Paqué F, Sirtes G
Division of Endodontology, Department of Preventive Dentistry, Periodontology, and Cariology, University of Zurich Centre for Dental Medicine, Zurich, Switzerland.
Int Endod J. 2007 Sep;40(9):722-9. doi: 10.1111/j.1365-2591.2007.01298.x. Epub 2007 Jul 23.
To compare the long-term apical sealing ability of gutta-percha/AH Plus and Resilon/Epiphany.
The root canals of 90 single-rooted human mandibular premolars with single narrow root canals were prepared with ProFile 0.4 taper instruments to apical size 40. After each instrument, the canals were irrigated with 1% sodium hypochlorite. Subsequently, the teeth were randomly divided into four groups containing 20 teeth each. Additionally, 10 prepared premolars served as positive and 10 counterparts with intact crowns as negative controls. The root canals were filled with gutta-percha/AH Plus or Resilon/Epiphany using lateral or vertical compaction. Specimens were allowed to set for 7 days at 37 degrees C and 100% humidity. Subsequently, the root fillings were removed down to the apical 4 mm. Fluid movement was then assessed using a fluid transportation model and re-evaluated after 16 months of water storage. Leakage within and between groups was compared using nonparametric tests.
Negative controls revealed no fluid movement and positive controls displayed gross fluid movement at both times of observation. At the immediate measurement, there were no significant differences between the experimental groups (Kruskal-Wallis, P > 0.05). Gutta-percha/AH Plus fillings retained their seal after 16-months storage (Wilcoxon, P > 0.05), whilst the Resilon/Epiphany groups lost their sealing capacity (Wilcoxon, P < 0.001). In these groups, 29 of the 40 specimens exhibited gross leakage similar to positive controls.
Initially, Resilon/Epiphany root fillings prevented fluid movement to the same degree as gutta-percha/AH Plus counterparts, but showed more fluid movement when tested at 16 months.
比较牙胶尖/AH Plus与Resilon/Epiphany的长期根尖封闭能力。
用Profile 0.4锥度器械将90颗单根单根管的人下颌前磨牙根管预备至根尖尺寸40。每使用一根器械后，用1%次氯酸钠冲洗根管。随后，将牙齿随机分为四组，每组20颗牙。另外，10颗预备好的前磨牙作为阳性对照，10颗完整牙冠的对应牙齿作为阴性对照。采用侧向或垂直加压法用牙胶尖/AH Plus或Resilon/Epiphany充填根管。标本在37℃、100%湿度条件下放置7天。随后，将根管充填物去除至根尖4mm处。然后使用液体传输模型评估液体移动情况，并在储存16个月后重新评估。使用非参数检验比较组内和组间的渗漏情况。
阴性对照在两次观察时均未显示液体移动，阳性对照在两次观察时均显示明显的液体移动。在即时测量时，实验组之间无显著差异（Kruskal-Wallis检验，P>0.05）。牙胶尖/AH Plus充填物在储存16个月后仍保持其封闭性（Wilcoxon检验，P>0.05），而Resilon/Epiphany组失去了其封闭能力（Wilcoxon检验，P<0.001）。在这些组中，40个标本中有29个表现出与阳性对照相似的明显渗漏。
最初，Resilon/Epiphany根管充填物阻止液体移动的程度与牙胶尖/AH Plus相当，但在16个月测试时显示出更多的液体移动。
