THE ORGANIC ELEMENTS OF THE ENAMEL .2. THE ORGANIC FRAMEWORK OF THE INTERNAL PART OF THE ENAMEL, WITH SPECIAL REGARD TO THE ORGANIC BASIS FOR THE SO-CALLED TUFTS AND SCHREGER BANDS
THE ORGANIC ELEMENTS OF THE ENAMEL .2. THE ORGANIC FRAMEWORK OF THE INTERNAL PART OF THE ENAMEL, WITH SPECIAL REGARD TO THE ORGANIC BASIS FOR THE SO-CALLED TUFTS AND SCHREGER BANDS
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DOI：
10.1177/00220345490280060401
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发表时间：
1949-01-01
影响因子：
7.6
通讯作者：
SOGNNAES, RF
中科院分区：
文献类型：
--
作者：
SOGNNAES, RF
用5%三氯乙酸低温脱矿法分离成人牙齿的有机骨架，并通过双眼观察、显微解剖、涂片和石蜡切片进行检查。与均匀的外部部分（具有宽且笔直的棱镜）相反，牙釉质的内部有机框架显示出排列在纵向波纹段中的密集棱镜鞘。在横切的石蜡切片中观察，发现这些较致密的节段的中心部分是所谓的簇的出现的原因。从纵切面上看，器质性骨架的波纹状结构在大体上可见的施氏带中反映出来，表明这些带与钙化的类型或程度无关。有人建议，变形。在胚胎学上先于牙釉质形成的牙本质外表面的结构可能与内牙釉质中的有机框架的这种模式有关，并且甚至可能在牙釉质的表面纹理中反映出来，在这种情况下，扇形牙本质表面仅覆盖有一层薄薄的牙釉质壳。
The organic framework of adult human teeth was isolated by a low-temp, de-mineralization in 5% trichloro-acetic acid and examined through binocular observation, microdissection, smears, and paraffin sections. In contrast to the homogeneous external portion, with its wide and straight-running prisms, the internal organic frame-work of the enamel exhibited densely packed prism sheaths arranged in longitudinal corrugated segments. Viewed in transversely cut paraffin sections the central part of these denser segments were found to be responsible for the appearance of the so-called tufts. Viewed in a longitudinal plane the corrugated patter of the organic framework reflected itself in grossly visible Schreger''s bands, indicating that these bands are independent of the pattern or degree of calcification. It is suggested that the morph. of the external dentin surface, which embryologically precedes the formation of enamel, may have a bearing on this pattern of the organic framework in the internal enamel, and may even be reflected in the surface texture of the enamel in cases where a scalloped dentin surface is covered with only a thin shell of enamel.