Leg length discrepancy following bilateral knee arthroplasty (UKA with TKA)
Refereed conference paper presented and published in conference proceedings
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摘要Introduction: Leg length discrepancy (LLD) is frequently discussed and has been shown to be related to poorer functional outcome in hip arthroplasties. Though less frequent, LLD after total knee arthroplasties (TKA) has been shown to occur. It has also been reported that significant LLD after TKA can lead to inferior functional outcomes. Of note, there are limited studies documenting LLD in patients who have undergone bilateral knee arthroplasties. This study investigates the incidence of LLD in patients following bilateral knee arthroplasties, specifically cases with a unicompartmental knee arthroplasty (UKA) and a contralateral TKA; attempting to identify correlations between leg length and the post-operative limb and joint line alignments.
Methods: From 2018-2021, 42 patients were identified, with a mean age of 70 years and a mean follow up period of 23 months. Radiological LLD, the mechanical tibial-femoral angle (mTFA), and the joint line obliquity angle (JLOA) were all measured using standing lower limb scannograms.
Results: Of the 42 patients, 16 patients had a longer limb on the UKA side, while 25 patients had a longer limb on the TKA side; however, only 7 patients had a radiological LLD of ≥1 cm. There is a statistically significant positive correlation between left-right mTFA difference and LLD in cases where the TKA is longer; and between left-right JLOA difference and LLD in cases where the UKA is longer.
Conclusion: Despite the correlation above, this study has found no statistically significant correlation between postoperative LLD and functional scores.
Methods: From 2018-2021, 42 patients were identified, with a mean age of 70 years and a mean follow up period of 23 months. Radiological LLD, the mechanical tibial-femoral angle (mTFA), and the joint line obliquity angle (JLOA) were all measured using standing lower limb scannograms.
Results: Of the 42 patients, 16 patients had a longer limb on the UKA side, while 25 patients had a longer limb on the TKA side; however, only 7 patients had a radiological LLD of ≥1 cm. There is a statistically significant positive correlation between left-right mTFA difference and LLD in cases where the TKA is longer; and between left-right JLOA difference and LLD in cases where the UKA is longer.
Conclusion: Despite the correlation above, this study has found no statistically significant correlation between postoperative LLD and functional scores.
著者Kelvin Chin-Hei Lo, Gloria Yan-Ting Lam, Tsz Lung Choi, Jonathan Patrick Ng, Michael Tim-Yun Ong, Patrick Shu-Hang Yung
會議名稱The HKOA 43rd Annual Congress of The Hong Kong Orthopaedic Association
會議開始日04.11.2023
會議完結日05.11.2023
會議地點Hong Kong
會議國家/地區香港
出版年份2023
月份11
出版社Hong Kong Academy of Medicine Press
出版地Hong Kong
頁次85 - 85
語言美式英語
