Abstract:Purpose:The aim of the present study was to evaluate the alterations of surface microhardness and wear caused by the sodium bicarbonate jet on bovine enamel and the further remineralizing effect of artificial saliva.Methods:Fifteen enamel samples (4,0mm × 4,0mm) were used, which constituted the groups: no treatment (MI); treatment with sodium bicarbonate jet (MII and DI); treatment with sodium bicarbonate jet and immersion in saliva for one hour (MIII and DII), 24 hours (MIV and DIII) and 7 days (MV and DIV). … Show more
“…Outro possível efeito adverso da utilização periódica do jato de bicabornato seria a remoção de estrutura dentária, diante disto vários trabalhos têm sido realizados para quantificar a estrutura dentária removida em cada sessão de profilaxia profissional com jato de bicarbonato de sódio 1,22,48,49,52,64,65,67,99,110,111 .…”
Section: ________________________________________________ G Gl La Ad unclassified
“…De forma geral, os autores concordam que o a ação do jato é muito pequena sobre o esmalte hígido 1,22,48,49,52,64,65,67,99,110,111 . No entanto, estes estudos avaliaram a superfície imediatamente após o procedimento e ainda existe a dúvida com relação à capacidade protetora do ambiente bucal, pela presença da saliva e\ou flúor, mesmo em se tratando de uma perda de estrutura dentária pela abrasão, por meio da ação mecânica do bicarbonato sob pressão pelo jato de água.…”
Section: ________________________________________________ G Gl La Ad unclassified
“…O papel da saliva na remineralização do esmalte desmineralizado pela erosão ou cárie dentária está bem estabelecido 2,3,50,68,103 , no entanto, só existem estudos in vitro quanto a sua ação em esmalte previamente abrasionado 48,110,111 .…”
Section: ________________________________________________ G Gl La Ad unclassified
“…A composição química do dente humano e bovino é similar 92 48,64,65,100,110,111,112,113,114,123 , nanoindentação com microscopia de força atômica e da perfilometria 48,64,65,100,110,111,112,113,114,123 .…”
Section: ________________________________________________ G Gl La Ad unclassified
“…Muitos autores usaram a microdureza para avaliar a alteração provocada pelos métodos de profilaxia profissional 48,64,65,110,111 . No entanto, a dureza pode levar a interpretações incorretas, principalmente quando se estuda a abrasão.…”
Section: ________________________________________________ G Gl La Ad unclassified
“…Outro possível efeito adverso da utilização periódica do jato de bicabornato seria a remoção de estrutura dentária, diante disto vários trabalhos têm sido realizados para quantificar a estrutura dentária removida em cada sessão de profilaxia profissional com jato de bicarbonato de sódio 1,22,48,49,52,64,65,67,99,110,111 .…”
Section: ________________________________________________ G Gl La Ad unclassified
“…De forma geral, os autores concordam que o a ação do jato é muito pequena sobre o esmalte hígido 1,22,48,49,52,64,65,67,99,110,111 . No entanto, estes estudos avaliaram a superfície imediatamente após o procedimento e ainda existe a dúvida com relação à capacidade protetora do ambiente bucal, pela presença da saliva e\ou flúor, mesmo em se tratando de uma perda de estrutura dentária pela abrasão, por meio da ação mecânica do bicarbonato sob pressão pelo jato de água.…”
Section: ________________________________________________ G Gl La Ad unclassified
“…O papel da saliva na remineralização do esmalte desmineralizado pela erosão ou cárie dentária está bem estabelecido 2,3,50,68,103 , no entanto, só existem estudos in vitro quanto a sua ação em esmalte previamente abrasionado 48,110,111 .…”
Section: ________________________________________________ G Gl La Ad unclassified
“…A composição química do dente humano e bovino é similar 92 48,64,65,100,110,111,112,113,114,123 , nanoindentação com microscopia de força atômica e da perfilometria 48,64,65,100,110,111,112,113,114,123 .…”
Section: ________________________________________________ G Gl La Ad unclassified
“…Muitos autores usaram a microdureza para avaliar a alteração provocada pelos métodos de profilaxia profissional 48,64,65,110,111 . No entanto, a dureza pode levar a interpretações incorretas, principalmente quando se estuda a abrasão.…”
Section: ________________________________________________ G Gl La Ad unclassified
Purpose
The aim of this in vitro study was to quantify and compare changes of the enamel surface caused by periodical use of different air-polishing powders during multibracket therapy.
Methods
Bovine high-gloss polished enamel specimens were air-polished using an AIR-FLOW® Master Piezon with maximum powder and water settings. Each specimen was blasted with sodium bicarbonate (AIR-FLOW® Powder Classic, Electro Medical Systems, Munich, Germany) and erythritol (AIR-FLOW® Powder Plus, Electro Medical Systems). Blasting duration was adapted to the powders’ cleaning efficacy and corresponded to 25 air-polishing treatments in a patient with braces. A spindle apparatus ensured uniform guidance at a distance of 4 mm and a 90° angle. Qualitative and quantitative assessments were performed with the use of low vacuum scanning electron microscopy. Following external filtering and image processing, arithmetical square height (Sa) and root mean square height (Sq) were determined.
Results
Both prophy powders caused a significant increase in enamel roughness. Surfaces blasted with sodium bicarbonate (Sa = 64.35 ± 36.65 nm; Sq = 80.14 ± 44.80 nm) showed significantly (p < 0.001) higher roughness than samples treated with erythritol (Sa = 24.40 ± 7.42 nm; Sq = 30.86 ± 9.30 nm). The observed defects in enamel structure caused by sodium bicarbonate extended across prism boundaries. Prism structure remained intact after air-polishing with erythritol.
Conclusion
Both applied air-polishing powders led to surface alterations. Despite shorter treatment times, sodium bicarbonate was significantly more abrasive than erythritol. Clinicians must compromise between saving time and abrasively removing healthy enamel.
Objectives:This in situ study evaluated the effect of saliva, associated or not with fluoride, on enamel previously submitted to prophylaxis using sodium bicarbonate.Methods:The study was conducted on enamel blocks submitted to in vitro prophylaxis using sodium bicarbonate. The blocks were randomly divided into 2 groups (G1/G2) and mounted on intraoral appliances wore by 10 volunteers. G1 blocks were directly exposed to saliva in situ, while blocks in G2 were exposed to saliva with fluoride (rinsing with 0.2% NaF solution during the initial minute). Enamel alterations were evaluated using surface microhardness and profilometry. Enamel hardness data were analyzed by ANOVA and Tukey tests and surface wear was evaluated using paired t test (P<.05).Results:No significant differences were found between G1 and G2 for enamel hardness and wear. The wear after prophylaxis was not different from the wear after the in situ stage. Baseline mean values of enamel hardness, after prophylaxis and after the in situ stage were 340±16.6, 329±35.7 and 354±37.8 for G1 and 338±15.6, 312±46.3 and 340±21.8 for G2, respectively.Conclusions:It was concluded that saliva alone exhibited a similar effect to saliva associated with fluoride; after 4h of in situ remineralization, there was no recovery in height of the enamel structure that had been lost due to the application of sodium bicarbonate.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.