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Stomatos ; 17(32): 4-14, jan.-jun. 2011. ilus
Article in Portuguese | LILACS | ID: lil-651916

ABSTRACT

O objetivo deste estudo foi avaliar a topograa da superfície das cerâmicas Noritake, IPS e.max e Cercon quando empregado o jateamento com óxido de alumínio ou o condicionamento com ácido uorídrico. Foram confeccionadas seis amostras de cada cerâmica (10mm x 10mm x 0,5mm), sendo divididas em três grupos: Grupo 1: sem tratamento de superfície (controle); Grupo 2: jateamento com óxido de alumínio de 50 µm; Grupo 3: ácido uorídrico a 10%. As amostras foram metalizadas e observadas em microscópio eletrônico de varredura. O ácido uorídrico a 10% aumentou a irregularidade supercial das cerâmicas Noritake e IPS e.max, mas não alterou a topograa supercial da cerâmica Cercon. O jateamento com óxido de alumínio aumentou a irregularidade supercial das cerâmicas Noritake, IPS e.max e Cercon. Concluiu-se que o ácido uorídrico foi efetivo somente para as cerâmicas Noritake e IPS e.max, e o jateamento foi efetivo para as três cerâmicas.


The purpose of this study was to evaluate the surface topography of Noritake, IPS e.max and Cercon ceramics after treatment with either airborne aluminum oxide particle abrasion or hydrouoric acid etching. Six specimens of each ceramic (10mm x 10mm x 0,5mm) were fabricated and randomly divided into three groups: Group 1: without surface treatment (control); Group 2: airborne particle abrasion with 50-µm aluminum oxide; Group 3: 10% hydrouoric acid etching. The specimens were gold coated and examined using scanning electron microscopy. The 10% hydrouoric acid increased the surface irregularities of Noritake and IPS e.max ceramics, but did not change the surface topography of Cercon ceramic. Airborne particle abrasion with aluminum oxide increased the surface irregularities of Noritake, IPS e.max and Cercon ceramics. It was concluded that hydrouoric acid was effective only for Noritake and IPS e.max ceramics, and airborne particle abrasion was effective for the three ceramics.


Subject(s)
Acids, Noncarboxylic , Air Abrasion, Dental , Ceramics , Biomedical and Dental Materials , Hydrofluoric Acid , Dentistry
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