Bercy P, Frank R M
J Biol Buccale. 1980 Dec;8(4):353-73.
In scanning electron microscopy (SEM) of the dental root surfaces human cementum resorption by giant multinucleated cells appeared similar in temporary and permanent teeth. Thus the resorbed zones were formed by associated Howship lacunae. On the lacunae walls, the openings of numerous tubules of the cementocytic lacunae were seen. Such aspects were noted during the physiological resorption of temporary teeth. The cementum surface of permanent teeth without pathology, presented frequently such resorption aspects around their apical regions as well as on other regions, the resorbed areas being more often not widespread. Similar resorption zones were observed in contact with paradental granulomas and along granulation tissue in cases of chronic periodontitis. Orally exposed cementum, after gingival recession, was mainly characterized by the disappearance of the typical dappled aspect of the cellular cementum and by the presence on the smoothed surface of numerous striate. The cementum wall of the periodontal pockets showed always the dappled aspect with the occasional presence of incipient calculus formation as well as calcified fibrillar elements. These calcified fibrils were either short covering the whole surface or were longer being disposed parallel to the surface in interwoven networks or in tufts. Cementum curetage followed by root planning removed the calculus completely. Before root planning, the presence of numerous striae were noted. They disappeared following the action of a rubber cup and an abrasive polishing paste. Ultrasonic scaling gave a relatively clean root surface. However, the cementum surface, apparently devoid fo calculus under visual examination, showed in places the presence of thin calculus layers under the SEM.
在牙根表面的扫描电子显微镜（SEM）观察中，人牙骨质被巨大多核细胞吸收的情况在乳牙和恒牙中相似。因此，吸收区由相关的豪氏陷窝形成。在陷窝壁上，可以看到牙骨质细胞陷窝的许多小管开口。在乳牙的生理性吸收过程中观察到了这些情况。无病变恒牙的牙骨质表面，在其根尖区域以及其他区域常常呈现出这种吸收情况，吸收区域通常不太广泛。在慢性牙周炎病例中，与牙周肉芽肿接触处以及沿肉芽组织也观察到了类似的吸收区。牙龈退缩后口腔暴露的牙骨质，主要特征是细胞性牙骨质典型的斑纹状外观消失，且在平滑表面上有许多条纹。牙周袋的牙骨质壁总是呈现出斑纹状外观，偶尔有早期牙石形成以及钙化纤维成分。这些钙化纤维要么短而覆盖整个表面，要么较长，以交织网络或束状平行于表面排列。牙骨质刮治后进行根面平整可完全去除牙石。在根面平整之前，注意到有许多条纹。在使用橡皮杯和研磨抛光膏处理后，它们消失了。超声洁治可使牙根表面相对清洁。然而，在视觉检查中看似没有牙石的牙骨质表面，在SEM下显示有些地方存在薄的牙石层。
