Takemura Susumu, Ikawa Tessyu, Ohyama Yohei, Kim Mitsunari, Takaoka Kunio, Minoda Yukihide, Kadoya Yoshinori
Department of Orthopaedic Surgery, Osaka City University Graduate School of Medicine, 1-4-3, Asahimachi, Abeno-ku, Osaka, 545-8585, Japan.
Department of Orthopaedic Surgery, Saiseikai Nakatsu Hospital Osaka, 2-10-39, Shibata, Kita-ku, Osaka, 530-0012, Japan.
Arthroplasty. 2021 Aug 2;3(1):28. doi: 10.1186/s42836-021-00085-5.
It remains uncertain whether an increase in the tibial slope leads to better flexion in posterior-stabilized (PS) total knee prostheses.
To compare the intra-operative flexion angle between standard and an additional 10° posterior slope inserts.
Between December 2014 and February 2015, 22 patients (25 knees) who underwent PS mobile-bearing primary total knee arthroplasty (TKA) were included. Flexion angles were measured using either standard or specially-made inserts. Differences in flexion angles between the two situations were analyzed to determine the relationship between changes in flexion angle and pre-operative flexion angle or body mass index (BMI), and between intra- and post-operative flexion angle.
The difference between the average flexion angle of standard inserts and specially-made inserts was not statistically significant. Although the correlations between changes in flexion angle due to insert difference and flexion angle, pre-operative flexion angle or BMI were not significant, there was a positive correlation between intra-operative and post-operative flexion at 2 years.
The results showed an additional posterior tibial slope by 10° did not affect the intra-operative flexion angle. Surgeons performing PS mobile-bearing TKA do not need to excessively slope the tibial bone cutting to improve the post-operative flexion angle.
I, Experimental study.
在后方稳定型（PS）全膝关节假体中，胫骨坡度增加是否能带来更好的屈曲尚不确定。
比较标准后倾角度和额外增加10°后倾角度的垫片在手术中的屈曲角度。
纳入2014年12月至2015年2月期间接受PS活动平台初次全膝关节置换术（TKA）的22例患者（25膝）。使用标准垫片或特制垫片测量屈曲角度。分析两种情况下屈曲角度的差异，以确定屈曲角度变化与术前屈曲角度或体重指数（BMI）之间的关系，以及术中与术后2年屈曲角度之间的关系。
标准垫片和特制垫片的平均屈曲角度差异无统计学意义。虽然因垫片差异导致的屈曲角度变化与屈曲角度、术前屈曲角度或BMI之间的相关性不显著，但术中与术后2年的屈曲呈正相关。
结果表明，额外增加10°的胫骨后倾角度不影响术中屈曲角度。进行PS活动平台TKA的外科医生无需过度倾斜胫骨截骨以改善术后屈曲角度。
I，实验研究。
