Breul R, Kurrat H J, Oberländer W
Gegenbaurs Morphol Jahrb. 1981;127(3):364-81.
From human humerus diaphyses 5 cross-sections of well defined sites were taken. The shape of these cross-sections was described by x,y-coordinate data. The size of the cross-section area, the positions of the primary and secondary stress minimum as well as the positions of the primary and secondary stress maximum were analysed. The plane with the lowest average stress over the total area of the sites 1, 2 and 3 shifts about 58 degrees from medial = 0 degrees. The increase of stress in direction to the bending planes with a maximum of average stress is lower than 30%. The humerus diaphysis in the proximal part (sites 1, 2, 3) seems to be relatively well adapted to the movements of abduction, adduction, anteversion, and retroversion. However the plane of best adaption seems to be the sagittal one. The cross-sectional site 4 represents a transitional segment with 2 types of torsion of the plane of best adaption to bending stresses. Type A is characterised by a enormous torsion between the cross-sectional sites 4 and 5, type B between the sites 3 and 4. The plane with the lowest average stress of the cross-sectional site 5 is located by 127 degrees. In this plane the diaphysis seems to be well adapted to bending forces in a more sagittal plane.
从人肱骨骨干获取了5个定义明确部位的横截面。这些横截面的形状由x、y坐标数据描述。分析了横截面面积的大小、主应力最小值和次应力最小值的位置以及主应力最大值和次应力最大值的位置。在部位1、2和3的总面积上平均应力最低的平面从内侧=0度偏移约58度。在平均应力最大的方向上，朝向弯曲平面的应力增加低于30%。肱骨近端部分（部位1、2、3）似乎相对较好地适应了外展、内收、前倾和后倾运动。然而，最佳适应平面似乎是矢状面。横截面部位4代表一个过渡段，对于弯曲应力，最佳适应平面有两种扭转类型。A型的特征是在横截面部位4和5之间有巨大扭转，B型在部位3和4之间。横截面部位5平均应力最低的平面位于127度处。在这个平面上，骨干似乎在更矢状的平面上很好地适应了弯曲力。
