期刊论文

中文

中华创伤杂志

1001-8050

2000

16

8

463-465

10.3760/j:issn:1001-8050.2000.08.004

香港HKRGC基金!资助项目 （HKU475 /96M）；

本校为第一机构

目的　探讨人胸腰椎微骨折与疲劳的关系。　方法　采用 7具成人T12 ～L4 胸腰椎标本 ,随机分为 5组 :Ⅰ ,对照组 （不施加任何载荷 ,标本数 =6 ） ;Ⅱ ,轴向压缩破坏组 （标本数 =6 ） ;Ⅲ～Ⅴ为疲劳载荷组 （每组标本数 =7）。力学测试前测试所有标本的骨密度。疲劳组的载荷频率为 2Hz,疲劳次数为 2 0 0 0 0次。Ⅲ～Ⅴ疲劳组的疲劳载荷分别为II组破坏载荷的 10 % ,2 0 %和30 %。力学测试后拍摄X线平片。用环钻在每个椎体上取 4个圆柱形骨标本。将骨标本在碱性复红中染色后制成骨切片 ,显微镜下计数 3个区域的微骨折 ,并应用体视学的方法计算其密度。结果　疲劳后标本的X线平片未见异常 ,且Ⅳ组...

Objective To explore the relationship between fatigue and microfracture of human thoracolumbar vertebrae. Methods T 12 ～L 4 thoracolumbar of 33 human vertebrae were obtained from 7 adult male cadavers. The specimens were randomly divided into 5 groups: Group 1 ( controls without loading, n =6), Group 2 (load to failure with axial compression, n =6); and Groups 3,4 and 5 (loading with cyclic compression, n =7 in each group). Cyclical compression was performed for 20 000 cycles with a loading frequency of 2 Hz in Groups 3,4 and 5, and the load m...