Krämer Manuel, Kahrs Lüder A, Friese Karl-Ingo, von Falck Christian, Hurschler Christof
Laboratory for Biomechanics and Biomaterials, Hannover Medical School, Hannover, Germany.
Institute of Mechatronic Systems, Leibniz Universität Hannover, Hannover, Germany.
Int J Med Robot. 2018 Apr;14(2). doi: 10.1002/rcs.1887. Epub 2018 Jan 15.
The implantation of the acetabular cup essentially determines the clinical outcome of total hip arthroplasty. To address this issue, the aim of this study was to build patient-specific instruments (PSIs) with various reference surfaces, followed by in vitro investigations to examine the inter- and intra-operator reliability as well as the overall precision of these patient-specific templates.
Seven human hemi-pelvis specimens were used for this study. After a CT scan, PSIs with different imprint heights were created. The overall precision of the templates and the inter- and intra-operator reliabilities were calculated.
Strong differences in precision between the PSI designs could be observed. The desired orientation of the acetabular cup could be adjusted with a precision of up to 1.55°.
Based on our results, we believe that the application of the PSI-based acetabular cup positioning in total hip arthroplasty procedures can potentially increase the precision of cup placement.
髋臼杯的植入在很大程度上决定了全髋关节置换术的临床效果。为解决这一问题，本研究的目的是构建具有不同参考面的患者特异性器械（PSI），随后进行体外研究，以检验这些患者特异性模板在术者之间和术者自身的可靠性以及整体精度。
本研究使用了七个半骨盆标本。在进行CT扫描后，制作了具有不同印记高度的PSI。计算了模板的整体精度以及术者之间和术者自身的可靠性。
可以观察到PSI设计之间在精度上存在显著差异。髋臼杯的期望方向调整精度可达1.55°。
基于我们的研究结果，我们认为在全髋关节置换手术中应用基于PSI的髋臼杯定位可能会提高髋臼杯放置的精度。
