Erosive cola-based drinks affect the bonding to enamel surface: an in vitro study

Abstract

ObjectiveThis study aimed to assess the impact of in vitro erosion provoked by different cola-based drinks (Coke types), associated or not with toothbrushing, to bonding to enamel.Material and MethodsFifty-six bovine enamel specimens were prepared and randomly assigned into seven groups (N=8): C- Control (neither eroded nor abraded), ERO-RC: 3x/1-minute immersion in Regular Coke (RC), ERO-LC: 3x/1-minute immersion in Light Coke (LC), ERO-ZC: 3x/1-minute immersion in Zero Coke (ZC) and three other eroded groups, subsequently abraded for 1-minute toothbrushing (EROAB-RC, EROAB-LC and EROAB-ZC, respectively). After challenges, they were stored overnight in artificial saliva for a total of 24 hours and restored with Adper Single Bond 2/Filtek Z350. Buildup coronal surfaces were cut in 1 mm2 -specimens and subjected to a microtensile test. Data were statistically analyzed by two-way ANOVA/Bonferroni tests (α=0.05). Failure modes were assessed by optical microscopy (X40). The interface of the restorations were observed using Confocal Laser Scanning Microscopy (CLSM).ResultsAll tested cola-based drinks significantly reduced the bond strength, which was also observed in the analyses of interfaces. Toothbrushing did not have any impact on the bond strength. CLSM showed that except for Zero Coke, all eroded specimens resulted in irregular hybrid layer formation.ConclusionsAll cola-based drinks reduced the bond strength. Different patterns of hybrid layers were obtained revealing their impact, except for ZC.

Evaluation of Shear Bond Strength of Resin Composite to Enamel Surface of Permanent Teeth Eroded by Two Carbonated Beverages (In Vitro Study)

“…The results of the present study was supported by Casas-Apayco et al (26) who concluded that all Cola-based drinks reduced the bond strength except for Zero Coke (ZC) as ZC has lower titrable acidity than other tested Cola based drinks. This less-erosive potential was attributed to the presence of the amino acid phenylalanine, which is provided by the hydrolysis of aspartame (artificial non-saccharide sweetener) in the presence of saliva.…”

“…2). Erosive procedure (26) Composition and chemical characteristics of each immersion media are presented in (Table 1) (27,28). Each tooth was immersed in the corresponding immersion (erosive) challenge medium three times, one minute each, with an interval of eight hours.…”

“…A fresh erosive medium was used each time for each tooth which was then stored in artificial saliva separately, artificial saliva was changed every 8 hours for a total of twenty four hours between the erosive challenges. Restorative procedure (26) After the erosive challenge cycle, each tooth was carefully cleaned with distilled water. The crown of each tooth was separated from the root 2mm below the cementum-enamel junction with a water-cooled, low-speed diamond disc (19).…”

Use of new scratch test and tensile test for evaluation of bond strength of selfadhesive flowable resin composite for repair of artificial tooth erosion

“…These changes indicate that demineralized enamel is different from sound enamel, which may lead to an unsatisfactory etching pattern and infiltration of monomers, resulting in reduced bond strength 21) . Casas et al 25) stated that immersion of a tooth in Cola decreases the bond strength between enamel and resin. On the other hand, acid-eroded enamel has a higher bond strength than that of normal enamel 26) .…”

Efeito do desafio erosivo nas propriedades e na estabilidade de união de materiais restauradores ao esmalte e dentina de dentes decíduos

“…Especialmente em Odontopediatria, os inúmeros estudos a cerca da prevalência de lesões não-cariosas associada com uma possível maior severidade em dentes decíduos (Al-Majed et al, 2002;Kazoullis et al, 2007;Rios et al, 2007;Kreulen et al, 2010;Murakami et al, 2011;Mantonanaki et al, 2013;Habib et al, 2013), têm despertado o interesse de pesquisas objetivando a melhor compreensão do mecanismo de formação dessas lesões e de seus possíveis tratamentos (Cruz et al, 2012;Zimmerli et al, 2012;Flury et al, 2013;Lenzi et al, 2013;Casas-Apayco et al, 2014).…”