中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (31): 4665-4670.doi: 10.3969/j.issn.2095-4344.2016.31.015

• 骨与关节生物力学 bone and joint biomechanics • 上一篇    下一篇

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 

宁 旭,庄 勇,刘 淼,张 皓,黄明智   

  1. 贵州医科大学附属医院骨科,贵州省贵阳市 550001
  • 修回日期:2016-06-01 出版日期:2016-07-22 发布日期:2016-07-22
  • 通讯作者: 黄明智,贵州医科大学附属医院骨科,贵州省贵阳市 550001
  • 作者简介:宁旭,男,1973年生,汉族,贵州省贵阳市人,副主任医师,硕士生导师,主要从事脊柱外科疾病的临床及基础研究。
  • 基金资助:

    贵州省科技厅项目(黔科合LH字〔2014〕7111)

Biomechanical properties of lower anterior vertebral pedicle screw system and its effects on osteoporotic vertebral stability

Ning Xu, Zhuang Yong, Liu Miao, Zhang Hao, Huang Ming-zhi   

  1. Department of Orthopedics, Affiliated Hospital, Guizhou Medical University, Guiyang 550001, Guizhou Province, China
  • Revised:2016-06-01 Online:2016-07-22 Published:2016-07-22
  • Contact: Huang Ming-zhi, Department of Orthopedics, Affiliated Hospital, Guizhou Medical University, Guiyang 550001, Guizhou Province, China
  • About author:Ning Xu, Associate chief physician, Master’s supervisor, Department of Orthopedics, Affiliated Hospital, Guizhou Medical University, Guiyang 550001, Guizhou Province, China
  • Supported by:

    a grant from the Science and Technology Department of Guizhou Province, No. LH (2014) 7111

摘要:

文章快速阅读:


文题释义:
普通颈椎前路钉板系统:能对植骨产生明显的支撑作用,为植骨提供融合基础,产生相对稳定的固定系统,限制植骨块的脱落,重建机体颈椎结构的稳定性,减少植骨块的脱落。但该固定系统生物力学性能较差,固定后容易引起钢板螺钉的滑脱、断裂等,在一定程度上限制了椎弓根螺钉固定技术的使用。
下颈椎前路椎弓根螺钉系统:融合了前路和后路不同手术的优点,既能从前路处理椎体病变,如:切除肿瘤,还能有效的提高椎弓根固定系统的稳定性,降低了患者后路二次手术。同时,该系统还能有效的避免钢板或螺钉脱落等并发症发生率,进一步弥补骨质疏松症患者椎体钉把持力不足等缺点,提高临床疗效。
 
摘要
背景:老年性骨质疏松椎骨骨折传统手术治疗虽然能改善患者症状,但是治疗后容易产生植骨融合失败、假关节形成等并发症,影响临床疗效。
目的:探讨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。
方法:取16具新鲜尸体颈椎标本,分解为C3-4,C4-5,C5-6,C6-7,共64个运动节段。将64个节段按植入方式不同随机分为普通前路椎体螺钉锁定固定系统组和下颈椎前路椎弓根螺钉人工椎体系统组,每组32个节段,在生物力学试验机上对各组生物力学性能进行测定。
结果与结论:①生物力学检测:与普通前路椎体螺钉锁定固定系统组相比,下颈椎前路椎弓根螺钉人工椎体系统组最大拔出力、钉道长度、治疗后骨折椎体中柱高度、表面最大应变、应变最大值及最大值的范围均增加(P < 0.05);②结果提示:与普通前路椎体螺钉钢板系统相比,下颈椎前路椎弓根螺钉所需要的拔出力较大,对于骨质疏松椎骨更加稳定。

中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程

ORCID:
0000-0002-7363-3744(宁旭)

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

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 pull-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.

中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程

Key words: Tissue Engineering, Osteoporosis, Vertebra, Complications

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