Abstract：
While considered a satisfactory solution, unicompartmental knee arthroplasty (UKA) still raises concerns in regard to its durability. These concerns particularly focus on the tibial component. This study aims to compare two different cemented tibial components belonging to the same UKA design: all polyethylene (AP) versus metal backed (MB), at a long-term follow-up.
We retrospectively reviewed 143 successive patients, 83 of which underwent surgery with AP tibial component UKA (37 males, 46 females), and 67 with MB ones (17 males, 50 females). All implants had the same prosthetic design (Accuris UKA, Smith e Nephew) with identical femoral oxinium component but different tibial component, AP or MB. The KSS and KOOS were assessed at a mean of 11.5-year follow-up and compared to pre-operative, post-operative, and one year evaluation. Statistical analysis was performed with SPSS for Mac (version 17.0). To assess potential statistically significant differences, t test was used and significance was set at P < 0.05.
Final KSS at a mean of 11.5-year follow-up was 94.27 for the AP group and 96.12 for the MB ones. The final KOOS was 87 for AP components and 89.67 for the MB group. These results demonstrated, in all cases, statistically significant better results for MB tibial components compared to AP regarding KSS (P = 0.048), KOOS (P = 0.000), and pain (P = 0.014) at the 11.5-year follow-up. Survivorship for AP tibial component implants was 97.6%, while it was 89.5% for MB ones.
While the survivorship rate has been found to be greater for AP implants compared to MB tibial components, this study reveals statistically better functional results according to KSS and KOOS, and pain, at a long-term follow-up for MB implants.
We retrospectively reviewed 143 successive patients, 83 of which underwent surgery with AP tibial component UKA (37 males, 46 females), and 67 with MB ones (17 males, 50 females). All implants had the same prosthetic design (Accuris UKA, Smith e Nephew) with identical femoral oxinium component but different tibial component, AP or MB. The KSS and KOOS were assessed at a mean of 11.5-year follow-up and compared to pre-operative, post-operative, and one year evaluation. Statistical analysis was performed with SPSS for Mac (version 17.0). To assess potential statistically significant differences, t test was used and significance was set at P < 0.05.
Final KSS at a mean of 11.5-year follow-up was 94.27 for the AP group and 96.12 for the MB ones. The final KOOS was 87 for AP components and 89.67 for the MB group. These results demonstrated, in all cases, statistically significant better results for MB tibial components compared to AP regarding KSS (P = 0.048), KOOS (P = 0.000), and pain (P = 0.014) at the 11.5-year follow-up. Survivorship for AP tibial component implants was 97.6%, while it was 89.5% for MB ones.
While the survivorship rate has been found to be greater for AP implants compared to MB tibial components, this study reveals statistically better functional results according to KSS and KOOS, and pain, at a long-term follow-up for MB implants.
摘要：
虽然被认为是一个令人满意的解决方案，单室膝关节置换术（UKA）仍然引起人们对其耐久性的关注。这些关注特别集中在胫骨部件上。本研究旨在比较属于相同UKA设计的两种不同的骨水泥胫骨组件：所有聚乙烯（AP）与金属背衬（MB），在长期随访中。
我们回顾性分析了143例连续患者，其中83例接受了AP胫骨组件UKA手术（男性37例，46名女性），和67位MB（17位男性，50名女性）。所有植入物都具有相同的假体设计（AccurisUKA，SmitheNephew)具有相同的股骨奥辛组件但不同的胫骨组件，AP或MB。在平均11.5年的随访中评估KSS和KOOS，并与术前进行比较。术后,一年的评估。使用SPSSforMac（17.0版）进行统计分析。为了评估潜在的统计学显著差异，采用t检验,显著性设定为P<0.05。
在平均11.5年的随访中，AP组为94.27，MB组为96.12。AP组件的最终KOOS为87，MB组的最终KOOS为89.67。这些结果表明,在所有情况下,在KSS方面，与AP相比，MB胫骨组件的结果具有统计学意义（P=0.048），KOOS（P=0.000），和疼痛（P=0.014）在11.5年的随访。AP胫骨组件植入物的存活率为97.6％，而MB为89.5%。
虽然已发现与MB胫骨组件相比，AP植入物的存活率更高，根据KSS和KOOS，这项研究揭示了统计上更好的功能结果，和痛苦，在MB植入物的长期随访中。
我们回顾性分析了143例连续患者，其中83例接受了AP胫骨组件UKA手术（男性37例，46名女性），和67位MB（17位男性，50名女性）。所有植入物都具有相同的假体设计（AccurisUKA，SmitheNephew)具有相同的股骨奥辛组件但不同的胫骨组件，AP或MB。在平均11.5年的随访中评估KSS和KOOS，并与术前进行比较。术后,一年的评估。使用SPSSforMac（17.0版）进行统计分析。为了评估潜在的统计学显著差异，采用t检验,显著性设定为P<0.05。
在平均11.5年的随访中，AP组为94.27，MB组为96.12。AP组件的最终KOOS为87，MB组的最终KOOS为89.67。这些结果表明,在所有情况下,在KSS方面，与AP相比，MB胫骨组件的结果具有统计学意义（P=0.048），KOOS（P=0.000），和疼痛（P=0.014）在11.5年的随访。AP胫骨组件植入物的存活率为97.6％，而MB为89.5%。
虽然已发现与MB胫骨组件相比，AP植入物的存活率更高，根据KSS和KOOS，这项研究揭示了统计上更好的功能结果，和痛苦，在MB植入物的长期随访中。
