EXPERIMENTAL AND CLINICAL RESEARCH OF
TRACTION TREATMENT FOR CERVICAL SPONDYLOSIS -- A BIOMECHANICAL ANALYSIS OF
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
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).
- 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.