中国组织工程研究

中国组织工程研究 ›› 2010, Vol. 14 ›› Issue (43): 8016-8018.doi: 10.3969/j.issn.1673-8225.2010.43.010

• 数字化骨科 digital orthopedics • 上一篇    下一篇

数字散斑法测量加载100 N与400 N股骨干骨折钢板固定下的位移

巴迎春1，陈英杰1，范  艳1，王金德1，周轶平2   

  1. 1昆明医学院人体解剖学教研室，云南省昆明市 650031；2昆明医学院药学院暨重点实验室，云南省昆明市  650031
  • 出版日期:2010-10-22 发布日期:2010-10-22
  • 通讯作者: 周轶平，博士，讲师，昆明医学院药学院暨重点实验室，云南省昆明市 650031 yipingzhou.cn@gmail.com
  • 作者简介:巴迎春，男，1971年生，云南省文山县人，汉族，1994年昆明医学院毕业，副教授，主要从事生物医学方面的研究。 byc71206@yahoo.com.cn 并列第一作者：陈英杰，男，1967年生，云南省个旧市人，汉族，1989年昆明医学院毕业，教授，主要从事生物医学方面的研究。 chenyj2002@gmail.com

Displacement of steel plate of femoral fractures under 100 and 400 N loading: Measurement by using digital speckle method

Ba Ying-chun1, Chen Ying-jie1, Fan Yan1, Wang Jin-de1, Zhou Yi-ping2　   

  1. 1 Department of Anatomy, Kunming Medical College, Kunming  650031, Yunnan Province, China; 2 Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical College, Kunming  650031, Yunnan Province, China
  • Online:2010-10-22 Published:2010-10-22
  • Contact: Zhou Yi-ping, Doctor, Lecturer, Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical College, Kunming 650031, Yunnan Province, China yipingzhou.cn@gmail.com
  • About author:Ba Ying-chun, Associate professor, Department of Anatomy, Kunming Medical College, Kunming 650031, Yunnan Province, China byc71206@yahoo.com.cn Ba Ying-chun and Chen Ying-jie equally contributed to this article.

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307

被引次数

2

摘要：

背景：钢板内固定是治疗长骨骨折常用的固定物之一，易发生螺钉断裂致骨畸形。将光学测量技术应用到生物医学领域中，能更精确的分析螺钉断裂的特点。
目的：以数字散斑法测量股骨钢板螺钉的位移。
方法：取6根股骨，于股骨干中点横行锯断，制造股骨中段骨折模型。将骨折标本进行复位，用10孔钢板固定，骨折线两端各使用5枚螺钉固定。将实验模型设计成骨折前后2种状态，进行对比测量锁钉位移。分别在100，400 N拉力下，通过相关软件计算位移。
结果与结论：在100 N及400 N状态下，螺钉1~10所承受的应力均存在显著差异(F =108.326，P < 0.01；F =151.258，P < 0.01)。进一步行两两比较，成对称分布的螺钉所承受的应力差异无显著性意义(P > 0.05)，其余两两比较所承受的应力差异均有显著性意义(P < 0.05)。提示骨折线两端的2枚螺钉是承受较多应力的部位，易发生断裂，所有螺钉的固定应尽量在一条直线上，使负荷平衡。

关键词: 股骨干, 骨折, 钢板, 螺钉, 内固定, 生物力学

Abstract:

BACKGROUND: Plate internal fixation is frequently used to treat long-bone fracture. However, screw breakage-induced bone deformity occurs. Optical measurement can accurately analyze features of screw breakage.
OBJECTIVE: To measure the displacement of femoral steel plate screw by the digital speckle method.
METHODS: A total of 6 femoral specimens were used, and femoral middle segment fracture was made by sawing at 1/2 of shaft of femur. The fracture sample was reduced, and fixed using 10-well plate with 5 screws at each end. Two conditions (before and after the fracture) were designed to compare the displacement of the screws. The displacement was calculated under 100 and 400 N tensile force.
RESULTS AND CONCLUSION: There was significant difference in stress among screw 1-10 under 100 and 400 N tensile force (F=108.326, P < 0.01; F=151.258, P < 0.01). Pair-comparison showed no significance between screw 1 and 10, 2 and 9, 3 and 8, 4 and 7, 5 and 6 (P > 0.05), and the stress among any other two screws were significant (P < 0.05). The screws at two ends of fracture line bear more stress, and could break. All screws fixed should cause the load equalization as far as possible in a straight line.

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