ArticleOrthopadie (Heidelberg, Germany)2026
Comparative analysis of functional outcomes between cruciate-retaining and posterior-stabilized knee prostheses in obese patients.
Article in Orthopadie (Heidelberg, Germany), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundObesity is a well-recognized risk factor for knee osteoarthritis and contributes to the increasing demand for total knee arthroplasty (TKA). Excess body weight alters gait mechanics, increases joint loading, and accelerates degeneration, potentially compromising outcomes. Although cruciate-retaining (CR) and posterior-stabilized (PS) prostheses are widely used, their comparative outcomes in obese patients remain controversial. This study aimed to compare outcomes of CR versus PS prostheses in obese patients undergoing primary TKA.
methodsA retrospective cohort study included 79 knees from 56 obese female patients (BMI > 30 kg/m
resultsThe mean follow-up was 41.3 ± 20.8 months. Both groups showed significant postoperative improvement in all clinical scores (p < 0.01). The PS group achieved greater postoperative range of motion (ROM) (p = 0.035) and higher KSS-knee scores (p = 0.022). No significant differences were observed in VAS, Lysholm, or KSS-function scores. Radiolucent lines were noted in 8.9% of knees without migration or loosening. Prosthesis survival was 100% in both groups.
conclusionBoth CR and PS implants yield satisfactory outcomes in obese patients undergoing TKA. PS designs may provide superior range of motion and functional recovery. Further prospective studies are needed to confirm these findings.
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