Navigation in total-knee arthroplasty: CT-based implantation compared with the conventional technique.

Lars Perlick, Holger Bäthis, Markus Tingart, Carsten Perlick, Joachim Grifka
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引用次数: 99

Abstract

Background Exact axial limb alignment in total-knee arthroplasty (TKA) is important for a successful outcome. We evaluated the efficiency of computer-assisted implantation in TKA and compared it with the classical surgeon-controlled technique. Patients and methods We implanted 100 TKA using either the computer-assisted technique (50) or the conventional approach (50). There were no significant differences between the groups regarding the preoperative leg deformity. Accuracy of implantation was determined in postoperative long-leg coronal and lateral radiographs. Results A postoperative leg axis between 3 degrees varus and 3 degrees valgus was achieved in 46 patients in the group with computer-assisted implantation and 36 patients in the control group (p=0.01). A significant difference was also seen for the femoral component alignment in frontal plane. No complications influencing the clinical outcome were observed. Interpretation A CT-based navigation system improves the accuracy of TKA, but higher costs and time-consuming planning will mean that its usage is limited to special cases. Additional tools such as ligament balancing, which are presently only available with the CT-free software module, require to be added to the CT-based system.

全膝关节置换术中的导航:基于ct植入与传统技术的比较。
背景:在全膝关节置换术(TKA)中,准确的轴向肢体对齐对于成功的结果非常重要。我们评估了计算机辅助植入TKA的效率,并将其与经典的外科控制技术进行了比较。患者和方法我们使用计算机辅助技术(50例)或传统方法(50例)植入100个TKA。两组患者术前腿部畸形无显著差异。通过术后长腿冠状位和侧位片确定植入的准确性。结果计算机辅助植入术组46例患者术后腿轴在3°内翻- 3°外翻之间,对照组36例,差异有统计学意义(p=0.01)。股骨组成部分在额平面上的对齐也有显著差异。未见影响临床结果的并发症。基于ct的导航系统提高了TKA的准确性,但较高的成本和耗时的规划将意味着它的使用仅限于特殊情况。其他工具,如韧带平衡,目前只能在无ct软件模块中使用,需要添加到基于ct的系统中。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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