山东医药2018，Vol.58Issue(16)：1-4,4.DOI:10.3969/j.issn.1002-266X.2018.16.001
上胸椎前路椎弓根螺钉、后路椎弓根螺钉及前路普通椎体螺钉的抗拔出强度比较
Comparison of the pullout strength between anterior transpedicular screw,posterior pedicle screw and anterior vertebral body screw at upper thoracic spine
摘要
Abstract
Objective To compare the pullout strength between anterior transpedicular screw, posterior pedicle screw,and anterior vertebral body screw at upper thoracic spine.Methods Six embalmed cadavers,containing the entire structure from C7to T5,were selected,and then were divided into three groups:the group of anterior transpedicular screw (ATPS group),the group of posterior transpedicular screw(PTPS group),and the group of anterior vertebral body screw (AVBS group).Randomization process was carried out on the specimens of each vertebra from T 1to T4before experiment. The both sides of pedicle of each vertebra was randomly assigned as two different numbers.According to the random re-sults,we inserted either ATPS or PTPS in the pedicle,and inserted a AVBS in the front of the same vertebral body.The screw axial pullout test was carried out on mechanics testing machine,and we recorded each screw length and peak pullout force,then made statistical analysis for the data.Results The length of screw path of the ATPS group increased from T 1to T4,and T1was shorter than T2to T4in the PTPS group, and T4was longer than T1to T3in the AVBS group(all P<0.05).The maximum pullout strength of T 3and T4were greater than that of T1and T2in both group of ATPS and PTPS (both P<0.05),but the maximum pullout strength of the AVBS group did not change significantly(P>0.05).Under the same condition for T1to T4,the length of screw path and the maximum pullout strength were greater in the ATPS group than in the PTPS,by the same token,PTPS was greater than AVBS(all P<0.05).The length of screw path was positive-ly correlated with its maximum pullout strength(r=0.997, P=0.000).Conclusion The length of screw path and the maximum pullout strength of ATPS were greater than those of PTPS and AVBS,which would help to improve the stability of the internal fixation system.关键词
椎弓根螺钉固定术/上胸椎/前路椎弓根螺钉/后路椎弓根螺钉/普通椎体螺钉/抗拔出强度Key words
pedicle screw fixation/upper thoracic spine/anterior pedicle screw/posterior pedicle screw/vertebral body screw/pullout strength分类
医药卫生引用本文复制引用
杨立井,肖增明,梁栋柱,肖善文,贺聚良..上胸椎前路椎弓根螺钉、后路椎弓根螺钉及前路普通椎体螺钉的抗拔出强度比较[J].山东医药,2018,58(16):1-4,4.基金项目
国家自然科学基金资助项目(81460349). （81460349）
