The regulation of fiber arrangement in advanced cellular cementogenesis of human teeth.
The regulation of fiber arrangement in advanced cellular cementogenesis of human teeth.
复制标题
人类牙齿高级细胞牙骨质形成中纤维排列的调节。
DOI：
10.1111/j.1600-0765.1998.tb02296.x
复制
发表时间：
2010
影响因子：
3.5
通讯作者：
M. Wakita
中科院分区：
文献类型：
--
作者：
T. Yamamoto;T. Domon;S. Takahashi;N. Islam;R. Suzuki;M. Wakita
本研究通过光镜和电镜观察了完全成形的人前磨牙的骨水泥，以阐明成骨水泥细胞如何调节骨水泥中的纤维排列。成水泥细胞的主要纤维周围有翼状突起，其中夏普纤维较密。在面向骨骨质一侧，翼状突起被分割成与骨骨质表面平行的指状突起。观察表明，随着分割，内在纤维出现在主纤维周围，与指状突起密切相关。当Sharpey纤维很少或不存在时，当固有纤维是骨质的主要纤维成分时，成骨质细胞只有很少或没有翅状突起，但在面向骨质的一侧具有与翅状突起无关的指状突起。基于指状突的起源，主要结果表明成骨水泥细胞有两种类型：一种具有与翼状突相关的指状突，并从指状突分泌固有纤维以结合主要纤维来支撑牙齿。第二种是指状突起，与翅状突起无关，这种类型是指状突起分泌固有纤维来调节骨质厚度。
This study observed cellular cementum in fully formed human premolars by light and electron microscopy to elucidate how cementoblasts regulate the fiber arrangement in cementum. Cementoblasts had wing-like processes encircling the principal fibers, where Sharpey's fibers were dense. On the cementum-facing side, wing-like processes were segmented into finger-like processes in parallel with the cementum surface. Observations suggested that with the segmentation intrinsic fibers appeared around principal fibers in close association with finger-like processes. Where Sharpey's fibers were few or absent, where intrinsic fibers were the main fibrous element of the cementum, cementoblasts had only few or no wing-like processes, but had finger-like processes not associated with the wing-like processes on the cementum-facing side. On the basis of the origin of the finger-like processes the main results suggest that there are two kinds of cementoblasts: one has finger-like processes associated with wing-like processes and secretes intrinsic fibers from the finger-like processes to incorporate the principal fibers for tooth support. The second type has finger-like processes not associated with wing-like processes, this type secretes intrinsic fibers from the finger-like processes to adjust the cementum thickness.