术前不同程度下肢力线内翻畸形对单髁置换术后短期疗效的影响分析

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Abstract Objective To explore the effect of preoperative lower limb alignment in different degrees varus deformity after unicompartmental knee arthroplasty.Methods A total of 99 patients (131 knees) who underwent unicompartmental knee arthroplasty were selected from March 2018 to September 2019，including 29 males (37 knees) and 70 females (94 knees).The average age was (64.79±7.71).The average body mass index (BMI) was (26.17±4.04)kg／m².Patients were divided into three groups according to preoperative HKA(hip-knee-ankle angle)，0°<HKA≤5°for mild varus (Group A)，5°<HKA≤10° for moderate varus (Group B)，and 10°<HKA≤15° for severe varus (Group C).The postoperative HKA，preoperative and postoperative Oxford knee score (OKS)，pain visual analogue scale (VAS) and range of motion (ROM) of knee joint results of the three groups were compared，and the correlation between the observation indexes and preoperative HKA were analyzed.Results All patients were followed up for 12~30 months，an average of (19.01±3.80) months.There were statistically significant differences in OKS，VAS，ROM，the lower limb alignment varus deformity between preoperation and last follow-up(P＜0.05).There were statistically significant differences in preoperative OKS，VAS and ROM(P＜0.05).The postoperative HKA was(2.80±1.82)°in group A，(3.16±1.47)° in group B and (4.79±1.84)°in group C.There was statistically significant difference of postoperative HKA among three groups (P＜0.05).There were no statistically significant differences in postoperative OKS，VAS and ROM at the last follow-up among the three groups (P＞0.05).Preoperative HKA was significantly correlated with postoperative HKA，preoperative OKS and preoperative ROM (P＜0.05).Conclusion Different degrees of preoperative lower limb alignment varus deformity has a significant correlation with the preoperative knee function and postoperative lower limb alignment，different varus deformity preoperatively do not affect the short-term clinical efficacy after unicompartmental knee arthroplasty (range of 0°~15°).

Key words： unicompartmental knee arthroplasty knee lower limb alignment genu varum

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