頁籤選單縮合
題名 | 頭圈固定器釘骨界面之生物力學分析=Biomechanics of the Pin-Bone Interface of Halo Fixation Device |
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作者 | 周伯禧; 周有禮; 林正平; 羅世忠; | 書刊名 | 力學 |
卷期 | 16:2 2000.12[民89.12] |
頁次 | 頁101-107 |
分類號 | 410.025 |
關鍵詞 | 生物力學; 頭圈固定器; 扭力; Biomechanics; Halo fixation device; Torque; |
語文 | 中文(Chinese) |
中文摘要 | 本實驗以頭顱骨為材料而以拉伸實驗機施加壓力,旨在探討頭圈固定器頭釘顱骨 界面在不同的扭力、夾角與力臂時靜態機械性質的變化情形,並比較釘骨界面承受循環載重 後機械性質與靜態組的差別。結果發現釘骨界面的極限強度在頭圈距離顱骨的力臂短時較高 ,且隨著所用扭力的增加而增加,當頭釘與頭骨表面的夾角成垂直時最強,隨著夾角越趨銳 角而漸減,釘骨界面的剛性與扭力並無明顯關係但與夾角有關,夾角垂直時剛性最高,而後 隨著夾角漸趨銳角而遞減。而釘骨界面破壞前所吸收的能量與扭力及夾角都有密切關係,扭 力增大或夾角越接近垂直時破壞前所吸收的能量隨之增大。釘骨界面承受循環載重後頭釘鬆 脫程度和扭力大小無關,但力臂短時頭釘鬆脫程度則較力臂長時為低。循環載重前後釘骨界 面的剛性並無改變,但釘骨界面的極限強度與破壞前所吸收的能量皆有明顯降低,若在頭釘 鬆脫後重新將頭釘上緊至原來的扭力,則釘骨界面的極限強度與破壞前吸收的能量皆較未將 頭釘重新上緊者為高。 |
英文摘要 | The purpose of the study which combined the material of frontal bone and Instron loading machine, was to evaluate the mechanical properties of the pin-bone interface of the halo fixation device under different torque, pin-bone angle and moment arm for cyclic loading and static loading method. According to the results of this study, the ultimate strength of pin-bone interface increased as the moment arm decreased and torque increased. When the pin-bone angle approached 90 °, the ultimate strength was the largest and as the angle decreased, the ultimate strength decreased. There was no significant difference between rigidity and torque, but rigidity decreased as the skull-bone angle decreased. The absorbed energy before skull-bone fractured was significant relation with torque and angle. The absorbed energy increased as pin-bone angle increased and torque increased. There was no significant difference between torque and loosening level after cyclic loading. But the loosening level was small in short moment arm than in large moment arm. The rigidity had no significant change between before and after cyclic loading. The absorbed energy and ultimate strength decreased after cyclic loading. The ultimate strength and the absorbed energy before fracture with tightly relocking at pin-bone interface are larger than those without tightly relocking at pin-bone interface. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。