Materials and design concepts for an intervertebral disc spacer. II. Multidurometer composite design

摘要: The main function of the intervertebral disc is to transmit and attenuate compressive torsional forces, stabilize joint. Unfortunately, may be displaced or damaged due trauma disease causing nucleus herniate protrude into vertebral canal foramen. Pressure on spinal nerve cause pain paralysis in area its distribution. At present, surgical procedures used alleviate this condition include excision, and/or fusion. A more desirable situation would involve removing pulposus part all annulus fibrosis implanting a suitable biofunctional equivalent. Such prostheis should stresses prevent abnormal stress at adjacent joints. Maintenance normal height impingement posterior facet joints joint syndrome. In previous companion paper (J. Applied Biomat. 5:125–132; 1994), mechanical behavior prostheses manufactured from fiber reinforced, elastomeric thermoset resins were examined. order develop devices which practical manufacturing standpoint extremely reproducible, reinforced replaced by multi-durometer thermoplastic materials. present paper, properties multicomponent desings have been investigated. © 1995 John Wiley & Sons, Inc.