Sealer penetration and marginal permeability after apicoectomy varying retrocavity preparation and retrofilling material.
Sealer penetration and marginal permeability after apicoectomy varying retrocavity preparation and retrofilling material.
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根尖切除术后不同后腔准备和后填充材料的封闭剂渗透性和边缘渗透性。
DOI：
10.1590/s0103-64402006000400011
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发表时间：
2006
影响因子：
--
通讯作者：
J. L. Lage
中科院分区：
文献类型：
--
作者：
R. Winik;Â. Araki;José Augusto Alves Negrão;M. BeLLO;J. L. Lage
根尖切除术失败通常与后腔边缘密封不当有关，这使得微生物及其产物从根管系统渗透到根尖周。本研究评估了使用 Er;Cr:YSGG 激光进行腔内照射并使用 MTA 或氰基丙烯酸酯进行回填后，管封闭剂的管状渗透性和边缘渗透性。对22颗单根牙进行牙髓治疗，切除根尖3 mm，用低速车针修整根端。 20根被随机分配到4组（n=5）：GI和GII——分别用MTA和氰基丙烯酸酯进行再填充； GIII 和 GIV - 用 Er;Cr:YSGG 激光（2.78 微米，4 W，20 Hz，70.8 J/cm(2)）进行后腔照射，并分别用 MTA 和氰基丙烯酸酯进行后填充。其余2根作为阳性和阴性对照。罗丹明 B 染料渗透分析 (p=0.05) 表明，激光照射和 MTA 回填表现出显着更高的渗透率 (p<0.05)。无论在后腔上使用激光还是不使用激光，用氰基丙烯酸酯再填充显示出明显较低的渗透性。 SEM 分析显示，与 MTA 相比，氰基丙烯酸酯对牙本质小管的渗透更多，表明边缘密封更有效。基于这些结果，可以得出结论，无论采用哪种修复方法，氰基丙烯酸酯都提供了渗透性较低的修复，这表明为根尖愈合的建立提供了更有利的条件。
Apicoectomy failure is generally related to inappropriate marginal sealing of the retrocavity, which allows percolation of microorganisms and their products from root canal system to periapex. This study evaluated tubular penetration of canal sealers and marginal permeability after retrocavity irradiation with Er;Cr:YSGG laser and retrofilling with MTA or cyanoacrylate. Twenty-two single-rooted teeth were decoronated and endodontically treated, their apical 3 mm were resected and the root ends were retroprepared with a low-speed bur. Twenty roots were randomly assigned to 4 groups (n=5): GI and GII--retrofilling with MTA and cyanoacrylate, respectively; GIII and GIV--retrocavity irradiation with Er;Cr:YSGG laser (2.78 microm, 4 W, 20 Hz, 70.8 J/cm(2)) and retrofilling with MTA and cyanoacrylate, respectively. The remaining 2 roots served as positive and negative controls. The analysis of rhodamine B dye infiltration (p=0.05) demonstrated that laser irradiation and MTA retrofilling presented significantly higher permeability rates (p<0.05). Retrofilling with cyanoacrylate showed significantly lower permeability, either when laser was used or not on retrocavity. SEM analysis depicted more cyanoacrylate penetration through dentinal tubules when compared to MTA, suggesting a more efficient marginal sealing. Based on these results, it may be concluded that cyanoacrylate provided a less permeable retrofilling regardless of the retropreparation method, suggesting a more favorable condition to the establishment of the periapical healing.