Abstract
Purpose
Patellofemoral syndrome is still a common complication after total knee arthroplasty (TKA). However, the effects of specific surgical approaches on patellar tracking and alignment remain incompletely understood. In this study, we compared patellar alignment in patients who underwent TKA via three different techniques.
Methods
A total of 96 patients who completed a minimum follow-up of five years were involved in three groups: 30 patients were treated with the traditional medial parapatellar approach (MPP group), 35 patients were treated with the mini-medial parapatellar approach (MMP group) and 31 were treated with a quadriceps-sparing approach (QS group). Radiographic data for patellar alignment and clinical results were compared.
Results
Patellar tilt and patellar displacement at the final follow-up evaluation differed significantly among the three groups [P < 0.01, analysis of variance (ANOVA)]. The MMP and QS groups exhibited more proper patellar alignment than the MPP group. The clinical results did not differ significantly among the groups (P > 0.05, ANOVA). In addition, there were no correlations between postoperative patellar alignment and clinical scores.
Conclusions
The results of this study indicate that TKA performed using minimally invasive approaches yields superior patellar alignment compared to the traditional MPP approach.
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Acknowledgments
This study was funded by the Beijing Science and Technology Planning Projects of Beijing Science and Technology Committee (No. Z131100005213004), Instrument Research Project of the National Natural Science Foundation (No. 81327001). We thank Medjaden Bioscience for their language editing which greatly improved the manuscript.
Conflict of interest
The authors declare that they have no conflict of interest. No benefits in any form have been received or will be received from a commercial party related directly or indirectly to the subject of this article.
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Ai-Bing Huang and Hai-Jun Wang contributed equally to this work.
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Huang, AB., Wang, HJ., Yu, JK. et al. Optimal patellar alignment with minimally invasive approaches in total knee arthroplasty after a minimum five year follow-up. International Orthopaedics (SICOT) 40, 487–492 (2016). https://doi.org/10.1007/s00264-015-2896-2
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DOI: https://doi.org/10.1007/s00264-015-2896-2