不同設計類型之人工頸椎間盤之有限元素分析

Finite Element Analysis of Different Design Types of Artificial Cervical Disc

徐稚雯(Chih-Wen Hsu)

指導教授 ： 陳文斌

中原大學/工學院/醫學工程研究所/碩士(2007年)

https://doi.org/10.6840/cycu200700957

摘要

無資料

關鍵字

椎間盤退化 ； 有限元素分析 ； 人工頸椎間盤

並列摘要

Interbody fusion is often a major surgical treatment for intervertebral degeneration and instability. During the treatment, vertebrae are fused together using an interbody fusion device. Such fusion treatment intend　to protect spine and relieve nerve pains. However, this treatment may lack mobility of cervical spine, and increase the disc stresses at adjacent levels. Nonfusion is a relatively new surgical treatment procedure, and the major implant for the nonfusion surgery is artificial disc. Instead of spinal fusion has been used to protect the spine from the excessive changes in mechanical stress. The object of this study was to use a computational finite element method to generate the cervical spine model from the digitized CT scans, and to use using different motion design types of artificial disc. It was applied a preload of 73.6N and 1Nm moment in flexion, extension, lateral bending and axial rotation to investigate the range of motion (ROM), disc stresses at the adjacent level, the center of rotation (COR) of the vertebral body, and the effect on the range of motion after insertion of the artificial disc with and without annulus fibers. Besides, we divided three design types of the artificial disc in this study: TypeⅠ- ball-and-socket type device; TypeⅡ- large radius bearing surface device; TypeⅢ- bi-articulating unconstrained device. The range of motion was not significantly different for the intact and disc replacement groups with annulus fibers under flexion, extension, lateral bending and axial rotation. However, the range of motion of disc replacement groups without annulus fibers was significantly higher than that of the intact model. Besides, the range of motion gives a good account of the insertion of TypeⅡ group in axial rotation, and the range of motion with the insertion of TypeⅢ group was similar to that of the intact model. The center of rotation area of the intact model was found smaller than that of the artificial disc insertion model. Consequently, the intact model is the steadiest motion situation than the three model with artificial cervical disc groups.

並列關鍵字

Degenerative Disc Disease ； Artificial Disc ； Finite Element Analysis

參考文獻

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