椎間植入物位移量測系統研究

Study of Migration Gauging System of Interbody Devices

陳勁甫(Jing-Fu Cheng)

指導教授 ： 單秋成

國立臺灣大學/工學院/機械工程學研究所/碩士(2011年)

https://doi.org/10.6342/NTU.2011.00329

摘要

以往大多使用X光、斷層攝影並配合生物組織學來分析椎間融合手術後，椎間融合器與椎體的癒合及滑移情形，但這些影像分析的方式並不能準確得知其實際的位移。為解決此問題，本研究擬發展一套針對椎間植入物的位移量測系統，配合相關力學試驗，對椎體施予axial loading、flexion、extension、lateral bending等非破壞性週期性負荷，希望能量測週期性負荷前後植入物的位移情形。量測系統分為量測框架(座標系統)、量測裝置與LabView程式等三部分，而量測裝置是由臨床脊椎穿刺用針頭作為探針，配合千分測微尺頭、精密平移台及高度框架所組成，量測於座標系統內椎間植入物之位置，再匯入程式分析其位移情形。透過針對量測結果的量測再現性實驗得知，目前整體量測誤差大約在0.169 mm左右，且配合驗證比對可看出，量測結果與實際植入物位置大致呈現一致的情形。

關鍵字

椎間融合器 ； 位移量測系統 ； 週期性負荷 ； 量測精度 ； 驗證比對

並列摘要

Radiography, tomography and histology are mostly used to evaluate bone ingrowth and the cage migration in the intervertebral fusion. However, it is not accurate to measure the cage location and relative migration by radiographs. In this study, a mechanical migration gauging system of interbody cage is proposed to solve the accuracy problem. Specimens are nondestrctively subjected to flexion, extension, lateral bending and axial compression load and the cage location after cyclic loading are measured by this system. The gauging system includes three parts: the coordinate axis, the gauging devices and labview. The former is composed of spinal needle, micrometer head and precision actuator-loaded linear stage. At present, the experimental result reveals that the statistics measured by the system (the error is approximately 0.169 mm) are almost consistent with the actual situation.

並列關鍵字

interbody cage ； migration gauging system ； cyclic loading ； precision ； spinal needle

參考文獻

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