中国组织工程研究2016，Vol.20Issue(31)：4665-4670,6.DOI:10.3969/j.issn.2095-4344.2016.31.015
下颈椎前路椎弓根螺钉人工椎体系统生物力学性能及对骨质疏松椎骨稳定性的影响
Biomechanical properties of lower anterior vertebral pedicle screw system and its effects on osteoporotic vertebral stability
摘要
Abstract
BACKGROUND:Although the traditional surgical treatment can improve the symptoms of patients with senile osteoporotic vertebral fracture, the treatment easily produces bone graft fusion failure and pseudoarticulation formation and affects clinical effects. OBJECTIVE:To investigate biomechanical properties of anterior cervical pedicle screw and the effects on osteoporotic vertebral stability. METHODS:A total of 16 fresh cadaver cervical specimens contained 64 motion segments (C3-4, C4-5, C5-6 and C6-7). The 64 segments by the way of implantation were randomly divided into ordinary anterior locking screw fixation group and lower anterior vertebral pedicle screw system group (32 segments per group). The mechanical properties were determined on the biomechanical testing machine for each group. RESULTS AND CONCLUSION:(1) Biomechanics:Compared with the ordinary anterior locking screw fixation group, the maximum pul-out strength, screw path length, postoperative vertebral column height, the maximum surface strain, strain maximum and the range of maximum values were increased in the lower anterior vertebral pedicle screw system group (P<0.05). (2) Results suggest that compared with the ordinary anterior locking screw fixation group, lower cervical anterior pedicle screw required larger extraction force and was more stable for osteoporotic vertebrae.关键词
人工假体/脊柱植入物/下颈椎前路椎弓根螺钉/人工椎体系统/生物力学/骨质疏松/稳定性/生物力学试验机/骨密度值/中柱高度/外观修复评分Key words
Tissue Engineering/Osteoporosis/Vertebra/Complications分类
医药卫生引用本文复制引用
宁旭,庄勇,刘淼,张皓,黄明智..下颈椎前路椎弓根螺钉人工椎体系统生物力学性能及对骨质疏松椎骨稳定性的影响[J].中国组织工程研究,2016,20(31):4665-4670,6.基金项目
贵州省科技厅项目(黔科合LH字〔2014〕7111)@@@@a grant from the Science and Technology Department of Guizhou Province, No. LH (2014)7111 （黔科合LH字〔2014〕7111）
