DENTINAL TUBULE OCCLUSION AND ROOT HYPERSENSITIVITY
DENTINAL TUBULE OCCLUSION AND ROOT HYPERSENSITIVITY
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DOI：
10.1902/jop.1991.62.7.421
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发表时间：
1991-07-01
影响因子：
4.3
通讯作者：
VANDYKE, TE
中科院分区：
文献类型：
--
作者：
KERNS, DG;SCHEIDT, MJ;VANDYKE, TE
先前的研究已经证实，牙根敏感部分是由于牙根表面的牙本质小管开放。 本研究的目的是纵向评估各种临床程序，包括洁治和根面平整术以及草酸钾的应用对牙本质小管阻塞的影响。 建立了牙本质表面的活体模型。 从紧挨CEJ下方的拔牙牙根中取出6个2 mm x 3 mm切片。 将来自每个供体的经处理的牙本质样本的一半并入供体佩戴的可摘义齿中，另一半用作基线。 牙本质样品在1周时通过扫描电子显微镜进行评价。 在第0天，由于存在玷污层或草酸盐晶体，在任何样品中均未观察到开放小管。 根平面样本的评价显示，到7天，小管已重新打开。 用草酸钾处理的样品在7天时显示出很少的草酸盐晶体，显示出开放的小管。 用EDTA蚀刻对照样品，并以相同的方式进行评价。 尽管在EDTA蚀刻的对照样品中小管的数量没有显著变化，但小管的直径在4周时显著降低。 可以得出结论，建立玷污层或应用渗透酸盐封闭牙本质小管以降低敏感性是相对短暂的。 这些程序可以在小管自然闭塞之前提供患者舒适度。
PREVIOUS STUDIES HAVE ESTABLISHED that root sensitivity is due in part to open dentinal tubules at the root surface. The purpose of this study was to longitudinally evaluate the occlusion of dentinal tubules by various clinical procedures including scaling and root planing and the application of potassium oxalate. A model was developed to evaluate dentinal surfaces in vivo. Six 2 mm x 3 mm sections were taken from the roots of extracted teeth immediately below the CEJ. One half of the treated dentin samples from each donor was incorporated into the removable denture worn by the donor and the other half served as baseline. The dentin samples were evaluated at 1 week by scanning electron microscopy. At day zero no open tubules were observed in any of the samples due to the presence of a smear layer or oxalate crystals. Evaluation of root planed samples revealed that by 7 days the tubules had re-opened. The samples which had been treated with potassium oxalate showed few oxalate crystals by 7 days revealing open tubules. Control samples were etched with EDTA and evaluated in the same manner. Although the number of tubules did not significantly change in the EDTA etched control samples, the diameter of the tubules dramatically decreased by 4 weeks. It can be concluded that the creation of a smear layer or application of oxalates to occlude dentinal tubules to reduce sensitivity are relatively short-lived. These procedures may provide patient comfort prior to natural occlusion of the tubules.