中国临床解剖学杂志 ›› 2018, Vol. 36 ›› Issue (1): 77-81.doi: 10.13418/j.issn.1001-165x.2018.01.017

• 临床生物力学 • 上一篇    下一篇

水平带状钢板治疗胫骨平台后外侧象限骨折的生物力学研究

胡孙君, 张世民, 李双, 杜守超, 马卓, 熊文峰, 张英琪   

  1. 同济大学附属杨浦医院骨科,  上海   200090
  • 收稿日期:2017-10-16 出版日期:2018-01-25 发布日期:2018-03-06
  • 通讯作者: 张世民,主任医师,教授,博士生导师,Tel:(021)65690520,E-mail:shiminchang11@aliyun.com
  • 作者简介:胡孙君(1981-),男,浙江宁波人,医学博士,副主任医师,研究方向为创伤骨科和足踝外科,Tel:13918581748,E-mail:husunjun@qq.com

Horizontal belt plate fixation for treating the isolated posterolateral tibial plateau fracture:a biomechanical study

HU Sun-jun,ZHANG Shi-min,LI Shuang,DU Shou-chao, MA Zhuo,XIONG Wen-feng, ZHANG Ying-qi   

  1. Department of Orthopaedics,Yangpu Hospital of Tongji University,Shanghai 200065, China
  • Received:2017-10-16 Online:2018-01-25 Published:2018-03-06

摘要:

目的 比较胫骨平台后外侧象限骨折不同内固定方式的力学稳定性效果。   方法 采用Synbone人工合成胫骨18个,切割构建孤立的胫骨平台后外侧象限骨折模型,随机分为3组,分别采用外侧水平带状钢板固定、外侧低切迹解剖锁定钢板固定、后侧直形重建钢板固定。将固定好的骨折模型置于万能水压材料测试机进行测试,分别进行静态加载、疲劳测试和极限加载,检测骨块的相对空间位移。   结果 以10 mm/min加载至总载荷1050 N,重复加载10000次后,带状钢板组骨折块的纵向位移(2.77±1.79) mm,外侧锁定钢板组的纵向位移为(2.69±1.14) mm;后方重建钢板组骨折块的纵向位移为(1.62±0.60) mm,组间差异无统计学意义(P>0.05)。施加载荷到骨或内固定的结构破坏后,带状钢板组的极限支撑力为(2055±263) N,外侧锁定钢板组的为(1968±209)N,后方重建钢板组的极限支撑力为(2272±130) N,组间差异具有显著的统计学意义(P<0.05)。  结论 治疗孤立的胫骨平台后外侧象限骨折,侧方带状钢板水平固定能取得满意的效果。

关键词: 胫骨平台,  后外侧平台,  平台骨折,  钢板内固定,  疗效,  生物力学

Abstract:

Objective To compare and analyze the biomechanical stability of 3 different fixations for the posterolateral tibial plateau fracture. Methods The posterolateral shearing fracture models were created in 18 synthetic tibia(Synbone) and randomly assigned into 3 groups.The fractures were fixed by horizontal belt plate (Group A), lateral low-profile anatomical LCP (Group B) and posterior reconstructive plate(Group C). Vertical displacements of the posterolateral fragments and failure loads were measured under axial loads including static loading test (from 300 N to 1050 N), fatigue loading test and damage loading teat. Results  The vertical displacements in groups A,B,and C were respectively (2.77±1.79)mm, (2.69±1.14)mm, and (1.62±0.60)mm under fatigue loading test, the total load 1050N with 10 mm/min and repeat load 10000 times.There was no significant difference between the groups (P>0.05). After the damage loading test, the final force in groups A,B,and C were respectively (2055±263) N, (1968±209) N and (2272±130) N, and there was significant difference among the groups (P<0.05). Conclusion Horizontal belt plate fixation for isolated posterolateral tibial plateau fracture can bring sufficient stability for the posterolateral fragment.

Key words: Tibial plateau; Posterolateral plateau fracture; Plate internal fixation; Outcome; , Biomechanics