Evidence for rapid multipolar and slow unipolar production of human cellular and acellular cementum matrix with intrinsic fibers.
Evidence for rapid multipolar and slow unipolar production of human cellular and acellular cementum matrix with intrinsic fibers.
复制标题
具有内在纤维的人类细胞和无细胞牙骨质基质的快速多极和慢速单极生产的证据。
DOI：
10.1111/j.1600-051x.1990.tb01690.x
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发表时间：
1990
影响因子：
6.7
通讯作者：
Hubert E. Schroeder
中科院分区：
文献类型：
--
作者：
Dieter D. Bosshardt;Hubert E. Schroeder
牙根牙骨质的发生很少在动物模型中进行研究，例如，在小鼠、大鼠和狗身上，但很少在人类身上。本研究是基于8个前磨牙（4上颌和4下颌，7第一和1第二）从一个大的收集新鲜提取的人牙。所有牙齿均无疾病，牙根发育至其长度的约50-80%。在EDTA脱钙后，根尖的一半被轴向分为近中和远中部分。后者被细分为4个切片，在冠状-顶端方向切割。将这些切片进行Epon包埋并切割以在光和透射电子显微镜中进行检查。结果发现，2个基本上不同的模式，牙骨质基质生产发生在或接近前进根边缘。这两种模式，即，多极与单极基质的产生导致细胞（CIFC）或非细胞内在纤维牙骨质（AIFC）。这两个品种都不包含Sharpey纤维，并仅限于通常覆盖着细胞混合分层牙骨质（CMSC）的根区域。通过与最近发表的数据牙骨质附着率的比较，建议多极模式是一种快速的形式，而单极模式是一种缓慢的形式产生内在的纤维牙骨质。
The genesis of root cementum has been studied infrequently in animal models, e.g., in mice, rats and dogs, but rarely in the human. The present study was based on 8 premolars (4 maxillary and 4 mandibular, 7 first and 1 second) selected from a large collection of freshly extracted human teeth. All teeth were free of disease and presented with roots developed to about 50-80% of their length. After decalcification in EDTA, the apical half of the roots was divided axially into mesial and distal portions. The latter were subdivided into 4 slices cut in the corono-apical direction. These slices were Epon-embedded and cut for examination in the light- and transmission electron microscope. It was found that 2 basically different modes of cementum matrix production occurred at or near the advancing root edge. These 2 modes, i.e., the multipolar versus unipolar matrix production, resulted in either cellular (CIFC) or acellular intrinsic fibre cementum (AIFC). Both varieties did not contain fibres of Sharpey and were restricted to regions of the root usually covered with cellular mixed stratified cementum (CMSC). By comparison with recently published data on the rate of cementum apposition, it is suggested that the multipolar mode is a rapid form, whereas the unipolar mode is a slow-rate form of producing intrinsic fibre cementum.
影响因子：
3.5
作者：
CHO, MI;GARANT, PR
通讯作者：
GARANT, PR