Application of circular statistics in the study of crack distribution around cemented femoral components.
Application of circular statistics in the study of crack distribution around cemented femoral components.
复制标题
循环统计在骨水泥股骨假体周围裂纹分布研究中的应用
DOI：
10.1016/s0021-9290(03)00091-5
复制
发表时间：
2003
影响因子：
2.4
通讯作者：
Cleary,RichardJ
中科院分区：
文献类型：
--
作者：
Mann,KennethA;Gupta,Sameer;Race,Amos;Miller,MarkA;Cleary,RichardJ
使用爬楼梯载荷对骨水泥型股骨柄结构进行循环疲劳加载，根据裂纹角位置和裂纹长度确定骨水泥鞘的疲劳损伤。从圆形统计技术被用来确定是否分布的微裂纹是均匀的。0°-90°-180°-270°的指定方向指示外侧-前-内侧-后解剖方向，裂纹的总体分布不均匀（p<0.05），平均裂纹方向位于地幔的后内侧（249°）象限。骨水泥鞘近端（后内侧; 251°）和远端（前内侧; 112°）区域的裂纹角分布也不同（p<0.025）。这些结果表明，骨水泥损坏的位置取决于解剖位置，似乎与骨水泥鞘中的拉伸应力场相对应。
Cemented stem constructs were loaded in cyclic fatigue using stair climbing loading and the resulting fatigue damage to the cement mantle was determined in terms of angular position of crack and crack length. Techniques from circular statistics were used to determine if the distribution of micro-cracks was uniform. With a designated orientation of 0°–90°–180°–270° indicating lateral–anterior–medial–posterior anatomic directions, the overall distribution of cracks was not uniform (p<0.05) with a mean crack direction in the postero-medial (249°) quadrant of the mantle. The crack angular distribution for proximal (postero-medial; 251°) and distal (antero-medial; 112°) regions of the cement mantle was also different (p<0.025). These findings suggest that the location of cement damage depends on anatomic position and appears to correspond with the tensile stress field in the cement mantle.