Daneshpooy M, Azar F Pournaqi, Nouri F, Safaralizadeh Reza
Department of Operative Dentistry, Dental Faculty, Tabriz University of Medical Sciences, Tabriz, IRN.
Dental and Periodontal Research Center, Dental Faculty, Tabriz University of Medical Sciences, Tabriz, IRN.
Cureus. 2024 Jan 28;16(1):e53116. doi: 10.7759/cureus.53116. eCollection 2024 Jan.
Background and purpose Color change caused by materials used for endodontic treatment is an important clinical issue. The current research examined the impact of internal bleaching with 10% carbamide peroxide on discolored teeth resulting from various types of sealers. Materials and methods In this study, 36 anterior teeth were cut from 1 mm beneath the cementoenamel junction (CEJ), and the samples were divided into three groups of 12. Then, AH26 (Tulsa Dental, Tulsa, OK), Endofill (Herpo Produtos Dentários Ltda, Petrópolis, Brazil), and AH Plus (Dentsply DeTrey, Konstanz, Germany) color change potential sealers were placed inside the pulp chamber. The cervical access cavity was covered with a thin layer of glass ionomer. After one month, the material was removed, and bleaching was done with 10% carbamide peroxide. The color of the samples was measured by a spectrophotometer before bleaching, one week after bleaching, and one week after bleaching again. The data were subjected to statistical analysis using the Statistical Package for Social Sciences (SPSS) software version 16 (IBM SPSS Statistics, Armonk, NY), with a significance level set at P<0.05. Results The results showed that the factor of time and material used and the opposing effect of these two on the amount of L and ΔE were statistically significant (P<0.05). After one to two weeks of internal bleaching, all groups showed some degree of reduction in sealer-induced discoloration. In addition, in all groups, the largest difference in L was related to the difference in L0 and L2 (before bleaching and one week after bleaching again), and the lowest difference was related to the difference in L0 and L1. Also, the highest ΔE(T0,T1) belonged to the Endofill group, and this significantly differed from the AH26 group. AH26 showed the lowest value of ΔE(T0,T1), and after two weeks, the ΔE of all groups was higher than the clinically observable limit. The highest ΔE(T2,T0) among the groups belonged to the Endofill group. The ΔE(T2,T0) of AH26 and Endofill was significantly higher than AH Plus. Among all ΔE values, the AH Plus group had the lowest values. Conclusion Color change caused by Endofill and AH26 sealers showed a better response to internal bleaching than the AH Plus sealer.
牙髓治疗所用材料导致的牙齿变色是一个重要的临床问题。当前研究考察了10%过氧化脲进行内漂白对因各类封闭剂导致变色牙齿的影响。
本研究中，从牙骨质牙釉质界（CEJ）下方1毫米处截取36颗前牙，样本分为三组，每组12颗。然后，将AH26（塔尔萨牙科，俄克拉荷马州塔尔萨）、Endofill（Herpo Produtos Dentários Ltda，巴西彼得罗波利斯）和AH Plus（登士柏德瑞，德国康斯坦茨）等具有变色潜能的封闭剂置于髓腔内。颈部入口洞用一层薄的玻璃离子体覆盖。一个月后，去除材料，并用10%过氧化脲进行漂白。在漂白前、漂白一周后以及再次漂白一周后，用分光光度计测量样本的颜色。使用社会科学统计软件包（SPSS）16版（IBM SPSS Statistics，纽约州阿蒙克）对数据进行统计分析，显著性水平设定为P<0.05。
结果表明，时间因素、所用材料以及这两者对L值和ΔE值的相反影响具有统计学意义（P<0.05）。内漂白一至两周后，所有组的封闭剂所致变色均有一定程度减轻。此外，在所有组中，L值的最大差异与L0和L2（漂白前和再次漂白一周后）的差异相关，最小差异与L0和L1的差异相关。而且，最高的ΔE(T0,T1)属于Endofill组，且与AH26组有显著差异。AH26的ΔE(T0,T1)值最低，两周后，所有组的ΔE均高于临床可观察极限。各组中最高的ΔE(T2,T0)属于Endofill组。AH26和Endofill的ΔE(T2,T0)显著高于AH Plus。在所有ΔE值中，AH Plus组的值最低。
与AH Plus封闭剂相比，Endofill和AH26封闭剂导致的牙齿变色对内漂白的反应更好。
