Saitoh S, Nakatsuchi Y, Latta L, Milne E
From the Department of Orthopaedics, Shinshu University School of Medicine, Matsumoto City Matsumoto City, Japan; University of Miami's biomechanical laboratory at Mt. Sinai Medical Center, Miami Beach, Miami Beach, Fla.
J Shoulder Elbow Surg. 1994 Jul;3(4):234-42. doi: 10.1016/S1058-2746(09)80041-4. Epub 2009 Feb 13.
Clinical experience led us to the hypothesis that in the proximal humerus cancellous bone beneath the top part of the head is the strongest and the bone of the humeral neck is the weakest. This hypothesis was examined on dissected proximal humeri with bone mineral densitometry and an indention test. Both dual photon absorptiometry and bone mineral analyses confirmed that the top part of the humeral head was the region with the greatest amount of bone mineral. The humeral neck had approximately one half the bone mineral density of the humeral head. The cancellous bone of the neck had only one third the mechanical strength of the humeral head on the indention test. The high degree of osteoporosis of the neck region increases the difficulty of surgical treatment for displaced humeral neck fractures.
在肱骨近端，头顶部下方的松质骨最强，而肱骨颈的骨最薄弱。我们通过骨密度测量和压痕试验对解剖后的近端肱骨进行了验证。双能光子吸收法和骨矿物质分析均证实，肱骨头顶部是骨矿物质含量最高的区域。肱骨颈的骨矿物质密度约为肱骨头的一半。在压痕试验中，颈部的松质骨机械强度仅为肱骨头的三分之一。颈部区域的高度骨质疏松增加了肱骨颈移位骨折手术治疗的难度。
