Eroded enamel rehardening using two intraoral appliances designs in different times of salivary exposure
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Eroded enamel rehardening using two intraoral appliances designs in different times of salivary exposure

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Eroded enamel rehardening using two intraoral appliances designs in different times of salivary exposure

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dc.contributor.author Mendonça, Fernanda-Lyrio es
dc.contributor.author Jordão, Maisa-Camillo es
dc.contributor.author Val, Poliana-Pacífico es
dc.contributor.author Alencar, Catarina Ribeiro Barros de es
dc.contributor.author Bassoto, Marcela-de Azevedo-Garcia es
dc.contributor.author Honório, Heitor-Marques es
dc.contributor.author Magalhães, Ana-Carolina es
dc.contributor.author Buzalaf Marília, Afonso Rabel es
dc.contributor.author da Silva, Thiago-Cruvinel es
dc.contributor.author Rios, Daniela es
dc.date.accessioned 2020-02-05T08:58:58Z
dc.date.available 2020-02-05T08:58:58Z
dc.date.issued 2019 es
dc.identifier.uri https://hdl.handle.net/10550/72898
dc.description.abstract The aim of this study was evaluated the eroded enamel rehardening potential using upper palatal and lower buccal removable appliances in different times of salivary exposure (30 min, 1h, 2h, 12h) after a single erosive challenge event. After initial surface hardness evaluation, bovine enamel blocks were eroded in vitro (0.01 M hydrochloric acid, pH 2.3, 30 seconds), selected (n = 160) and randomly assigned to the two appliance designs and twenty volunteers. Four enamel blocks were inserted in each removable appliance. On the in situ phase, the volunteers were instructed to use the upper palatal and lower buccal appliances simultaneously for 12 nonconsecutive hours. After each predetermined period of time of salivary exposure, the enamel blocks were removed from the appliances for immediate evaluation of surface hardness, enabling percentage of surface hardness recovery calculation (%SHR). The data were analyzed using two-way ANOVA and Tukey?s test (?=5%). The results showed no difference in the degree of enamel rehardening by the upper palatal or lower buccal appliances (p >0.0001). Regarding the time of use of the appliances, it was demonstrated that 30 minutes (upper = 21.12%, lower = 19.84%) and 1 hour (upper = 35.69%, lower = 30.50%) promoted lower hardness recovery than two hours (upper = 44.65%, lower 40.80%) of salivary exposure (p<0.0001). The use of 12 hours (upper = 49.33%, lower = 49.00%), including the sleeping time of the volunteers did not increase the %SHR. The location of the appliance does not influence the re-hardening ability of saliva and the use of intraoral appliances for 2 hours seems to be appropriate for partial rehardening of the softened enamel surface. es
dc.source Mendonça, Fernanda-Lyrio ; Jordão, Maisa-Camillo ; Val, Poliana-Pacífico ; Alencar, Catarina Ribeiro Barros de ; Bassoto, Marcela-de Azevedo-Garcia ; Honório, Heitor-Marques ; Magalhães, Ana-Carolina ; Buzalaf Marília, Afonso Rabel ; da Silva, Thiago-Cruvinel ; Rios, Daniela. Eroded enamel rehardening using two intraoral appliances designs in different times of salivary exposure. En: Journal of Clinical and Experimental Dentistry, 11 12 2019: 1127-1132 es
dc.title Eroded enamel rehardening using two intraoral appliances designs in different times of salivary exposure es
dc.type info:eu-repo/semantics/article en
dc.type info:eu-repo/semantics/publishedVersion en
dc.subject.unesco UNESCO::CIENCIAS MÉDICAS es
dc.identifier.doi 10.4317/jced.56222 es

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