摘要
作者自行设计制造了一种用于治疗股骨颈骨折的加压螺纹钉,并将其与斯氏针、三角针进行生物力学比较研究。选20个成年男性股骨上段防腐标本随机分为3组,将标本锯成内收经颈型股骨颈骨折。标本内固定后,在ZDM—500型试验机上进行轴压试验。采用位移传感器,应变仪和X—Y函数记录仪同时记录不同载荷下骨折部张开位移及旋转位移。结果显示:加压螺纹钉组在骨折标本张开位移为3mm时,其承载力及最大承载力明显大于三角针及斯氏针组(P<0.01,及P<0.05),且其旋转位移明显小于其他两组(P<0.01);三角针及斯氏针两组间比较无显著性差异(P>0.05)。
A new compression-screw for fixation of femoral neck fractures was made to compare with the Steinmann pin and triangular pin. The proximal segments of male cadaveric femora were chosen as the testic specimen. Twenty specimens were divided into three groups at random. A neck osteotomy was made on all specimens simulating an adduction type of fractures. After the 3 different types of biomechanical internal fixations were completed in the 3 groups respectively, tests were performed on the ZDM-500 testing machine, simutaneously, the load and the displacement at fracture site were measured by Transducer, strain gauges and X-Y function equipment.All results suggested that the maximal load and load of 3mm displacement at the osteotomy site on the compression-screw group were the biggest(P<0.01 and P<0.05) with least rotations displacement in the three groups (P<0.01). But there was no difference between steinmann and triangular pin groups statistically.
出处
《生物医学工程学杂志》
EI
CAS
CSCD
北大核心
1993年第3期254-258,共5页
Journal of Biomedical Engineering
关键词
股骨颈
骨折
内
骨折固定
生物力学
Femoral neck fracture Internal fixation Biomechanics
