Microhardness of acid-treated and resin infiltrated human dentine (2005)
- Autores:
- Autor USP: CARVALHO, RICARDO MARINS DE - FOB
- Unidade: FOB
- DOI: 10.1016/j.jdent.2004.10.007
- Assunto: DENTINA
- Idioma: Inglês
- Resumo: Objective: The aim is to determine if superficial or deep dentine microhardness (MH) is affected by different chemical dentine pre-treatments performed for resin bonding. Methods: Dentine discs of superficial (SD) and deep dentine (DD) were obtained by transversally sectioning the crowns of human third molars. Knoop MH was measured after different treatments: (1) polished up to 4000 grit, (2) polished and etched (37% ortophosphoric acid for 15 s), (3) resin (Single Bond -SB-) infiltrated dentine after acid etching, (4) polished, etched and treated with 5% NaOCl for 2 min, (5) resin infiltrated (SB) after etching and NaOCl treatment. For resin infiltrated surfaces care was taken in order to remove the excess adhesive layer, and obtain infiltrated dentine, by measuring thickness of the sample before resin infiltration and polishing after resin infiltration until obtaining the initial thickness of the sample. Indentations (n=20) were performed on moist surfaces with a standard Knoop MH tester (20 g, 5 s). Data were expressed in Knoop Hardness Numbers (KHN) and analysed by ANOVA and multiple comparisons (P<0.05). Results: Dentine KHN decreased on both SD and DD after acid etching. NaOCl treatment after acid etching did not affect MH on SD, but KHN of DD was lowered. Resin infiltration increased KHN but did not recover the initial MH values in both SD and DD. Conclusions: Treating dentine with either H3PO4 or NaOCl caused marked reduction of its surfacehardness and subsequent resin infiltration was not capable to restore it
- Imprenta:
- Fonte:
- Título do periódico: Journal of Dentistry
- ISSN: 0300-5712
- Volume/Número/Paginação/Ano: v. 33, n. 4, p. 349-354, Apr. 2005
- Este periódico é de assinatura
- Este artigo NÃO é de acesso aberto
- Cor do Acesso Aberto: closed
-
ABNT
TOLEDANO, Manuel et al. Microhardness of acid-treated and resin infiltrated human dentine. Journal of Dentistry, v. 33, n. 4, p. 349-354, 2005Tradução . . Disponível em: http://www.intl.elsevierhealth.com/journals/jden/. Acesso em: 18 set. 2024. -
APA
Toledano, M., Osorio, R., Osorio, E., Prati, C., & Carvalho, R. M. de. (2005). Microhardness of acid-treated and resin infiltrated human dentine. Journal of Dentistry, 33( 4), 349-354. doi:10.1016/j.jdent.2004.10.007 -
NLM
Toledano M, Osorio R, Osorio E, Prati C, Carvalho RM de. Microhardness of acid-treated and resin infiltrated human dentine [Internet]. Journal of Dentistry. 2005 ; 33( 4): 349-354.[citado 2024 set. 18 ] Available from: http://www.intl.elsevierhealth.com/journals/jden/ -
Vancouver
Toledano M, Osorio R, Osorio E, Prati C, Carvalho RM de. Microhardness of acid-treated and resin infiltrated human dentine [Internet]. Journal of Dentistry. 2005 ; 33( 4): 349-354.[citado 2024 set. 18 ] Available from: http://www.intl.elsevierhealth.com/journals/jden/ - Selantes de fossulas e fissulas
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Informações sobre o DOI: 10.1016/j.jdent.2004.10.007 (Fonte: oaDOI API)
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