using the same implant design. METHODS: Clinical and radiographic outcome measures for 404 cemented, non-stemmed, primary TKAs performed by two surgeons at the same institution were retrospectively reviewed. All patients underwent primary, non-stemmed components; 241 used CCK inserts and 163 used PS inserts. Preoperative deformity, knee society scores (KSS), range-of-motion (ROM), radiographic data and revision rates were compared between the CCK and PS groups. RESULTS: Both groups had comparable demographics and preoperative ROM and KSS. At similar mean follow-up times (6.1 ± 1.0 years for the CCK group and 6.3 ± 1.2 years for the PS group), no significant difference was found in ROM, KSS or radiographic outcomes. Revision rates were higher for the CCK group (2%) as compared to the HF-PS (0.6%) group (n.s). CONCLUSIONS: The particular design of cemented, primary, non-stemmed, unlinked CCK-TKA examined in this study provided similar clinical and radiographic outcomes to that of PS-TKA at midterm follow-up. LEVEL OF EVIDENCE: III.
Entities:
Keywords:
Arthritis; Constrained; Follow-up; Knee; Knee replacement; Non-stemmed; Orthopedics; Osteoarthritis; Outcomes; Primary total knee arthroplasty; Surgery; Total knee arthroplasty; Unlinked
Authors: Rodrigo Sattamini Pires E Albuquerque; Pedro Guilme Teixeira DE Sousa Filho; Rui Felipe Pache DE Moraes; Dalton Roberto DE Melo Franco Filho; Allan Mozella; Hugo Cobra; Vinicius Schott Gameiro Journal: Acta Ortop Bras Date: 2022-08-26 Impact factor: 0.683