Effect of 35% Sodium Ascorbate Treatment on Microtensile Bond Strength after Nonvital Bleaching

Hansen, J; Frick, Kenneth J.; Walker, Mary P.

doi:10.1016/j.joen.2014.06.001

Cited by 18 publications

(27 citation statements)

References 16 publications

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“…In another study (24), 35% sodium ascorbate was not able to increase bond strength, which disagrees with the results obtained in this study. Some considerations should be made when comparing these studies.…”

Section: Immediate Bonding To Bleached Dentincontrasting

confidence: 95%

“…The reaction between SA and oxygen into dentin peaks within 1 min and thereafter the reaction reduces considerably (2). Therefore, in this study, sodium ascorbate at both concentrations was applied with two applications for one minute each (11,24). Additionally, the SA in solution form was chosen to conduct this study.…”

Section: Immediate Bonding To Bleached Dentinmentioning

confidence: 99%

“…In the current study, four bleaching sessions were conducted with 3 applications of 15 min each with 7-day intervals between them, simulating the in-office bleaching technique. Instead, Hansen et al (24) employed 35% hydrogen peroxide for 7 consecutive days, simulating the walking-bleaching technique. Since diffusion of the bleaching agent is proportional to the exposure time (3), this fact could explain the divergent results.…”

Section: Immediate Bonding To Bleached Dentinmentioning

confidence: 99%

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Bonding Effectiveness of Universal Adhesive to Intracoronal Bleached Dentin Treated with Sodium Ascorbate

et al. 2016

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This study evaluated the effect of restorative protocol with sodium ascorbate on the shear bond strength (SBS) of a universal adhesive to intracoronal bleached dentin. One hundred-and-twenty bovine dentin fragments were randomly divided into 12 groups (n=10), according to the bleaching procedure (unbleached and bleached) and restorative protocol (no treatment, 10% sodium ascorbate -10SA, 35% sodium ascorbate -35SA and two-step etch-and-rinse -ER or one-step self-etch -SE Scotchbond universal adhesive approaches). Four whitening sessions were performed using 35% hydrogen peroxide. The samples from control groups were kept in relative humidity at 37 °C. Immediately after bleaching procedures, the assigned antioxidant solution was applied on dentin and restorative procedures were performed following either the ER or the SE approach. After 24 h, the specimens were subjected to SBS test. Data (MPa) were analyzed by ANOVA and Tukey's test (α=0.05). Lower SBS values were found for bleached specimens (8.54 MPa) compared with those unbleached (12.13 MPa) (p<0.05). The bond strength of the sodium ascorbate-treated groups was higher than those untreated, regardless of the strategy employed (p<0.05). Groups restored without sodium ascorbate showed lower bond strength values for both ER (8.32 MPa) and SE (8.28 MPa) adhesive strategies. The group treated with 10SA submitted to ER approach (10.14 MPa) was similar to untreated groups (p>0.05). It may be concluded that bond strength of composite resin to intracoronal dentin was affected by restorative protocol and reduced by bleaching.

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Section: Immediate Bonding To Bleached Dentincontrasting

confidence: 95%

Section: Immediate Bonding To Bleached Dentinmentioning

confidence: 99%

Section: Immediate Bonding To Bleached Dentinmentioning

confidence: 99%

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Bonding Effectiveness of Universal Adhesive to Intracoronal Bleached Dentin Treated with Sodium Ascorbate

et al. 2016

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“…The presence of oxygen radicals is responsible for the decrease of the bond strength in newly bleached teeth and the use of SA has been an alternative to overcome this fator [30,31].…”

Section: Sodium Ascorbatementioning

confidence: 99%

“…Evaluating the effectiveness of short-term application of SA 35% to reverse the bleaching effects with HP 35% on the bond strength, it was found that in the short term, is not effective clinically in reversing the effects of bleaching on bond strength [31].…”

Section: Sodium Ascorbatementioning

confidence: 99%

Sodium ascorbate use in bleached teeth

Ferreira

Nascimento

2017

Rev. Odonto Ciênc. (Online)

