Journal article
Enamel surface loss after erosive and abrasive cycling with different periods of immersion in human saliva.
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Lopes RM
Department of Restorative Dentistry, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes, 2227 Cidade Universitária, São Paulo, 05508-000, SP, Brazil. Electronic address: quelmlopes@gmail.com.
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da Silva JSA
Department of Restorative Dentistry, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes, 2227 Cidade Universitária, São Paulo, 05508-000, SP, Brazil. Electronic address: juliana.ssant@gmail.com.
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João-Souza SH
Department of Restorative, Preventive and Pediatric Dentistry, University of Bern, Freiburgstrasse 7 CH-3010, Bern, Switzerland. Electronic address: samira.joaosouza@gmail.com.
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Maximiano V
Department of Restorative Dentistry, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes, 2227 Cidade Universitária, São Paulo, 05508-000, SP, Brazil. Electronic address: s.vinimax@hotmail.com.
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Machado AC
Department of Restorative Dentistry, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes, 2227 Cidade Universitária, São Paulo, 05508-000, SP, Brazil. Electronic address: alana__machado@hotmail.com.
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Scaramucci T
Department of Restorative Dentistry, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes, 2227 Cidade Universitária, São Paulo, 05508-000, SP, Brazil. Electronic address: tais.sca@usp.br.
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Aranha ACC
Department of Restorative Dentistry, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes, 2227 Cidade Universitária, São Paulo, 05508-000, SP, Brazil. Electronic address: acca@usp.br.
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Published in:
- Archives of oral biology. - 2020
English
OBJECTIVE
This in vitro study aimed to evaluate different periods of exposure to clarified human saliva for the ability to protect enamel against erosive tooth wear.
METHODS
For this purpose, sixty specimens (4 × 4 × 1.5 mm) were prepared from third human molars. For all groups, the period before abrasion was performed by remineralisation with human saliva (except in G1). The specimens were randomly divided into six groups (n = 10) according to the different remineralisation times of exposure to clarified human saliva: no exposure to saliva (G1) and 30 min (G2), 60 min (G3), 90 min (G4), 120 min (G5), and 240 min (G6) of exposure to human saliva. A 5-day cycling was performed with 5 min of erosion (1% citric acid; pH 2.3), 4x/day. After the first and last erosive episodes, the abrasion challenge was performed with slurry of fluoride toothpaste (1450 ppm F-, as sodium monofluorophosphate) plus human saliva (1:3), with an electric toothbrush (15 s, with a total of 120 s of slurry immersion). Surface loss (SL) was determined using an optical profilometer (n = 10) and for qualitative analysis, environmental scanning electron microscopy (ESEM) was performed (n = 3). The SL data were statistically analysed by one-way analysis of variance (α = 0.05).
RESULTS
No significant differences were detected among the groups for SL (p > 0.05), and ESEM showed similar aspects of eroded enamel.
CONCLUSIONS
The period of in vitro exposure to clarified human saliva was not able to protect against enamel erosion.
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Language
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Open access status
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closed
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Identifiers
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Persistent URL
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https://sonar.ch/global/documents/141132
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