摘要
背景:目前锁定接骨板结合钢丝或钢缆治疗股骨假体周围骨折时近端常采用单皮质固定,稳定性不强,且接骨板近端与股骨无法达到解剖贴合,而定制式解剖接骨板系统(customized anatomical plate system,CAPS)可有效解决这一问题。目的:探讨CAPS固定Vancouver BⅠ型股骨假体周围骨折的生物力学强度。方法:选取1006例股骨CT薄层扫描数据导入MIMICS 21.0版本软件中建立股骨三维重建模型,设为股骨三维重建组;选取56根完整的人体股骨标本设为股骨标本组,两组进行股骨解剖外形测量并进行结果比较,两组结果无明显差异则根据测量结果在MIMICS 21.0软件和NX11.0软件中设计CAPS大致外形;选取8对冰冻人体股骨制作Vancouver BⅠ型股骨假体周围骨折模型,双源CT薄层扫描左侧8根股骨假体周围骨折模型获取数据,将数据传入上述设计软件确定CAPS模型,再依托器械公司最终制作8套CAPS;8对骨折模型编号1-8,左侧采用CAPS固定(CAPS组),右侧采用金属锁定接骨板系统-大型锁定板固定(爪钢板组),L1-L4、R1-R4行垂直加载测试和垂直短周期加载测试,L5-L8、R5-R8行四点弯曲测试和水平短周期加载测试。垂直加载测试和四点弯曲测试收集弯曲载荷、弯曲位移、弯曲应变,采用2种短周期测试收集应变位移,比较2种接骨板的最大载荷、最大位移、抗弯刚度及短周期抗移位能力。结果与结论:①股骨三维重建组与股骨标本组各长度及角度指标比较,差异均无显著性意义(P>0.05),可依据测量结果结合软件设计个体化CAPS;②垂直加载测试中,CAPS组比爪钢板组可承受的最大载荷高(P=0.015)、出现最大弯曲位移小(P=0.014)、抗弯刚度高(P=0.005);③四点弯曲测试中,CAPS组比爪钢板组可承受的最大载荷高(P=0.023)、抗弯刚度高(P=0.005),弯曲位移差异不显著(P=0.216>0.05);④垂直短周期加载测试中CAPS组平均弯曲位移(0.23±0.10)mm显著小于爪钢�
BACKGROUND:At present,the use of a locking bone plate combined with steel wire or steel cable for the treatment of periprosthetic femoral fracture often adopts monocortical fixation,which is not stable and the proximal end of the bone cannot be achieved anatomically fitted by plate.The customized anatomical plate system can effectively solve this problem.OBJECTIVE:To explore the biomechanical strength of a customized anatomical plate system in fixation of Vancouver BI periprosthetic femoral fracture.METHODS:CT thin layer scanning data of normal femurs of 1006 cases were selected and input into the MIMICS 21.0 software to establish the threedimensional reconstruction model of the femur,which was set as the three-dimensional reconstruction group.56 complete human femoral specimens were selected as the femoral specimen group.The measured results of the two groups for femoral anatomical appearance were compared.If there was no significant difference between the two groups,the approximate appearance of a customized anatomical plate system was designed based on the measurement results in MIMICS 21.0 software and NX11.0 software.The customized anatomical plate system was designed and prepared according to the above measurement results.Eight pairs of frozen human femurs were selected to make Vancouver BI periprosthetic femoral fracture,which of the left were thin layer scanned by dual-source CT to obtain data.The data were transferred to determine the customized anatomical plate system model by the above design software.Eight sets of customized anatomical plate systems were ultimately produced,relying on the instrument company.The eight pairs of models were numbered 1-8.The left side was fixed with the customized anatomical plate system(customized anatomical plate system group);the right side was fixed with a metal locking plate system-large locking plate(claw plate group).L1-L4 and R1-R4 were subjected to vertical short-cycle loading test and vertical loading test.L5-L8 and R5-R8 were subjected to horizontal short-cycle
作者
王佳琦
罗晓中
童祎
鲁晓波
石维祥
周欣
吴刚
丁勇
张才东
Wang Jiaqi;Luo Xiaozhong;Tong Yi;Lu Xiaobo;Shi Weixiang;Zhou Xin;Wu Gang;Ding Yong;Zhang Caidong(Orthopedic Center,Joint and Trauma Surgery,Zigong Fourth People’s Hospital,Zigong 643000,Sichuan Province,China;Department of Bone and Joint Surgery,Affiliated Hospital of Southwest Medical University,Luzhou 646000,Sichuan Province,China)
出处
《中国组织工程研究》
CAS
北大核心
2024年第24期3807-3813,共7页
Chinese Journal of Tissue Engineering Research
基金
四川省医学会骨科(尚安通)专项科研课题(2021SAT07),项目负责人:童祎。
