Comparative SEM evaluation of penetration of adhesive systems in human dentin with a non-rinse conditioner and a self-etching primer



Document title: Comparative SEM evaluation of penetration of adhesive systems in human dentin with a non-rinse conditioner and a self-etching primer
Journal: Brazilian dental journal
Database: PERIÓDICA
System number: 000290269
ISSN: 0103-6440
Authors: 1

Institutions: 1Universidade do Estado do Rio de Janeiro, Faculdade de Odontologia, Rio de Janeiro. Brasil
Year:
Volumen: 15
Number: 1
Pages: 19-25
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Experimental
English abstract The purpose of this study was to compare the effect of a self-etching primer and a non-rinse conditioner with the effect of a conventional adhesive system on the penetration depth in dentin of human teeth, using scanning electronic microscopy (SEM). Fifteen human third molar teeth were sectioned into 2 pieces. All pieces were flattened with grade 600 to 1200 silicon carbide paper and divided into 6 groups: group 1 - Prime & Bond NT (NT), negative control; group 2 - 37% phosphoric acid + Prime & Bond NT (PANT), positive control; group 3 - Non-rinse Conditioner (NRC) + Prime & Bond NT (NRCNT); group 4 - NRC + Prime & Bond 2.1 (NRCPB); group 5 - NRC + Scotchbond MP (NRCSB); group 6 - Prompt L-Pop (PLP). All teeth were covered with Dyract AP. The tooth fragments were decalcified, and its resin replicas were evaluated by SEM by three previously standardized examiners. The penetration was scored from 0 (no penetration) to 3 (maximum penetration). The Kruskal-Wallis and Mann-Whitney U tests (p<0.05) showed three statistically homogeneous groups: {NT, NRCPB, NRCSB and PLP}, {NRCNT} and {PANT}. The authors concluded that the self-etching primer and the non-rinse conditioner provide a lower penetration depth in human tooth dentin than the conventional adhesive system
Portuguese abstract O objetivo desse estudo foi comparar o efeito de um adesivo autocondicionante e de um ácido não lavável quanto a profundidade de penetração na dentina de dentes humanos, através da observação em Microscopia Eletrônica de Varredura (MEV). Quinze terceiros molares tiveram a dentina exposta, cortando-se a face oclusal, planificados com lixa d'água 600, cortados transversalmente e distribuídos em 6 grupos de 5 cada: grupo 1 - Prime Bond NT (NT), controle negativo; grupo 2 - ácido fosfórico 37% + Prime Bond NT (PANT), controle positivo; grupo 3 - Non-Rinse Conditioner (NRC) + Prime Bond NT (NRCNT); grupo 4 - NRC + Prime Bond 2.1 (NRCPB); grupo 5 - NRC + Scotch Bond MP (NRCSB) e grupo 6 - Prompt L-Pop (PLP). Todos foram recobertos com Dyract AP. Os fragmentos dentários foram descalcificados com HCl a 10% e NaOH a 5% e as réplicas em resina examinadas em MEV. Três examinadores calibrados avaliaram as fotomicrografias e atribuíram escores de 0 = sem penetração a 3 = penetração máxima. Os testes de Kruskal-Wallis e Mann-Whitney (P<0,05) evidenciaram três grupos homogêneos {NT, NRCPB, NRCSB e PLP}; {NRCNT} e {PANT}. Os autores concluíram que o sistema adesivo autocondicionante e o ácido não lavável apresentaram menor penetração em dentina do que o sistema adesivo convencional
Disciplines: Medicina
Keyword: Medicina experimental,
Odontología,
Sistemas adhesivos,
Dentina,
Resinas,
Interfaz,
Microscopía electrónica de barrido
Keyword: Medicine,
Dentistry,
Experimental medicine,
Adhesive systems,
Dentin,
Resins,
Interface,
Scanning electron microscopy
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