To assess the clinical consequences of femoral and tibial component overhang and quantify the association between mediolateral sizing and clinical outcomes such as residual knee pain, functional mobility, and knee flexion.
Key Findings:
Femoral component overhang was associated with increased residual pain after TKA, indicating a need for careful sizing.
Narrower femoral implants did not consistently improve clinical outcomes, suggesting variability in patient responses.
A threshold for oversizing exists beyond which negative clinical effects are observed, warranting further investigation.
Interpretation:
The study suggests that mediolateral oversizing of TKA components negatively impacts pain, function, and flexion, highlighting the importance of individualized implant sizing.
Limitations:
Retrospective design may introduce bias, limiting causal inferences.
Exclusion of patients with certain conditions may limit generalizability of findings to broader populations.
Potential inaccuracies in CT measurements, despite high reliability, could affect the validity of the results.
Conclusion:
Mediolateral oversizing in TKA can adversely affect clinical outcomes, emphasizing the need for careful consideration of implant sizing relative to individual anatomy.
