Effect of different protective base materials on hydrogen peroxide leakage during intracoronal bleaching in vitro

Rotstein, Ilan; Zyskind, D; Lewinstein, Israel; Bamberger, Nathan D.

doi:10.1016/s0099-2399(06)81310-5

Cited by 54 publications

(49 citation statements)

References 17 publications

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“…One of the disadvantages of temporary sealing materials is the necessity to remove them after bleaching process before the final restoration of the access cavity. Therefore, a 2-mm of layer of glass-ionomer cement has been recommended as a base material during bleaching, which can be left in place after bleaching and can serve as a base for the final restoration (10). Mineral trioxide aggregate (MTA) was originally developed as a root-end filling material (11).…”

Section: Introductionmentioning

confidence: 99%

Microleakage comparison of glass-ionomer and white mineral trioxide aggregate used as a coronal barrier in nonvital bleaching

Vosoughhosseini

Lotfi²,

Shahmoradi³

et al. 2011

Med Oral

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Objectives: There is some evidence that the pH at the root surface is reduced by intracoronal placement of bleaching pastes, which is known to enhance osteoclastic activity. Therefore, it is recommended that a protective barrier be used over the canal filling to prevent leakage of bleaching agents. Glass-ionomer (GI) is commonly used as a coronal barrier before nonvital bleaching. Because mineral trioxide aggregate (MTA) creates high alkalinity after mixing with water, using MTA as a protective barrier over the canal filling may not only prevent leakage of bleaching agents and microorganisms, but may prevent cervical resorption. The aim of this study was to evaluate sealing ability of white mineral trioxide aggregate (WMTA) as a coronal barrier before nonvital bleaching. Study design: Root canals of one hundred thirty human maxillary incisors were instrumented and filled with gutta-percha without sealer. Gutta-percha was removed up to 3 mm below the cementoenamel junction (CEJ). The teeth were randomly divided into six experimental groups of 20 teeth each and two control groups of 5. In three experimental groups, WMTA was packed into the canal to the level of CEJ. In the remaining experimental groups, glass-ionomer (GI) was used as a coronal barrier. After a 24-hour incubation period, one of the following three bleaching agents was placed in the access cavity of each of the WMTA or GI groups. These three bleaching agents were 30% hydrogen peroxide, sodium perborate mixed with 30% hydrogen peroxide, and sodium perborate mixed with distilled water. The bleaching agents were replaced every 3 days for three times. In the positive controls, no Comparison of glass-ionomer and white mineral trioxide aggregate used as a coronal barrier e1018 coronal barrier was used. In the negative controls, all the tooth surfaces were covered by two layers of nail varnish. Microleakage was evaluated using protein leakage test. Statistical analyses were performed with the Kruskal-Wallis and Mann-Whitney tests.Results: The experimental groups showed minimum leakage which was not significantly more than tha in the negative controls. There was no statistically significant difference in leakage between the experimental groups (p<0.05).Conclusions: This study indicated that different bleaching agents have no effect on sealing ability of WMTA.

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Section: Introductionmentioning

confidence: 99%

Microleakage comparison of glass-ionomer and white mineral trioxide aggregate used as a coronal barrier in nonvital bleaching

Vosoughhosseini

Lotfi²,

Shahmoradi³

et al. 2011

Med Oral

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“…In addition to this, the lack of adhesive system may have contributed significantly to gap formations and dye penetration. Other study [20] observed that resin composites in association to its adhesive systems can develop a satisfactory sealing ability. However, its clinical application could avoid the contact of hydrogen peroxide in some areas of the teeth.…”

Section: Materials Used As Protective Cervical Barrier (Pcb)mentioning

confidence: 89%

“…Some authors recommended that the PCB should be placed at or slightly coronal regarding to the buccal and proximal CEJ to ensure that hydrogen peroxide does not overflow to external root area [11,20]. Also, the PCB must not interfere with the whitening process in the cervical region.…”

Section: Position Of the Protective Cervical Barrier (Pcb)mentioning

confidence: 99%

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Sealing ability of materials used as protective cervical barrier in internal tooth bleaching

