基于模型的X线立体摄影测量分析评估大多角骨-第一掌骨关节假体早期移位的可行性
Feasibility of model-based Roentgen Stereophotogrammetric Analysis to evaluate early migration of the trapeziometacarpal joint prosthesis.
作者信息
Ooms E M, ten Brinke B, Mathijssen N M C, Blom I F, Deijkers R L M, Kraan G A
机构信息
Centre for Orthopaedic Surgery, OCON, Hand and Wrist unit, Hengelo, The Netherlands.
Department of Orthopaedic Surgery, Reinier de Graaf Groep, Delft, The Netherlands.
出版信息
BMC Musculoskelet Disord. 2015 Oct 14;16:295. doi: 10.1186/s12891-015-0747-3.
BACKGROUND
The purpose of this study was to determine the feasibility of Roentgen Stereophotogrammetric Analysis (RSA) in total joint arthroplasty of the trapeziometacarpal (TMC) joint of the thumb.
METHODS
In five cadaveric hands the TMC-joint was replaced by the Surface Replacement Trapeziometacarpal prosthesis (SR™ TMC prosthesis; Avanta, San Diego, CA) and tantalum beads of 0.8 mm were implanted for RSA. RSA radiographs in two directions were made in ten positions to calculate the measurement error. Migration values from zero are indicative for the measurement error. The number of detected markers was recorded.
RESULTS
The accuracy analysis showed that for the translations the mean measurement error varied between 0.003 mm (SD 0.057) and 0.055 mm (SD 0.133). For the rotations values ranged from 0.034° (SD 1.759) to 0.502° (SD 1.617).
CONCLUSIONS
RSA analysis of the SR™ TMC prosthesis is feasible. The measurement error is good for the translations but high for the rotations. The latter is due to the close position of the markers relative to each other. Level of evidence III.
背景
本研究的目的是确定X线立体摄影测量分析（RSA）在拇指腕掌（TMC）关节全关节置换术中的可行性。
方法
在五具尸体手上，用表面置换型腕掌关节假体（SR™ TMC假体；Avanta，圣地亚哥，加利福尼亚州）置换TMC关节，并植入0.8毫米的钽珠用于RSA。在十个位置拍摄两个方向的RSA X线片以计算测量误差。从零开始的移位值表示测量误差。记录检测到的标记物数量。
结果
准确性分析表明，对于平移，平均测量误差在0.003毫米（标准差0.057）至0.055毫米（标准差0.133）之间变化。对于旋转，值范围为0.034°（标准差1.759）至0.502°（标准差1.617）。
结论
SR™ TMC假体的RSA分析是可行的。测量误差对于平移来说较小，但对于旋转来说较大。后者是由于标记物彼此之间位置较近所致。证据等级III。
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