骨折韧性取决于骨骼位置——一项针对股骨颈、股骨干和胫骨干的研究。
Fracture toughness is dependent on bone location--a study of the femoral neck, femoral shaft, and the tibial shaft.
作者信息
Brown C U, Yeni Y N, Norman T L
机构信息
Departments of Mechanical and Aerospace Engineering and Orthopedics, Musculoskeletal Research Center, West Virginia University, Morgantown, West Virginia 26506-9196, USA.
出版信息
J Biomed Mater Res. 2000 Mar 5;49(3):380-9. doi: 10.1002/(sici)1097-4636(20000305)49:3<380::aid-jbm11>3.0.co;2-w.
The fracture toughness of the right femoral neck, femoral shaft, and tibial shaft of matched cadaveric bones, ages 50 to 90 years, was compared. Results of this study indicate that tensile (G(Ic)) and shear (G(IIc)) fracture toughness vary depending on bone location. The femoral neck has the greatest resistance to crack initiation for both tension and shear loading while the femoral shaft has the least. The relationship between age and the fracture toughness of the femoral neck and shaft was investigated. G(c) of the femoral shaft significantly decreased with age for mode I and was nearly significant for mode II. Fracture toughness of the femoral neck did not change with age for the later decades of life. Implications of these findings are discussed.
对年龄在50至90岁的匹配尸体骨骼的右股骨颈、股骨干和胫骨干的断裂韧性进行了比较。本研究结果表明，拉伸（G(Ic)）和剪切（G(IIc)）断裂韧性因骨骼位置而异。股骨颈在拉伸和剪切载荷下对裂纹萌生的抵抗力最强，而股骨干的抵抗力最弱。研究了年龄与股骨颈和股骨干断裂韧性之间的关系。对于I型，股骨干的G(c)随年龄显著降低，对于II型则接近显著。在生命的后几十年中，股骨颈的断裂韧性不随年龄变化。讨论了这些发现的意义。
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