Ordóñez-Aguilera¹,

Maenosono²,

Oda³

et al. 2017

RSBO

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Introduction: The use of a protective cervical barrier (PCB) is very well established to perform a safe internal bleaching; however, there is still no consensus on which material has the best sealing ability. Objective: This in vitro study aimed to evaluate the apical and linear sealing of different PCB materials placed during internal bleaching. Material and methods: This study had two study factors: PCB positioning, divided at two levels (cement-enamel junction [CEJ] Response variables were apical and linear sealing obtained through dye penetration and analyzed with a digital microscope. Data were subjected to two-way analysis of variance followed by Tukey test (p<0.05). Results: The main factor for both apical and linear sealing was the type of material (p<0.01), regardless of their position. RC and ZPC presented the worst sealing values (p<0.05). The Spearman

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“…그러나 과산화수소에 비해 표백효과를 얻는데 치료기간이 길어지고 표백효과가 떨어진다고 보고되어 있 다 10,11) . 또 다른 대안으로 표백제를 치수강 내에 적용하기 전에 상피부착부 1mm 상방에 기저제를 위치시켜 표백제가 치주인대로 누출되는 것을 막도록 하고 있으며 [12][13][14][15][16] , 그 외에 pH를 중화시키기 위해서 수산화칼슘 분말을 사용하거나 17) , 과산화수소를 불활성화 시키기 위해 실활치 표백 후에 catalase를 적용하기도 한다 18) . Haywood와 Haymann 19) 은 carbamide peroxide를 사 용한"nightguard vital bleaching" 을 소개하였다.…”

Section: ⅰ 서 론unclassified

Bleaching effect of carbamide peroxide gel on discolored nonvital teeth

Park¹,

Kim²,

Hwang³

et al. 2002

J Korean Acad Conserv Dent

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The bleaching of discolored nonvital teeth is conservative treatment that satisfy the cosmetic desire. The most common method for this treatment, walking bleaching, is using 30% hydrogen peroxide and sodium perborate.Many alternatives are suggested for preventing the external cervical root resorption that is the common complication of the nonvital teeth bleaching with 30% hydrogen peroxide.The same extent of oxidation reactions as that resulted by the bleaching with the application of 30% hydrogen peroxide and sodium perborate can also be acquired more safely by materials that contain 10% carbamide peroxide, used primarily for the bleaching of vital teeth. Therefore, this study was performed to evaluate the efficacy of 10% and 15% carbamide peroxide bleaching gel in nonvatal teeth bleaching.The internal bleaching of intentionally discolored teeth was performed in vitro with 10% carbamide peroxide (Group 1), 15% carbamide peroxide (Group 2), mixture of distilled water and sodium perborate (Group 3), and mixture of 30% hydrogen peroxide and sodium perborate (Group 4). The bleaching materials were refreshed following 3, 6, 9 and 12 days. To evaluate the bleaching effect, the color change of the crowns was measured at 1, 2, 3, 4, 7 and 15 days of bleaching using the colorimeter.The results were as follows : 1. L* and ΔE* values were increased with time in all bleaching agents(p<0.01).2. There was no significant difference in L* and ΔE* value among bleaching agents. 3. ΔE* value higher than 3 was shown after 3 days of bleaching with 10% carbamide peroxide gel, 1 day with 15% carbamide peroxide gel, 4 days with mixture sodium perborate and distilled water and 4 days with mixture sodium perborate and 30% hydrogen peroxide, respectively. These results revealed that the use of 10% and 15% carbamide peroxide bleaching gel in non-vital teeth bleaching is as effective as mixture of distilled water and sodium perborate and mixture of 30% hydrogen peroxide and sodium perborate. Accordingly, carbamide peroxide could be used clinically to bleach discolored non-vital teeth.

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Effect of different protective base materials on hydrogen peroxide leakage during intracoronal bleaching in vitro

Cited by 54 publications

References 17 publications

Microleakage comparison of glass-ionomer and white mineral trioxide aggregate used as a coronal barrier in nonvital bleaching

Microleakage comparison of glass-ionomer and white mineral trioxide aggregate used as a coronal barrier in nonvital bleaching

Sealing ability of materials used as protective cervical barrier in internal tooth bleaching

Bleaching effect of carbamide peroxide gel on discolored nonvital teeth

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