Document Type
Thesis
Date of Award
5-31-1988
Degree Name
Master of Science in Engineering Science- (M.S.)
Department
Biomedical Engineering Committee
First Advisor
J. Russell Parsons
Second Advisor
Clarence W. Mayott
Third Advisor
David S. Kristol
Abstract
The purpose of this research was to develop an intervertebral disc prosthesis which can provide the biomechanical properties of the natural disc. The prosthesis will be used to replace the symptomatic degenerated disc and thereby limit backpain and subsequent spinal disease.
Four cadaveric L4-5 motion segments were mechanically tested under axial compression and combined compression/torsion, generating compressive moduli and torsional stiffness values. Following, prosthetic discs were fabricated and mechanically tested, with the fabrication technique directed towards the optimization of mechanical properties in compression, torsion and bending.
Thirty silicon rubber and forty five polyurethane disc prostheses were fabricated. Silicon rubber, dacron fiber reinforced discs were used in a pilot study to develop polymer curing techniques and observe mechanical property changes with design modifications. Fourteen homogeneous and 31 dacron fiber reinforced polyurethane disc prostheses were fabricated and mechanically tested in an effort to optimize design parameters.
A theoretical left/right lateral bending model was developed resulting in a theoretical lateral bending strain. This was compared to values in the literature for the natural discs.
Results indicated that a dacron fiber reinforced polyurethane disc prosthesis of appropriate design, mechanically simulated the natural L4-5 lumbar region spinal disc.
Recommended Citation
Siryi, Bohdan A., "The design, manufacture and mechanical analysis of an L4-5 spinal disc prosthesis" (1988). Theses. 3217.
https://digitalcommons.njit.edu/theses/3217
