Durability of the anti-erosive effect of surfaces sealants under erosive abrasive conditions

Abstract

OBJECTIVE: To test the durability of sealants applied for prevention of erosive dentine mineral loss under erosive/abrasive conditions. METHODS: Forty-eight bovine dentine samples doped with (32)P were randomly allocated to four groups (1-4). All samples performed a de-and remineralizations precycling (6 × 1 min erosion in HCl: pH 3.0, mean time and overnight immersion in artificial saliva) for 1 day. Sealing was done as follows; (1) unsealed, (2) Seal Protect, (3) K-0184 (experimental sealer) and (4) OptiBond FL. After sealing, samples were immersed in HCl for 3 h (baseline measurement). Then, the following erosive/abrasive and remineralisations cycling was performed for 8 days: 3 h/day erosion with HCl, 600 brushing strokes/day and storage in artificial saliva for the rest of the day. Sealer permeability was evaluated by assignation of (32)P in the acid used for the erosive attacks. RESULTS: At baseline, the significantly highest dentine loss was observed for the unsealed control group, while the mineral loss was not statistically significantly different between the sealed groups 2 and 3. At all days of the erosive/abrasive and remineralizations cycling and cumulatively the significantly highest mineral loss was observed for group 1, while the significantly lowest mineral loss was observed for the samples sealed with Seal Protect (group 2) and K-0184 (group 3). In all groups, no significant increase in the (32)P release was observed. CONCLUSION: Surface sealants are able to reduce the erosive dentine mineral loss and maintain this erosion-preventing efficacy over the whole duration (simulating 8 month in-vivo) of the erosive/abrasive cycling. Abstract:Objective: To test the durability of sealants applied for prevention of erosive dentine mineral loss under erosive/abrasive conditions.Methods: 48 bovine dentine samples doped with 32 P were randomly allocated to four groups(1-4). All samples performed a de-and remineralisations precycling (6 x 1 min erosion in HCl: pH 3.0, mean time and over night immersion in artificial saliva) for one day. Sealing was done as follows; 1: unsealed, 2: Seal&Protect, 3: K-0184 (experimental sealer) and 4:OptiBond FL. After sealing, samples were immersed in HCl for 3 h (baseline measurement).Then, the following erosive/abrasive and remineralisations cycling was performed for 8 days:3 h/day erosion with HCl, 600 brushing strokes/day and storage in artificial saliva for the rest of the day. Sealer permeability was evaluated by assignation of 32 P in the acid used for the erosive attacks.Results: At baseline, the significantly highest dentine loss was observed for the unsealed control group, while the mineral loss was not statistically significantly different between the sealed groups 2-3.At all days of the erosive/abrasive and remineralisations cycling, and cumulative the significantly highest mineral loss was observed for group 1, while the significantly lowest mineral loss was observed for the samples sealed with Seal&Protect (group 2) and K-0184 (group 3). In all group...

Effects of Bleaching Agents, Neutral Fluoride Gels, and Surface Sealants on Enamel Surface Roughness

“…Historically, pit and fissure sealants in newly erupted teeth have been well known to decrease the prevalence of caries. 25,26 Areas with frequently extensive plaque accumulation adjacent to bonded orthodontic brackets have also been suggested to benefit from extending proper coating materials. 27,28 Using coating material for hypersensitivity, when there is no loss of dental structure, dentinal adhesives, in the form of bonding agents and varnishes, can be indicated.…”

Impact of erosive conditions on tooth-colored restorative materials

“…In vitro-and in situexperiments have proved that resin-based dentin sealants and dental adhesives were able to withstand erosive and erosive/abrasive wear of both enamel and dentin [52][53][54]. A recently published in vitro-study could show that a resinbased surface sealant was able to maintain a dentin protective effect under erosive/abrasive conditions, simulating an 8-month in vivo-situation [55]. Also, even under severe erosive clinical conditions, coating of eroded palatal tooth surfaces with a resin-based adhesive has shown to have the potential to prevent further tooth wear.…”

Penetração de materiais resinosos em lesões de erosão, com e sem condicionamento prévio do esmalte: estudo in vitro

“…Esses materiais correspondem aos selantes, adesivos e mais recentemente o infiltrante. Por meio da formação de uma barreira mecânica sobre o esmalte, eles são capazes de proteger a estrutura dentária contra o desafio erosivo (AZZOPARDI et al, 2001;AZZOPARDI et al, 2004;SUNDARAM et al, 2007a;BARTLETT et al, 2011;WEGEHAUPT et al, 2012;OLIVEIRA, 2013;WEGEHAUPT et al, 2013). Recentemente, a durabilidade desta proteção vem sendo estudada, na qual duas propriedades dos materiais resinosos possuem grande importância, a resistência à degradação no ambiente bucal e sua adesão à estrutura dentária.…”

“…A maioria dos estudos encontrados analisou a durabilidade e proteção à estrutura dentária resultante da aplicação de materiais resinosos frente aos desafios erosivos (AZZOPARDI et al, 2001;AZZOPARDI et al, 2004;SUNDARAM et al, 2007a;BARTLETT et al, 2011;WEGEHAUPT et al, 2012;OLIVEIRA, 2013;WEGEHAUPT et al, 2013). Pouco se sabe sobre a capacidade de penetração desses materiais no interior da lesão de erosão, pois todos os estudos encontrados apenas avaliaram a penetração desses materiais (adesivos e selantes) em lesões de cárie (RODDA, 1983;GOEPFERD;OLBERDING, 1989;RUIZ, 1992;ROBINSON et al, 2001;SHELLIS, 2002;SCHMIDLIN et al, 2004).…”

“…Apesar das diferenças existentes entre as lesões de cárie e erosão (HONÓRIO et al, 2010) comparativamente aos adesivos e selantes, que tem se mostrado como uma alternativa de tratamento para a erosão dentária (AZZOPARDI et al, 2001;AZZOPARDI et al, 2004;SUNDARAM et al, 2007a;BARTLETT et al, 2011;WEGEHAUPT et al, 2012;OLIVEIRA, 2013;WEGEHAUPT et al, 2013). No entanto, para que haja penetração do infiltrante no interior da lesão cariosa, o material apresenta um novo procedimento de preparo da superfície com ácido clorídrico para remover a camada superficial mineralizada das lesões cariosas PARIS, 2008a) e não se sabe se este procedimento poderia ser capaz de remover a estrutura amolecida das lesões iniciais de erosão.…”