Two-Year Clinical and Patient Reported Outcomes of a Kinematically Designed Cruciate Retaining Total Knee Arthroplasty with a Novel Liner Design
Journal Title: Journal of Orthopaedic Science and Research - Year 2025, Vol 6, Issue 1
Abstract
Introduction: Implants designed for Cruciate Retaining (CR) Total Knee Arthroplasty (TKA) are a relatively novel development. Medial dished tibial inserts have a more constraining medial side, which allows for similar kinematics and function to a native knee. The purpose of this study was to analyze clinical and patient-reported outcomes following CR TKA using a kinematically-designed system. Methods: A multicenter retrospective review of 139 patients who underwent primary elective TKA utilizing a novel kinematically designed CR Knee System (JOURNEY™ II CR Medial Dished; Smith and Nephew, Memphis, TN) between February 2022 and July 2023 was conducted. Patients from three different institutions with at least two years of follow-up were included in this study. Demographic information, clinical outcomes and Patient-Reported Outcome Measures (PROMs) were collected and analyzed. Results: Our study included 139 TKA patients. The average age was 66.1 years and 37.4% of patients were male and 62.6% were female. The primary diagnosis for all patients was primary Osteoarthritis (OA). The average length of stay was 1.3 days and 95% of patients were discharged home. The remaining 5% went to a Skilled Nursing Facility (SNF). Within 90 days of surgery, two patients visited the Emergency Department (1.4%) and six patients were readmitted (4.3%). The two-year implant survivorship rate was 98.6%, with two patients undergoing revisions: one for Periprosthetic Joint Infection (PJI) and one for wound dehiscence. The average increase in KOOS, JR scores from preoperative to two-years postoperative (25.9) reached the minimal clinically important difference (16.2 to 35.6). Conclusion: The high survivorship rate and significant increase in PROMs indicates that a medially constrained, CR tibial insert is a safe and effective option for use in TKA. Further research is warranted in studying long-term survivorship.
Authors and Affiliations
Zoe Alpert1, Farouk Khury1,2, Nicholas Sauder3, Alan Lam4, Greta Laudes1, Christopher Melnic3, Chad Krueger4, Ran Schwarzkopf1*
Keywords
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- EP ID EP759973
- DOI https://doi.org/10.46889/JOSR.2025.6106
- Views 11
- Downloads 0
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