Abstract：
OBJECTIVE: Robotic-assisted medial unicompartmental knee arthroplasty (UKA) can ensure precise preoperative planning, minimise soft tissue damage and restore native coronal alignment. However, few studies have investigated how these advantages translate into differences in early postoperative outcomes. This study aimed to compare differences in early outcomes between conventional UKA (C-UKA) and robotic-assisted UKA (R-UKA).
METHODS: This retrospective study investigated two groups of patients who underwent medial UKA: C-UKA group (n = 35) and R-UKA group (n = 35). We assessed (1) serum indicators (hemoglobin, creatine kinase and C-reactive protein) and pain visual analogue scale (VAS) at postoperative days (PODs) 1, 2, 4 and 6; (2) radiologic parameters including joint line height change and arithmetic and mechanical hip-knee-ankle angle (aHKA and mHKA); (3) patient-reported outcomes including Knee Society Scores, Western Ontario and Mcmaster Universities Arthritis Index (WOMAC) and Forgotten Joint Score-12 (FJS-12) at 1-year follow-up.
RESULTS: Despite similar serum indicator results, pain VAS was lower in the R-UKA group than in the C-UKA group at PODs 2 (2.5 ± 1.3 vs. 3.6 ± 1.2, p = 0.02), 4 (2.4 ± 0.9 vs. 3.3 ± 1.0, p = 0.03) and 6 (1.9 ± 1.1 vs. 3.1 ± 1.1, p < 0.01). The joint line height change was significantly lower in the R-UKA group than in the C-UKA group (0.9 mm ± 0.6 mm vs. 2.0 mm ± 1.3 mm, p = 0.02). The equivalence test for preoperative aHKA and postoperative mHKA revealed equivalence in only the R-UKA group (p < 0.01). The R-UKA group showed better WOMAC and FJS-12 compared to C-UKA group at 1-year follow-up.
CONCLUSIONS: R-UKA led to lower pain VAS in the early postoperative period compared with C-UKA. Additionally, R-UKA effectively restored the joint line and prearthritic lower limb alignment, resulting in superior functional outcomes at 1-year follow-up compared with C-UKA.
METHODS: Level III.
METHODS: This retrospective study investigated two groups of patients who underwent medial UKA: C-UKA group (n = 35) and R-UKA group (n = 35). We assessed (1) serum indicators (hemoglobin, creatine kinase and C-reactive protein) and pain visual analogue scale (VAS) at postoperative days (PODs) 1, 2, 4 and 6; (2) radiologic parameters including joint line height change and arithmetic and mechanical hip-knee-ankle angle (aHKA and mHKA); (3) patient-reported outcomes including Knee Society Scores, Western Ontario and Mcmaster Universities Arthritis Index (WOMAC) and Forgotten Joint Score-12 (FJS-12) at 1-year follow-up.
RESULTS: Despite similar serum indicator results, pain VAS was lower in the R-UKA group than in the C-UKA group at PODs 2 (2.5 ± 1.3 vs. 3.6 ± 1.2, p = 0.02), 4 (2.4 ± 0.9 vs. 3.3 ± 1.0, p = 0.03) and 6 (1.9 ± 1.1 vs. 3.1 ± 1.1, p < 0.01). The joint line height change was significantly lower in the R-UKA group than in the C-UKA group (0.9 mm ± 0.6 mm vs. 2.0 mm ± 1.3 mm, p = 0.02). The equivalence test for preoperative aHKA and postoperative mHKA revealed equivalence in only the R-UKA group (p < 0.01). The R-UKA group showed better WOMAC and FJS-12 compared to C-UKA group at 1-year follow-up.
CONCLUSIONS: R-UKA led to lower pain VAS in the early postoperative period compared with C-UKA. Additionally, R-UKA effectively restored the joint line and prearthritic lower limb alignment, resulting in superior functional outcomes at 1-year follow-up compared with C-UKA.
METHODS: Level III.
摘要：
目的：机器人辅助内侧单室膝关节置换术（UKA）可以确保精确的术前计划，最大限度地减少软组织损伤并恢复天然冠状排列。然而,很少有研究调查这些优势如何转化为术后早期结局的差异.本研究旨在比较传统UKA（C-UKA）和机器人辅助UKA（R-UKA）早期结果的差异。
方法：这项回顾性研究调查了两组接受内侧UKA的患者：C-UKA组（n=35）和R-UKA组（n=35）。我们评估了（1）血清指标（血红蛋白，肌酸激酶和C反应蛋白）和术后第1、2、4和6天的疼痛视觉模拟评分（VAS）；（2）放射学参数，包括关节线高度变化和算术和机械髋-膝-踝角度（aHKA和mHKA）；（3）患者报告的结果，包括KSocietynee评分，在1年的随访中，西安大略省和麦克马斯特大学关节炎指数（WOMAC）和被遗忘的联合评分12（FJS-12）。
结果：尽管血清指标结果相似，在PODs2时，R-UKA组的疼痛VAS低于C-UKA组（2.5±1.3vs.3.6±1.2，p=0.02)，4(2.4±0.9vs.3.3±1.0，p=0.03）和6（1.9±1.1与3.1±1.1，p<0.01)。R-UKA组的关节线高度变化明显低于C-UKA组（0.9mm±0.6mmvs.2.0mm±1.3mm,p=0.02)。术前aHKA和术后mHKA的等效性检验显示，仅R-UKA组等效（p<0.01）。在1年的随访中，与C-UKA组相比，R-UKA组显示出更好的WOMAC和FJS-12。
结论：与C-UKA相比，R-UKA术后早期疼痛VAS降低。此外,R-UKA有效地恢复了关节线和关节炎前下肢的对齐，与C-UKA相比，在1年随访时具有更好的功能结局。
方法：三级。
方法：这项回顾性研究调查了两组接受内侧UKA的患者：C-UKA组（n=35）和R-UKA组（n=35）。我们评估了（1）血清指标（血红蛋白，肌酸激酶和C反应蛋白）和术后第1、2、4和6天的疼痛视觉模拟评分（VAS）；（2）放射学参数，包括关节线高度变化和算术和机械髋-膝-踝角度（aHKA和mHKA）；（3）患者报告的结果，包括KSocietynee评分，在1年的随访中，西安大略省和麦克马斯特大学关节炎指数（WOMAC）和被遗忘的联合评分12（FJS-12）。
结果：尽管血清指标结果相似，在PODs2时，R-UKA组的疼痛VAS低于C-UKA组（2.5±1.3vs.3.6±1.2，p=0.02)，4(2.4±0.9vs.3.3±1.0，p=0.03）和6（1.9±1.1与3.1±1.1，p<0.01)。R-UKA组的关节线高度变化明显低于C-UKA组（0.9mm±0.6mmvs.2.0mm±1.3mm,p=0.02)。术前aHKA和术后mHKA的等效性检验显示，仅R-UKA组等效（p<0.01）。在1年的随访中，与C-UKA组相比，R-UKA组显示出更好的WOMAC和FJS-12。
结论：与C-UKA相比，R-UKA术后早期疼痛VAS降低。此外,R-UKA有效地恢复了关节线和关节炎前下肢的对齐，与C-UKA相比，在1年随访时具有更好的功能结局。
方法：三级。
