中国组织工程研究与临床康复2011，Vol.15Issue(43)：7991-7993,3.DOI:10.3969/j.issn.1673-8225.2011.43.003
数字散斑法测量加载100N与400N肱骨干骨折钢板固定下的位移
Measuring the displacement of the steel plate for humeral fractures under 100 N and 400 N by the digital speckle method
摘要
Abstract
BACKGROUND: The digital speckle method used In biomedicine is more accurate to analyze the characteristics of screwbreakage.OBJECTIVE: To measure the displacement of Bie humeral steel screw by the digital speckle method.METHEDS: A total of 4 root humeri were used, and humeral middle segment fracture was made by sawing at 1/2of thehumems.The fracture sample was reduced, and fixed using 8-well plate witfi 4 screws at each end. Five conditions (before and after thefracture) were designed to compare the displacement of the screws. The displacement was calculated under 100 and 400 Ntensile force. Condition A was a strengthened plate fixation (no sawed, no fracture)! Oondition o was to remove a screw at theproximal end after fracture; Condition C was to remove a screw at the distal based on B. Condition D is to remove a screw at theproximal based on C; Condition E was to remove a screw at the distal based on D. Two MEDAL screws displacement at bothends were calculated by using relevant softwares.RESULTS AND CONCLUSION: Under 100 N and 400 N tension, there were significant different displacement of the two screwssymmetrically distributed at both fracture lines as other screws decreased (P< 0.01). Stress difference of the two screwssymmetrically distributed beside fracture line ends had no remarkable significance by further binary comparison (P > 0.05). Thetwo screws which were just located near the two fringes of the fracture line undertaken more stress and collapsed easily. It wouldbe better to choose the screw with the screw pore of diameter 100-2.5 mm longer than the present one, in order to increase itsstability to avoid the breakage.关键词
数字散斑方法/肱骨干/骨折/钢板/生物力学分类
医药卫生引用本文复制引用
赵云伟,周轶平,陈英杰,李仲铭,叶宏,孔维云..数字散斑法测量加载100N与400N肱骨干骨折钢板固定下的位移[J].中国组织工程研究与临床康复,2011,15(43):7991-7993,3.基金项目
云南省科技厅-昆明医学院联合专项基金资助项目(2007C0044R,2009CD188) （2007C0044R,2009CD188）
云南省高校药学重点实验室创新平台建设专项基金(6010902009-2010ZL004) （6010902009-2010ZL004）
云南省教育厅科学研究基金立项资助项目(2010Y191,07Z10199). （2010Y191,07Z10199）
