Yeung Celine, Deluce Simon, Willing Ryan, Johnson Marjorie, King Graham J W, Athwal George S
Department of Anatomy and Cell Biology, Western University, London, Ontario, Canada.
Hand and Upper Limb Centre, St Joseph's Health Care, Western University, London, Ontario, Canada.
J Hand Surg Am. 2015 Dec;40(12):2364-71.e1. doi: 10.1016/j.jhsa.2015.09.005.
To characterize the regional variations in cartilage thickness around the radial head.
We dissected 27 cadaveric radii and scanned them with computed tomography in neutral position. Three-dimensional cartilage and subchondral bone surface models were generated from computed tomography scans and 2 independent observers processed them through a computer program to obtain cartilage thickness measurements. These measurements were taken at 41 predetermined landmarks around the periphery of the radial head and within the articular dish.
At the periphery of the radial head, cartilage was thickest in the posteromedial region. Thickness values within the articular dish were similar but increased toward the rim. Regional variations within the rim (range, 0.76-1.73 mm) were also detected with the thickest region located anteriorly and thinnest region laterally. In addition, cartilage was significantly thicker in male relative to female specimens.
Regional variations in cartilage thickness are present around the periphery and rim and within the articular dish of the radial head.
Cartilage thickness across the articular dish may contribute to dish depth and the radius of curvature. This may be clinically important for the design of anatomic implants, because accounting for such subtle contours could help to restore radiocapitellar concavity-compression stability better.
描述桡骨头周围软骨厚度的区域差异。
我们解剖了27具尸体的桡骨，并在中立位用计算机断层扫描进行扫描。从计算机断层扫描生成三维软骨和软骨下骨表面模型，2名独立观察者通过计算机程序对其进行处理，以获得软骨厚度测量值。这些测量在桡骨头周边和关节盘内的41个预定地标处进行。
在桡骨头周边，软骨在近后内侧区域最厚。关节盘内的厚度值相似，但向边缘增加。边缘内也检测到区域差异（范围为0.76 - 1.73毫米），最厚区域位于前方，最薄区域位于外侧。此外，男性标本中的软骨明显比女性标本厚。
桡骨头周边、边缘和关节盘内存在软骨厚度的区域差异。
关节盘上的软骨厚度可能有助于关节盘深度和曲率半径。这在解剖植入物设计中可能具有临床重要性，因为考虑到这些细微轮廓有助于更好地恢复桡骨头凹面 - 压缩稳定性。
