Morphological analysis of the acetabular cartilage surface in elderly subjects
Morphological analysis of the acetabular cartilage surface in elderly subjects
复制标题
老年髋臼软骨表面形态分析
DOI：
10.1007/s00276-015-1427-6
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Sugamoto K
中科院分区：
文献类型：
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作者：
Akiyama K;Sakai T;Koyanagi J;Yoshikawa H;Sugamoto K
目的髋臼软骨表面的几何形状在髋关节生物力学中起着重要的作用。本研究的目的是利用3D-数字化仪分析老年捐献身体髋臼关节软骨表面的形态。方法用3D-数字化仪对12名受试者(平均年龄85岁)的20个偏侧髋关节进行扫描。每个髋臼表面模型分为四个区域：前上(AS)、前下(AI)、后上(PS)和后下(PI)。在整个髋臼和各区域计算髋臼球体半径和髋臼球心到髋臼软骨表面距离的标准差(SD)。在整个髋臼中，计算髋臼表面模型到未穿过髋臼表面模型的最大球体之间的距离作为推测的股骨头，然后每隔0.5 mm绘制分布图。结果AS组的SD显著大于AI组(P=0.006)和PI组(P=0.001)。PS组的标准差明显大于PI组(p=0.005)。最接近的区域(0~0.5 mm)倾向于分布在髋臼前缘或后上缘。结论股骨头与髋臼的接触可能始于月骨表面的周边，尤其是在前部或后上部。从髋臼形态来看，由于直接接触机制，位于髋臼前上缘或后上缘的髋臼关节软骨可能更脆弱。
PurposeThe geometry of acetabular cartilage surface plays an important role in hip joint biomechanics. The aim of this study was to analyze the morphology of acetabular articular cartilage surface in elderly donated bodies to science using a 3D-digitizer.MethodsTwenty hemipelves from 12 subjects (mean ages 85 years) were scanned with 3D-digitizer. Each acetabular surface model was divided into four regions: anterosuperior (AS), anteroinferior (AI), posterosuperior (PS), and posteroinferior (PI). In the global acetabulum and each region, the acetabular sphere radius and the standard deviation (SD) of the distance from the acetabular sphere center to the acetabular cartilage surface were calculated. In the global acetabulum, the distance between the acetabular surface model and the maximum sphere which did not penetrate over the acetabular surface model was calculated as the inferred femoral head, and then the distribution was mapped at intervals of 0.5 mm.ResultsThe SD in AS was significantly larger than that in AI (p= 0.006) and PI (p= 0.001). The SD in PS was significantly larger than that in PI (p= 0.005). The closest region (0–0.5 mm) tended to be distributed at anterior or posterosuperior acetabular edge.ConclusionsThe contact between the femoral head and acetabulum might start at the periphery of the lunate surface, especially in the anterior or posterosuperior region. From viewpoint of acetabular morphology, the acetabular articular cartilage in the anterior or posterosuperior edge could be more vulnerable due to direct contact mechanism.