EXPERIMENTAL AND CLINICAL RESEARCH OF TRACTION TREATMENT FOR CERVICAL SPONDYLOSIS -- A BIOMECHANICAL ANALYSIS OF TRACTION ANGLES
Tan Bee Gawh, Orthopedics and Traumatology Specialized Graduate Student for Master's Degree, Grade 1992, Fujian University of Traditional Chinese Medicine.
Tutors: Professor Zhang Anzhen, Wang Heming
ABSTRACT
Based on the characteristics of physiological anatomy of human cervical vertebrae and biomechanical analysis, an elastic bar with free upper end and fixed other end, the model of cervical vertebrae, was established. By photoelastic tests, calculations of two-dimension finite element, and calculations of SAP two-dimension and three-dimension finite element as well as the clinical application of 100 cases of cervical spondylosis from Singapore, we concluded that :-
- Along with the increase in traction angle of cervical vertebrae in the forward flexion position, tension stress in posterior parts of the inter vertebral discs and vertebrae increased downwards gradually. Above four experiments and calculations had the common law.
- 2 -D and 3 -D finite element calculations showed the important mechanics function of facet joint in traction. Along with the increase in traction angle of cervical vertebrae in the forward flexion position, the tension stress in facet joints increased.
- The analysis of 3 -D finite element revealed that the cervical vertebra traction in the forward flexion position led to the compression on anterior parts of the intervertebral discs and the tension on posterior parts of them and showed the corresponding translations (the tension deformation in the posterior parts and the compression deformation in the anterior parts ) .
- Compared with the other general tractions in the treatment of cervical spondylosis, the traction with degree of 25-30 had obvious advantages. ( P less than 0.05).
Conclusions:
- The result of cervical spine tractions has relevance to traction angle. Clinically, a 25-30 degree of traction angle in the forward flexion position is recommended in the treatnent of cervical spondylosis.
- This study explained the clinical appearances from biomechanics point of view and provided the theoretical basis for the treatment of cervical spondylosis by traction and had clinical significance.