Outcomes of Posterior-Stabilized Compared with Cruciate-Retaining Total Knee Arthroplasty

J Knee Surg DOI: 10.1055/s-0037-1603902The aim of this systematic review is to compare clinical outcome scores, rate of complications, and range of motion (ROM) of posterior-stabilized (PS) and cruciate-retaining (CR) total knee arthroplasties (TKAs) both pre- and postoperatively to establish which of the two kinds of implants have the best efficiency. A comprehensive search was performed of studies comparing CR and PS TKAs on PubMed, OVID/Medline, Cochrane, CINAHL, Google scholar, and Embase databases. Finally, 37 studies were selected with a total of 5,407 knees in 4,445 patients. For the PS knees, the Knee Society functional score (KSFS) improved from 44.6 to 77.6 (p = 0.04), extension decreased from 6.6 to 1.8 degrees (p-value), and flexion increased from 115.2 to 119.4 degrees (p < 0.00001), compared with the CR knees. No significant difference in the Knee Society objective score (KSOS) (p = 0.82) or complication rates (p = 0.29) was found. The overall complication rate was 3.9%, 213 in 5,407 knees. Surgeons must be careful in interpreting these results, as an improved ROM for the PS group may not correlate to better patient outcomes. This meta-analysis has demonstrated that PS TKA has a statistically significant greater postoperative improvement of KSFS (p = 0.04), flexion (p < 0.00001), and extension (p = 0.02), compared with the CR group. These findings seem to lead the surgeons to prefer the PS design for TKAs especially to achieve a...
Source: Journal of Knee Surgery - Category: Orthopaedics Authors: Tags: Original Article Source Type: research