UNASSIGNED: A prospective cohort study comparing CAS-rTKA with a historical control group (CON-rTKA). The CAS-rTKA group (54 patients/62 knees) underwent rTKA using imageless CAS between 2012 and 2017. The CON-rTKA group (13 patients/23 knees) was operated using the conventional technique between 2002 and 2012. Postoperative alignment was measured using the EOS-2D/3D system (coronal and sagittal planes) and computed tomography scan (rotation).
UNASSIGNED: No significant differences between the CAS-rTKA and CON-rTKA groups were found for coronal and sagittal alignment regarding the mechanical angle of the leg (p = 0.08), mechanical lateral distal femoral angle (p = 0.87), mechanical medial proximal tibial angle (p = 0.40), anatomical proximal posterior tibial angle (p = 0.43) nor femoral (p = 0.80) and tibial rotation (p = 0.15). For the proportions of coronal, sagittal and rotational outliers, no significant differences were found either.
UNASSIGNED: This study showed no evidence that use of CAS during rTKA leads to improved coronal, sagittal or rotational alignment of knee prostheses or a difference of outliers between the groups.
UNASSIGNED: Level III, therapeutic.
■一项前瞻性队列研究,比较CAS-rTKA与历史对照组(CON-rTKA)。CAS-rTKA组(54名患者/62膝)在2012年至2017年期间使用无图像CAS进行rTKA。CON-rTKA组(13名患者/23膝)在2002年至2012年间使用常规技术进行手术。使用EOS-2D/3D系统(冠状和矢状平面)和计算机断层扫描(旋转)测量术后对准。
■CAS-rTKA和CON-rTKA组的冠状和矢状排列在腿的机械角度方面没有发现显着差异(p=0.08),机械外侧股骨远端角度(p=0.87),胫骨近端机械内侧角(p=0.40),解剖学近端胫骨后角(p=0.43)或股骨(p=0.80)和胫骨旋转(p=0.15)。对于日冕的比例,矢状和旋转异常值,也没有发现显著差异.
■这项研究没有证据表明在rTKA期间使用CAS会导致冠状,膝关节假体的矢状或旋转对齐或组间异常值的差异。
■三级,治疗。