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Type: Artigo de periódico
Title: Marginal and internal adaptation of composite restorations using a resin liner on deproteinized substrate
Author: Correr, GM
Alonso, RCB
Puppin-Rontani, RM
Correr-Sobrinho, L
Sinhoreti, MAC
Abstract: Objective. The purpose of this study was to evaluate the use of resin liner on deproteinized substrate on marginal and internal adaptation of composite restorations. Material and methods. Twenty-four recently extracted 3rd molars were selected. The crowns were sectioned in a mesio-distal direction, and the specimens were ground to expose a flat enamel area of at least 6 mm in diameter. Cavities were prepared on the central area of flattened surfaces. The specimens were randomly assigned into four groups (n = 12): SB - 1. Acid etch, 2. Single bond application (SB); NaOCl/SB - 1. acid etch, 2. 10% sodium hypochlorite solution application for 60 s (NaOCl), 3. SB; SB/PL - 1. acid etch, 2. SB, 3. protect liner F (PL); NaOCl/SB/ PL - 1. acid etch, 2. NaOCl, 3. SB, 4. PL. All cavities were restored with Filtek Z250 and polished. The outer and internal margins were stained using Caries Detector (R) (Kuraray), observed under the stereomicroscope, and transferred to a computer measurement program. The length of the gap was expressed as a percentage of the total length of the margins observed. Data ( internal adaptation) were submitted to ANOVA and Tukey's test. Results. There were no gaps at enamel outer margins in any specimen of any group. There was no statistically significant difference in internal adaptation between SB (18%) and NaOCl/ SB (18%). NaOCl/ SB/PL showed the worst internal adaptation (21%), with the higher percentage of internal gaps, statistically differing from SB/PL, which showed the best internal adaptation (12%). Conclusions. Resin liner can effectively enhance internal adaptation on demineralized dentin. However, on demineralized and deproteinized dentin it affects the internal adaptation of composite restorations negatively.
Subject: composites
dental restorations
resin liner
sodium hypochlorite
Country: Noruega
Editor: Taylor & Francis As
Citation: Acta Odontologica Scandinavica. Taylor & Francis As, v. 63, n. 4, n. 227, n. 232, 2005.
Rights: fechado
Identifier DOI: 10.1080/00016350510019955
Date Issue: 2005
Appears in Collections:Unicamp - Artigos e Outros Documentos

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