背景:术后对准是全踝关节置换术(TAA)成功的最关键指标。踝关节旋转不良与聚乙烯磨损和内侧沟疼痛的风险增加有关。目前,对于测量胫骨和距骨组件在轴向平面中的旋转对齐的正确方法没有共识。在目前的研究中,术后分析系统采用负重计算机断层扫描和三维(3D)模型进行评估.该研究的目的是评估该系统的观察者之间和观察者之间的协议。
方法:由两个评估者在两个单独的读数中独立地测量了四个角度:胫骨后部组件旋转角度(PTIRA),距骨后部旋转角度(PTARA),胫骨距骨部件轴向角(TTAM),和胫骨组件到第二跖骨角(TMRA)。协议分析根据类间系数进行量化。
结果:对60名患者的60名TAA进行了评估。在测量PTIRA时,良好的观察者间协议和观察者内协议,PTARA,在测量TMRA角度时,观察到TTAM角度以及出色的观察者间一致性和观察者内一致性。
结论:结论:当前基于3D模型的测量系统表现出良好的内部和内部一致性。根据这些结果,3D建模可以可靠地用于测量和评估TAA部件的轴向旋转。
方法:3级回顾性研究。
BACKGROUND: Post-operative alignment is the most critical indicator for a successful total ankle arthroplasty (TAA). Total ankle malrotation is associated with an increased risk for polyethylene wear and medial gutter pain. Currently, there is no consensus on the correct way to measure the alignment of the tibial and talar component rotations in the axial plane. In the current study, the post-operative analysis system was assessed using weight-bearing computer tomography and a three-dimensional (3D) model. The purpose of the study was to assess the inter-observer and intra-observer agreement of this system.
METHODS: Four angles were measured by two raters independently in two separate readings: posterior tibial component rotation angle (PTIRA), posterior talar component rotation angle (PTARA), tibia talar component axial angle (TTAM), and tibial component to the second metatarsal angle (TMRA). Agreement analysis was quantified according to the interclass coefficient.
RESULTS: Sixty TAAs across 60 patients were evaluated. A good inter-observer agreement and intra-observer agreement when measuring the PTIRA, PTARA, and TTAM angles was observed along with an excellent inter-observer agreement and intra-observer agreement when measuring the TMRA angle.
CONCLUSIONS: In conclusion, the current 3D model-based measurement system demonstrates good to excellent inter and intra-agreement. According to these results, 3D modelling can be reliably used to measure and assess the axial rotation of TAA components.
METHODS: Level 3 retrospective study.