El Hachem Roula, Le Brun Guy, Le Jeune Bernard, Pellen Fabrice, Khalil Issam, Abboud Marie
Department of Endodontics, Faculty of Dentistry, Saint Joseph University, P. O. Box 11-5076 Riad el-Solh, Beirut 1107 2180, Lebanon.
Laboratoire OPTIMAG, University of Bretagne Occidentale, 6 Avenue Le Gorgeu, C.S. 93837, 29238 Brest cedex 3, France.
Dent J (Basel). 2018 Sep 3;6(3):45. doi: 10.3390/dj6030045.
This study compared the effects of a conventional endodontic needle with an agitation system on a novel tricalcium silicate-based sealer (NTS) in terms of dentinal tubule penetration and interfacial adaptation to a root canal. Fifty single-rooted, recently-extracted human maxillary central incisors were randomly distributed into two homogeneous groups characterized by two different final cleansing systems: Conventional endodontic needle, or EndoActivator. After instrumentation, all the teeth were filled with the gutta-percha single cone technique in conjunction with the novel tricalcium silicate-based sealer. Teeth were horizontally sectioned at 1 and 5 mm from the apex and were observed under a confocal laser scanning microscope (CLSM) at five magnifications. The maximum, mean, and the circumferential percentage of the sealer penetration inside the tubules were measured. Moreover, the gap width was evaluated using Image J software (National Institutes of Health, Bethesda, MD). EndoActivator did not result in a significantly higher circumferential percentage of sealer penetration than conventional irrigation ( > 0.05). However, the gap width was significantly lower with EndoActivator, compared to conventional needles at both 1 mm ( = 0.035) and 5 mm ( = 0.038). The EndoActivator irrigation system did not significantly improve the NTS penetration, as compared to the conventional endodontic needle irrigation. Activation of the irrigation reduced the gap width significantly.
本研究比较了传统牙髓针与一种搅拌系统对一种新型硅酸三钙基封闭剂（NTS）在牙本质小管渗透及与根管的界面适应性方面的影响。五十颗单根、近期拔除的人类上颌中切牙被随机分为两组，这两组的区别在于两种不同的最终冲洗系统：传统牙髓针或EndoActivator。根管预备后，所有牙齿均采用牙胶尖单尖法结合新型硅酸三钙基封闭剂进行充填。在距根尖1毫米和5毫米处将牙齿水平切片，并在共聚焦激光扫描显微镜（CLSM）下以五种放大倍数进行观察。测量封闭剂在小管内渗透的最大值、平均值和圆周百分比。此外，使用Image J软件（美国国立卫生研究院，马里兰州贝塞斯达）评估间隙宽度。EndoActivator在封闭剂渗透的圆周百分比方面并未比传统冲洗方法有显著提高（P>0.05）。然而，与传统牙髓针相比，EndoActivator在1毫米处（P=0.035）和5毫米处（P=0.038）的间隙宽度均显著更低。与传统牙髓针冲洗相比，EndoActivator冲洗系统并未显著提高NTS的渗透率。冲洗的激活显著减小了间隙宽度。
