EXPERIMENTAL STUDY OF STABILITY AT CEMENT AND CEMENTLESS IMPLANTATION OF TRANSPEDICULAR SCREWS INTO VERTEBRAE WITH LOW MINERAL DENSITY OF BONE

Abstract

The stability of cemented and noncemented transpedicular screw implantations in vertebra with low mineral bone density was studied in experiment. We analyzed the destabilization of screw under distraction load, attached along longitudal axis of the screw on universal servo-hydraulic test machine «Walter+bay ag» LFV-10-T50. The factors of bone-cement-metallic block rigidity of cemented screw was in 2,10-2,38 times more then in situation with traditional transpedicular screw.

Keywords

• transpedicular screw fixation
• osteoporosis
• experiment
• bone cement
• stability