[Finite element analysis of a new shape memory alloy cervical hook for atlantoaxial instability].
The mechanics of a new shape memory alloy cervical hook for atlantoaxial instability was analyzed with finite element method on the basis of a three-dimensional model reconstructed from the images of CT scanning of an adult cadaveric upper cervical at 1-mm interval. The stress and displacement of every nodule and element in the course of deformation of the internal fixation were tested, and the results showed that the cervical hook was strong enough against tensile stress, which concentrates in the middle of the device. The pull was 237.58 N at the loading point. With such mechanical performance, this cervical hook can be reliable for correction of atlantoaxial instability.
Shu
Xiao-qiu
XQ
Department of Orthopedics, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China. autumn95@163.com
Wan
Lei
L
Yu
Chun-tang
CT
Yin
Tong
T
Jin
An-min
AM
D000328:Adult; D000497:Alloys; D001268:Atlanto-Axial Joint; D002102:Cadaver; D020342:Finite Element Analysis; D006801:Humans; D007593:Joint Instability / Q000000981:diagnostic imaging / Q000601:surgery*; D008297:Male; D008568:Memory; D009984:Orthopedic Fixation Devices / Q000592:standards*; D019637:Orthopedic Procedures / Q000295:instrumentation / Q000379:methods; D011859:Radiography; D015203:Reproducibility of Results; D013718:Tensile Strength
D000497:Alloys