Sen B H, Büyükyilmaz T
Department of Endodontics, School of Dentistry, Ege University, Izmir, Turkey.
J Endod. 1998 Apr;24(4):239-43. doi: 10.1016/S0099-2399(98)80104-0.
The aim of the present study was to evaluate the effect of 4% titanium tetrafluoride (TiF4) solution on root canal walls by scanning electron microscopy. Twenty four root canals with or without a smear layer were treated with 4% TiF4 solution. Scanning electron microscopic observation of the smeared canal walls showed that TiF4 solution modified the smear layer and produced a massive structure. In smear-free group, a granular coating was formed on intertubular and intratubular dentin. The stability of this layer was tested further with EDTA and/or NaOCl irrigations on 20 additional specimens. It was observed that none of the solutions was able to remove this modified smear layer. These results may indicate that this extremely stable structure may be advantageous in endodontics, because it can prevent further infection of root canal dentin by sealing off the tubules permanently, and can reduce microleakage by preventing further dissolution and disintegration of the smear layer.
本研究的目的是通过扫描电子显微镜评估4%四氟化钛（TiF4）溶液对根管壁的影响。对24个有或没有玷污层的根管用4% TiF4溶液进行处理。对有玷污层的根管壁进行扫描电子显微镜观察显示，TiF4溶液改变了玷污层并产生了块状结构。在无玷污层组中，在管间和管内牙本质上形成了颗粒状涂层。在另外20个标本上用乙二胺四乙酸（EDTA）和/或次氯酸钠（NaOCl）冲洗进一步测试该层的稳定性。观察到没有一种溶液能够去除这种改性玷污层。这些结果可能表明，这种极其稳定的结构在牙髓病学中可能是有利的，因为它可以通过永久封闭小管来防止根管牙本质的进一步感染，并通过防止玷污层的进一步溶解和崩解来减少微渗漏。
