Adhesion of Composite Resin to Bleached and Unbleached Bovine Enamel

Titley, K.C.; Torneck, Calvin D.; Smith, Dennis C.; Adibfar, Alexander

doi:10.1177/00220345880670121601

Cited by 101 publications

(106 citation statements)

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“…21 However, while bovine teeth do not lead to results that are identical with those obtained from human teeth, they produce results that are comparable and certainly useful in evaluating the influence of various treatments on enamel bond strengths. 9 Bovine enamel was used in the current study, both because large numbers of human enamel specimens were difficult to obtain and the current study determined the efficient time periods for the application of an antioxidant gel.…”

Section: Discussionmentioning

confidence: 99%

“…3 In addition, hydrogen and carbamide peroxide, which are commonly used bleaching agents, affect the bonding of enamel and dentin tissue when restorations are applied directly after bleaching treatment. [4][5][6][7][8][9][10][11] Delays of one day, 4,12 three-to-seven days 5,13 and three weeks 11,14 following the bleaching procedure are recommended to enable the enamel to return to normal conditions, activating normal bond strengths and allowing the reestablishment of esthetics.…”

Section: Introductionmentioning

confidence: 99%

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Reversal of Compromised Bonding in Bleached Enamel Using Antioxidant Gel

Kaya¹,

Türkün²,

Arici³

2008

Operative Dentistry

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Dental bond strength is significantly reduced when bonding is performed immediately after bleaching treatments. It has also been reported that the application of an antioxidant after bleaching treatment improves the adhesive bond strength of oxidized enamel tissue. The application of an antioxidant in gel form by the patient makes the application process easier and shortens time spent in the clinic. SUMMARYMany studies have shown a considerable reduction in the enamel bond strength of resin composite restorations when the bonding procedure is carried out immediately after bleaching. These studies claim that a certain waiting period is needed prior to performing the restoration in order to attain the original bond strength values. This study determined the most effective time duration for the application of sodium ascorbate prepared in gel form. The labial surfaces of 70 bovine incisors were polished with 600-grit silicon carbide paper on a water-irrigated metallurgical polishing wheel. The specimens were randomly divided into seven groups: 1) bleaching (10% Rembrandt Xtra-Comfort +) immersed in artificial saliva for seven days, 2) bonded immediately after bleaching, 3) bleaching + 10% sodium ascorbate (SA) gel for 10 minutes, 4) bleaching + 10% SA gel for 60 minutes, 5) bleaching + 10% SA gel for 120 minutes, 6) bleaching + 10% SA gel for 240 minutes and 7) bleaching + 10% SA gel for 480 minutes. After preparation, a standardshaped resin composite was applied to all specimens. The teeth were stored in distilled water at 37˚C for 24 hours and a universal testing machine determined their shear bond strength. The data were evaluated using ANOVA and Tukey tests. Antioxidant gel proved to be effective for increasing the shear bond strength of the resin composite to enamel. For maximum effectiveness, antioxidant gel should be applied to enamel for

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reversal of Compromised Bonding in Bleached Enamel Using Antioxidant Gel

Kaya¹,

Türkün²,

Arici³

2008

Operative Dentistry

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“…Although bovine teeth are commonly used, some concerns about the application of data obtained from bovine to human teeth have been raised, as their chemistry and structure are not fully identical [30,31] and inconsistent data exists for microleakage of bovine dentine compared to that of human dentine [32,33]. These different anatomical and morphological aspects should be considered.…”

Section: Discussionmentioning

confidence: 99%

Endodontic drug delivery for root surface disinfection: a laboratory feasibility evaluation

et al. 2015

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OBJECTIVES This study aims to assess the potential of a mixture of three antibiotics (TreVitaMix, TVM) as an intracanal dressing to disinfect the outer root surface by applying a new in vitro model. MATERIALS AND METHODS Fifty freshly extracted bovine roots were endodontically treated. Forty samples were then thoroughly scaled, mounted to petri dishes, gas sterilized, and randomly allocated to four groups (n = 10/group) according to their intracanal medication: sterile saline (NaCl; control, A); the TVM carrier material alone, i.e., propylene glycol (PG; B); TVM (C); and calcium hydroxide (D). In an additional group (E), the cementum was not removed and TVM was placed. Petri dishes were filled with Fastidious Anaerobe Agar, inoculated with Fusobacterium nucleatum suspension and then anaerobically incubated during 48-h intervals at 37°C up to 192 h. Inhibition zones around the roots were then measured after each incubation period (mm(2)). RESULTS Only teeth inoculated with the TVM dressing showed inhibition at all time points, whereas the other treatments showed no peri-radicular growing inhibition. Presence of cementum had no negative effect on disinfection (p = 0.9320). CONCLUSION TVM was able to penetrate through the dentine and inhibit the bacterial growth of F. nucleatum up to 192 h. CLINICAL RELEVANCE TVM might have the potential to sustainably disinfect the outer root surface in perio-endo lesions and serve as an adjunctive antimicrobial agent. Declaration of interests:The authors declare they have no conflicts of interest. AbstractObjectives To assess the potential of a mixture of three antibiotics (TreVitaMix, TVM) as an intracanal dressing to disinfect the outer root surface applying a new in vitro model. Materials and MethodsFifty freshly extracted bovine roots were endodontically treated. Forty samples were then thoroughly scaled, mounted to petri dishes, gas sterilized and randomly allocated to four groups (n=10/group) according their intracanal medication: Sterile saline NaCl (control, A), the TVM carrier material alone, i.e. propylene glycol (PG; B), TVM (C) and calcium hydroxide (D). In an additional group (E), the cementum was not removed and TVM was placed. Petri dishes were filled with Fastidiuos Anaerobe Agar, inoculated with F. nucleatum suspension and then anaerobically incubated during 48 h intervals at 37°C up to 192 h. Inhibition zones around the roots were then measured after each incubation period (mm 2 ).Results Only teeth inoculated with the TVM dressing showed inhibition at all time points, whereas the other treatments showed no peri-radicular growing inhibition. Presence of cementum had no negative effect on the disinfection (p = 0.9320).Conclusion TVM was able to penetrate through dentine and inhibit the bacterial growth of F. nucleatum up to 192 h.Clinical relevance TVM might have the potential to sustainably disinfect the outer root surface in perio-endo lesions and serve as an adjunctive antimicrobial agent.

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“…As adhesive restorative procedures require the formation of the hybrid layer of enamel and dentin, the contact of the monomers with free radicals remaining prevent or hinder the polymerization reaction, compromising the clinical performance of restauration [18].…”

Section: Interference Of Residual Oxygen In the Adhesionmentioning

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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Adhesion of Composite Resin to Bleached and Unbleached Bovine Enamel

Cited by 101 publications

References 3 publications

Reversal of Compromised Bonding in Bleached Enamel Using Antioxidant Gel

Reversal of Compromised Bonding in Bleached Enamel Using Antioxidant Gel

Endodontic drug delivery for root surface disinfection: a laboratory feasibility evaluation

Sodium ascorbate use in bleached teeth

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