Okşan T, Aktener B O, Sen B H, Tezel H
Department of Endodontics, Ege University Dental Faculty, Bornova, Izmir, Turkey.
Int Endod J. 1993 Sep;26(5):301-5. doi: 10.1111/j.1365-2591.1993.tb00575.x.
The purpose of this study was to evaluate the effect of smear layer on penetration of four root sealers into dentinal tubules. Sixty-four, recently extracted, human maxillary and mandibular incisors were used. Following removal of the crowns, the pulps were extirpated and the root canals instrumented. The teeth were then divided into two groups. The teeth in the control group were irrigated with saline solution and the experimental group treated with EDTA and NaOCl. Each main group was then divided into four sub-groups and the root canals filled with Diaket, N2 Universal, SPAD and Forfenan as recommended by the manufacturers. The teeth were split longitudinally and examined using scanning electron microscopy. A quantitative assessment was made of sealer penetration into the dentinal tubules in the coronal, middle and apical parts of each root canal. It was observed that the smear layer obstructed the penetration of the tubules by the sealers. However, in the experimental group, the penetration into dentinal tubules was better with Diaket, N2 and SPAD, than with Forfenan (P < 0.01). It was concluded that this penetration could be affected by physical and chemical properties of root canal filling materials.
本研究的目的是评估玷污层对四种根管封闭剂渗入牙本质小管的影响。使用了64颗近期拔除的人类上颌和下颌切牙。去除牙冠后，摘除牙髓并对根管进行预备。然后将牙齿分为两组。对照组牙齿用盐溶液冲洗，实验组用乙二胺四乙酸（EDTA）和次氯酸钠（NaOCl）处理。每个主要组再分为四个亚组，并按照制造商的建议用Diaket、N2通用型、SPAD和福尔费南（Forfenan）充填根管。将牙齿纵向劈开，并用扫描电子显微镜进行检查。对每种根管封闭剂渗入每个根管冠部、中部和根尖部牙本质小管的情况进行了定量评估。观察到玷污层阻碍了封闭剂渗入小管。然而，在实验组中，Diaket、N2和SPAD渗入牙本质小管的情况比福尔费南更好（P < 0.01）。得出的结论是，这种渗入可能会受到根管充填材料物理和化学性质的影响。