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OBJECTIVE: Tooth bleeching is a routine intervention in dental office, to be effective in removing stains and browning that compromise the aesthetics of smile. Sometimes there is a need of complementing with composite restorations, but for the use of these requires a certain waiting time. Thus, use of antioxidants such as sodium ascorbate increases the bond strength values due to removal of residual oxygen hinder polymerization. This study examined the use of sodium ascorbate as measure to allow for immediate adhesive restorations after bleaching procedures in vital teeth. METHODS: For that, they consulted national and international studies published between 1973 and 2015 available in Scielo, VHL and PubMed platforms. CONCLUSION: It can be concluded that sodium ascorbate has clinical relevance, but its use should be performed with caution, necessitating further investigation. The fact that in some studies its application introduced effective can not be attributed to factors inherent in the methodology.Key words: Aesthetics; Antioxidants; Tooth bleaching Uso do ascorbato de sódio em dentes clareados RESUMO INTRODUÇÃO: O clareamento dentário é uma intervenção rotineira nos consultórios odontológicos, por ser efetivo na remoção de manchas e escurecimento que comprometem a estética do sorriso. Por vezes há a necessidade de sua complementação com restaurações de resina composta, porém para o emprego destas requer certo tempo de espera. Assim, o uso de antioxidantes como o ascorbato de sódio aumenta os valores de resistência de união devido à remoção do oxigênio residual que atrapalharia sua polimerização. Este estudo verificou o emprego do ascorbato de sódio como medida para permitir a realização de restaurações adesivas imediatas após procedimentos clareadores em dentes vitais. METODOLOGIA: Para tanto, foram consultados trabalhos nacionais e internacionais publicados entre os anos de 1973 e 2015 nos idiomas português e inglês disponíveis nas plataformas Scielo, BVS e PubMed. CONCLUSÃO: Pode-se concluir que o ascorbato de sódio apresenta relevância clínica, mas seu emprego deve ser executado com cautela, necessitando-se de mais pesquisas. O fato de que em alguns estudos sua aplicação não se apresentou efetiva pode ser atribuído a fatores inerentes à metodologia empregada.Palavras-chave: Antioxidantes; Clareamento dentário; Estética 177Rev Odonto Cienc 2016;31(4):176-180 Sodium ascorbate use in bleached teeth | Ferreira et al.

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Dentin bond strength and nanoleakage of the adhesive interface after intracoronal bleaching

Cavalli

Sebold

Shinohara

et al. 2018

Microscopy Res & Technique

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This study evaluated dentin bond strength (BS) and nanoleakage of non- and pre-etched dentin immediately (T ,), 7 days (T ), and 14 days (T ) after bleaching. Bovine incisors (150) were selected and half of them submitted to intrapulpal dentin etching (e). Non- and pre-etched dentin were subjected to the following (n = 15): no bleaching/control (C); 35% carbamide peroxide (CP); 35% hydrogen peroxide (35% HP); 25% hydrogen peroxide (25% HP); and sodium perborate (SP). Bleaching agents were applied to the pulp chamber four times within a 72-h interval. Afterwards, pulp chamber dentin was prepared for the BS test at different evaluation times (n = 5): T , T , and T . Composite blocks were built on pulp chamber and sectioned in slices. Slices were reduced to an hour-glass shape with a cross-sectional area of 0.8 mm and submitted to microtensile BS test. Two additional specimens for each group were prepared for nanoleakage evaluation by transmission electron microscopy (TEM). Results were analyzed by ANOVA (two-way) and Dunnett's test (p < .05). BS decreased immediately after intracoronal bleaching for both sound and pre-etched dentin (p < .05). At T , the BS of non-etched bleached dentin increased for all groups, whereas the pre-etched SPe group presented BS similar to the Ce. Nanoleakage within the hybrid layer was perceptible immediately after bleaching, although a decrease in nanoleakage was observed for all groups at T . Adhesive restorations should be performed 7-14 days after bleaching, according to the bleaching agent used. Intracoronal bleaching should be performed preferably with sodium perborate if previous dentin etching is applied.

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Effect of 35% Sodium Ascorbate Treatment on Microtensile Bond Strength after Nonvital Bleaching

Cited by 18 publications

References 16 publications

Bonding Effectiveness of Universal Adhesive to Intracoronal Bleached Dentin Treated with Sodium Ascorbate

Bonding Effectiveness of Universal Adhesive to Intracoronal Bleached Dentin Treated with Sodium Ascorbate

Sodium ascorbate use in bleached teeth

Dentin bond strength and nanoleakage of the adhesive interface after intracoronal bleaching

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