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Effect of Er:Yag laser on dentin demineralization around restorations.
Chinelatti, Michelle Alexandra; Rocha, Cristiane Tomaz; Colucci, Vivian; Serra, Mônica Campos; Rodrigues-Júnior, Antonio Luiz; Corona, Silmara Aparecida Milori.
Afiliación
  • Chinelatti MA; Department of Dental Materials and Prosthodontics, Ribeirão Preto School of Dentistry, University of São Paulo, Av. do Café, s/n°, Ribeirão Preto, São Paulo, 14040-904, Brazil. michinelatti@hotmail.com.
  • Rocha CT; Department of Pediatric, Preventive and Social Dentistry, Ribeirão Preto School of Dentistry, University of São Paulo, Av. do Café, s/n., Ribeirão Preto, 14040-904, São Paulo, Brazil.
  • Colucci V; Dental School, University of Ribeirão Preto, Av. Costábile Romano, 2201, Ribeirão Preto, São Paulo, 14096-000, Brazil.
  • Serra MC; Department of Restorative Dentistry, Ribeirão Preto School of Dentistry, University of São Paulo, Av. do Café, s/n°, Ribeirão Preto, São Paulo, 14040-904, Brazil.
  • Rodrigues-Júnior AL; Department of Social Medicine, Ribeirão Preto School of Medicine, University of São Paulo, Av. Bandeirantes, 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil.
  • Corona SA; Department of Restorative Dentistry, Ribeirão Preto School of Dentistry, University of São Paulo, Av. do Café, s/n°, Ribeirão Preto, São Paulo, 14040-904, Brazil.
Lasers Med Sci ; 32(2): 413-418, 2017 Feb.
Article en En | MEDLINE | ID: mdl-28054260
The aim of this study was to evaluate the effect of cavity preparation with Er:YAG laser on dentin adjacent to restorations submitted to cariogenic challenge in situ, by subsuperficial microhardness analysis. Bovine incisors were sectioned, flattened, and polished, resulting in 40 dentin slabs. The slabs were randomly assigned to four groups (n = 10), according to the cavity preparation method: I-high-speed handpiece (control); II-Er:YAG laser (160 mJ; 3 Hz); III-Er:YAG laser (260 mJ; 3 Hz); IV-Er:YAG laser (300 mJ; 3Hz). Cavities were restored with composite resin, and the specimens were fixed in intra-oral appliances, which were worn by 10 volunteers for 14 days for simulating cariogenic challenge in situ. During the experimental period, 20% sucrose solution was dripped over each specimen 6 times a day. Samples were removed, sectioned, and examined for subsuperficial Knoop microhardness at 100, 200, and 300 µm from the restoration and at 30 µm from dentin surface. Split-plot analysis of variance showed no significant difference among the cavity preparation techniques (p = 0.1129), among distances (p = 0.9030), as well as no difference in the interaction between the main factors (p = 0.7338). It was concluded that the cavity preparation with Er:YAG laser did not influence on dentin microhardness submitted to cariogenic challenge in situ.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Desmineralización Dental / Restauración Dental Permanente / Dentina Límite: Adult / Animals / Humans Idioma: En Revista: Lasers Med Sci Asunto de la revista: BIOTECNOLOGIA / RADIOLOGIA Año: 2017 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Desmineralización Dental / Restauración Dental Permanente / Dentina Límite: Adult / Animals / Humans Idioma: En Revista: Lasers Med Sci Asunto de la revista: BIOTECNOLOGIA / RADIOLOGIA Año: 2017 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Reino Unido