从生物力学角度探讨斜形与横形骨折对骨折愈合的影响

目的 探讨斜形与横形骨折对骨折愈合速度影响的关系。方法 根据骨骼压电效应原理、临床观察、骨折临床愈合标准，并经电子计算机有限元计算，比较斜形与横形不同骨折形状骨折愈合的快慢。结果 横形骨折复位满意后固定牢固稳定，在骨折的早、中、后期均可承受压应力产生压电效应，斜形骨折则不能，而压电效应可促进骨痂生长。在悬臂梁状态（相当于上肢平举）骨折端所受应力与斜形或横形骨折的形状并无明显关系，而与骨折部位有很大关系。结论 在同一个体、相同部位、骨折复位好的情况下横形骨折比斜形骨折愈合较快。

Influence on fracture healing by the oblique and transverse types of fractures from the view point of biomechanics

Objective:To investigate the influence of oblique and transverse types of fracture on fracture healing from the point of view of biomechanics Methods:According to the principle of piezoelectric effect?the clinical observation?the standard of the fracture clinical healing and the finite element calculation by EC,the fracture healing speed in different fracture forms were analyzed. Results:After satisfactory reduction and firm fixation,the transverse fracture produced piezoelectric effect under bearing stress in the earlier period?metaphase?anaphase of the fracture,however in the oblique fracture or the spiral fracture the piezoelectric effect did not exist;the piezoelectric effect is able to accelerate the growth of the bony callus.With arms in horizontal position,the stress of the fracture ends do not clearly relate with the types of the fracture transverse or oblique,however,it is related with the sites of the fracture. Conclusion:s The transverse fractures heal up faster than the oblique ones following satisfactory reduction.