Dorr L D, Bechtol C O, Watkins R G, Wan Z
Bone and Joint Institute at Good Samaritan Hospital, Los Angeles, California 90017, USA.
J Arthroplasty. 2000 Oct;15(7):890-900. doi: 10.1054/arth.2000.8323.
Acetabular bone structure is not the same in all patients and can be defined by the radiolucent triangle superior to the acetabulum. Of 132 hips, 81 had an isosceles triangular shape, which was named type A acetabulum. Forty-six hips had an extension of the triangle into the teardrop, which created a thickened medial wall and was named type B. Five hips had a right-angle triangle, which was found only with congenital disease of the hip and was named type C. The density of the superior acetabular bone in the triangle could be normally radiolucent (stage I), have vertical and transverse trabeculae throughout the triangle (stage II), or have the triangle filled with bone and cysts (stage III). The relationship between progressive radiolucent lines and acetabular type showed that type A3 (thin medial wall with dense triangle bone) had the highest incidence of progressive radiolucent lines (P < .05).
所有患者的髋臼骨结构不尽相同，可通过髋臼上方的透亮三角形来界定。在132例髋关节中，81例呈等腰三角形，被命名为A型髋臼。46例髋关节的三角形延伸至泪滴，形成增厚的内侧壁，被命名为B型。5例髋关节呈直角三角形，仅见于先天性髋关节疾病，被命名为C型。三角形内髋臼上方骨的密度通常可为透亮（I期），整个三角形内有垂直和横向小梁（II期），或三角形内充满骨和囊肿（III期）。进展性透亮线与髋臼类型之间的关系表明，A3型（内侧壁薄且三角形骨致密）进展性透亮线的发生率最高（P < 0.05）。
