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Abstract：
BACKGROUND: This retrospective medium-term follow-up study compares the outcomes of medial fixed-bearing unicompartmental knee arthroplasty (mUKA) using a cemented metal-backed (MB) or an all-polyethylene (AP) tibial component.
METHODS: The database of our institution was mined for primary mUKA patients implanted with an MB or an AP tibial component (the MB-UKA and AP-UKA groups, respectively) from 2015 to 2018. We compared patient demographics, patient-reported outcome measures (PROMs), and motion analysis data obtained with the Riablo™ system (CoRehab, Trento, Italy). We conducted propensity-score-matching (PSM) analysis (1:1) using multiple variables.
RESULTS: PSM analysis yielded 77 pairs of MB-UKA and AP-UKA patients. At 5 years, the physical component summary (PCS) score was 52.4 ± 8.3 in MB-UKA and 48.2 ± 8.3 in AP-UKA patients (p < 0.001). The Forgotten Joint Score (FJS-12) was 82.9 ± 18.8 in MB-UKAs and 73.4 ± 22.5 in AP-UKAs (p = 0.015). Tibial pain was reported by 7.8% of the MB-UKA and 35.1% of the AP-UKA patients (p < 0.001). Static postural sway was, respectively, 3.9 ± 2.1 cm and 5.4 ± 2.3 (p = 0.0002), and gait symmetry was, respectively, 92.7% ± 3.7 cm and 90.4% ± 5.4 cm (p = 0.006). Patient satisfaction was 9.2 ± 0.8 in the MB-UKA and 8.3 ± 2.0 in the AP-UKA group (p < 0.003).
CONCLUSIONS: MB-UKA patients experienced significantly better 5-year static sway and gait symmetry outcomes than AP-UKA patients. Although the PROMs of the two groups overlapped, MB-UKA patients had a lower incidence of tibial pain, better FJS-12 and PCS scores, and were more satisfied.
METHODS: The database of our institution was mined for primary mUKA patients implanted with an MB or an AP tibial component (the MB-UKA and AP-UKA groups, respectively) from 2015 to 2018. We compared patient demographics, patient-reported outcome measures (PROMs), and motion analysis data obtained with the Riablo™ system (CoRehab, Trento, Italy). We conducted propensity-score-matching (PSM) analysis (1:1) using multiple variables.
RESULTS: PSM analysis yielded 77 pairs of MB-UKA and AP-UKA patients. At 5 years, the physical component summary (PCS) score was 52.4 ± 8.3 in MB-UKA and 48.2 ± 8.3 in AP-UKA patients (p < 0.001). The Forgotten Joint Score (FJS-12) was 82.9 ± 18.8 in MB-UKAs and 73.4 ± 22.5 in AP-UKAs (p = 0.015). Tibial pain was reported by 7.8% of the MB-UKA and 35.1% of the AP-UKA patients (p < 0.001). Static postural sway was, respectively, 3.9 ± 2.1 cm and 5.4 ± 2.3 (p = 0.0002), and gait symmetry was, respectively, 92.7% ± 3.7 cm and 90.4% ± 5.4 cm (p = 0.006). Patient satisfaction was 9.2 ± 0.8 in the MB-UKA and 8.3 ± 2.0 in the AP-UKA group (p < 0.003).
CONCLUSIONS: MB-UKA patients experienced significantly better 5-year static sway and gait symmetry outcomes than AP-UKA patients. Although the PROMs of the two groups overlapped, MB-UKA patients had a lower incidence of tibial pain, better FJS-12 and PCS scores, and were more satisfied.
摘要：
背景：这项回顾性中期随访研究比较了使用胶结金属背衬（MB）或全聚乙烯（AP）胫骨组件的内侧固定轴承单室膝关节置换术（mUKA）的结果。
方法：我们机构的数据库是针对植入MB或AP胫骨组件的原发性mUKA患者（MB-UKA和AP-UKA组，分别）从2015年到2018年。我们比较了病人的人口统计,患者报告结果测量(PROMs)，和使用Riablo™系统获得的运动分析数据(CoRehab，特伦托,意大利）。我们使用多个变量进行了倾向得分匹配（PSM）分析（1：1）。
结果：PSM分析得出77对MB-UKA和AP-UKA患者。在5年,MB-UKA患者的物理成分汇总(PCS)评分为52.4±8.3,AP-UKA患者为48.2±8.3(p<0.001).MB-UKAs中的遗忘关节评分（FJS-12）为82.9±18.8，AP-UKAs中的遗忘关节评分为73.4±22.5（p=0.015）。据报道，胫骨疼痛占MB-UKA患者的7.8%和AP-UKA患者的35.1%(p<0.001)。静态姿势摇摆是，分别,3.9±2.1厘米和5.4±2.3（p=0.0002），步态对称，分别,92.7%±3.7cm和90.4%±5.4cm(p=0.006)。MB-UKA组患者满意度为9.2±0.8，AP-UKA组为8.3±2.0（p<0.003）。
结论：MB-UKA患者的5年静态摇摆和步态对称性结果明显优于AP-UKA患者。尽管两组的PROM重叠，MB-UKA患者的胫骨疼痛发生率较低，更好的FJS-12和PCS分数，更满意。
方法：我们机构的数据库是针对植入MB或AP胫骨组件的原发性mUKA患者（MB-UKA和AP-UKA组，分别）从2015年到2018年。我们比较了病人的人口统计,患者报告结果测量(PROMs)，和使用Riablo™系统获得的运动分析数据(CoRehab，特伦托,意大利）。我们使用多个变量进行了倾向得分匹配（PSM）分析（1：1）。
结果：PSM分析得出77对MB-UKA和AP-UKA患者。在5年,MB-UKA患者的物理成分汇总(PCS)评分为52.4±8.3,AP-UKA患者为48.2±8.3(p<0.001).MB-UKAs中的遗忘关节评分（FJS-12）为82.9±18.8，AP-UKAs中的遗忘关节评分为73.4±22.5（p=0.015）。据报道，胫骨疼痛占MB-UKA患者的7.8%和AP-UKA患者的35.1%(p<0.001)。静态姿势摇摆是，分别,3.9±2.1厘米和5.4±2.3（p=0.0002），步态对称，分别,92.7%±3.7cm和90.4%±5.4cm(p=0.006)。MB-UKA组患者满意度为9.2±0.8，AP-UKA组为8.3±2.0（p<0.003）。
结论：MB-UKA患者的5年静态摇摆和步态对称性结果明显优于AP-UKA患者。尽管两组的PROM重叠，MB-UKA患者的胫骨疼痛发生率较低，更好的FJS-12和PCS分数，更满意。
