Chinese Journal Of Clinical Anatomy ›› 2018, Vol. 36 ›› Issue (6): 674-677.doi: 10.13418/j.issn.1001-165x.2018.06.015

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Impact of fixiation spondylolysis using the aerofoil–shaped Ni-Ti alloy on the intervertebral disc

WANG Jian1, ZHU Li-xin2,YANG Hui1,GU Qin-wen1,PENG Dao-hu1,LI Sen1   

  1. 1. Department of Orthopedic,Hospital(T.C.M) Affiliated to Southwest Medical University, Luzhou 646000,China;2. Department of Orthopedic,Zhujiang Hospital,Southern Medical University,Guangzhou 510282,China
  • Received:2018-05-08 Online:2018-11-25 Published:2018-12-29

Abstract:

Objective Application of Ni-Ti alloy fixation (AEROFOIL FIXATION) in spondylolysis has been successful. The aim of this study was to analyze its impact on the intervertebral disc using the finite element model. Methods A three-dimensional non-linear finite element(FE) model of spondylolysis has been developed. Von Mises stresses and distributions of intervertebral disc were analyzed in flexion, extension, left lateral bending and left axial rotation. Results Under different conditions, the maximum stresses of affected disc were increased to 105%、102%、101% and 111%,respectively. After direct repair by AEROFOIL FIXATION technique, the affected disc stresses decreased to 67%, 55%, 88% and 83%, respectively. Conclusions  AEROFOIL FIXATION, due to  its reasonable structure and excellent biomechanical properties that can prevent the anterior degeneration intervertebral disc and, should be promoted in clinical application, providing another choice for the treatment of lumbar spondylolysis.

Key words: Ni-Ti alloy; Spondylolysis,  Intervertebral disc; Finite element