No difference in failure rates or clinical outcomes between non-stemmed constrained condylar prostheses and posterior-st
- PDF / 511,628 Bytes
- 6 Pages / 595.276 x 790.866 pts Page_size
- 18 Downloads / 169 Views
KNEE
No difference in failure rates or clinical outcomes between non‑stemmed constrained condylar prostheses and posterior‑stabilized prostheses for primary total knee arthroplasty Isaac Dayan1 · Michael J. Moses1 · Parthiv Rathod1 · Ajit Deshmukh1 · Scott Marwin1 · Alan J. Dayan1 Received: 4 February 2019 / Accepted: 19 August 2019 © European Society of Sports Traumatology, Knee Surgery, Arthroscopy (ESSKA) 2019
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. Keywords Constrained · Non-stemmed · Outcomes · Primary total knee arthroplasty · Unlinked · Knee · Total knee arthroplasty · Knee replacement · Follow-up · Orthopedics · Surgery · Arthritis · Osteoarthritis
Introduction As the United States population continues to age, there will be an exponential increase in the number of total knee arthroplasties performed annually [13]. The majority of primary total knee arthroplasties (TKA) are performed using either a posterior-stabilized (PS) or cruciate-retaining (CR) polyethylene component with similar long-term * Michael J. Moses [email protected] 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
survivorships [5, 9, 19, 30]. In cases of severe bone loss which would prevent adequate fixation of components or ligamentous laxity of the collateral ligaments, both of which more commonly occur in revision arthroplasty cases and at times in primary TKA, there is a need for constrained, unli
Data Loading...
