Abstract:

BACKGROUND: Although a variety of mechanics study on the mechanical characteristics of the pelvis has been performed, but the exact stress distribution in the region remains unclear.
ONJECTIVE: To observe the gross distribution of bone trabecula around acetabulum and compare with existing biomechanical research results.
METHODS: Four dry pelvic specimens were cut in accordance with the plane which composed of acetabular edge and the plane of obturator in order to observe the distribution patterns of trabecular bone on the cross-section, and to observe the gross distribution of trabecula around acetabulum.
RESULTS AND CONCLUSION: The trabeculae of hip bone were divided into three groups. ①Sacropubic bundle: It ran from the auricular surface, posterior superior iliac spine and posterior inferior iliac spine to pubic symphsis along the iliopectinal line, and part of the trabecula terminated in the posterior superior acetabular. ②Iliocotyloid bundle: It ran from the greater sciatic notch of the auricular surface to the superior posterior acetabular, and located in the shallow layer of the sacropubic bundle. ③Ilioischial bundle: From the region of the iliac crest to the ischial tuberosity, part of the trabecula terminated in the anterior superior acetabular. High-density trabecular net transversely located at the level of the sciatic notch, defined by a distinct saltire-shaped crossing over the acetabulum between the sacropubic and the ilioischial bundles. The human hip acetabulum was constituted by iliocotyloid bundle, sacropubic bundle and ilioischial bundle. High-density trabeculum net transversely located at the level of the sciatic notch, iliopubic eminence and the cross-section of sacropubic and the ilioischial bundles. This is consistent with the stress distribution and loading of the acetabular region in the current research.