In vitro microleakage of packable composites in Class II restorations (2004)
- Authors:
- USP affiliated author: GRANDE, ROSA HELENA MIRANDA - FO
- School: FO
- Subjects: ESMALTE DENTÁRIO; CEMENTO DENTÁRIO; POLIMERIZAÇÃO; RESINAS COMPOSTAS
- Language: Inglês
- Abstract: OBJECTIVES: To evaluate the microleakage in Class II resin restorations at different margins and the polymerization shrinkage of the composites used. METHOD AND MATERIALS: Four standardized Class II (3 x 5 x 2 mm) cavities were prepared in 32 teeth. The sample had the gingival margin either 1 mm below or above the cementoenamel junction. Teeth were divided and restored according to the following protocols: (1) Single Bond + P60; (2) Prime & Bond NT + Surefil; (3) Bond-1 + Alert; and (4) Prime & Bond 2.1 + TPH. After 7 days, the specimens were thermocycled (500 cycles between 5 to 55 degrees C with a 15-second dwell time), immersed in 0.5% methylene blue for 24 hours, sectioned, and evaluated (both surfaces) at the gingival margin by two examiners, using a 0 to 3 marginal infiltration score system. The polymerization shrinkage of the composites (n = 6) was evaluated by the disk deflective method. Microleakage data was evaluated by nonparametric repeated measures ANOVA. The percentage of polymerization shrinkage was evaluated by ANOVA and Tukey's test. RESULTS: Only protocol 3 showed a significant difference between enamel and cementum margin. No difference was detected among the protocols in the enamel margin. Only protocol 1 provided a good seal in the cementum margin. All packable composites showed lower polymerization shrinkage than the hybrid tested. CONCLUSION: All protocols are able to prevent dye penetration in enamel margins; however, protocol 1 ispreferable to reduce the microleakage in the cementum margin. The packable composites showed lower polymerization shrinkage compared to the hybrid resin
- Imprenta:
- Place of publication: Massachusetts
- Date published: 2004
- Source:
- Título do periódico: Quintessence Internacional
- ISSN: 0033-6572
- Volume/Número/Paginação/Ano: v. 35, n. 1, p.29-34, jan. 2004
-
ABNT
LOGUERCIO, Alessandro Dourado; BAUER, José Roberto de Oliveira; REIS, Alessandra; GRANDE, Rosa Helena Miranda. In vitro microleakage of packable composites in Class II restorations. Quintessence Internacional, Massachusetts, v. 35, n. ja 2004, p. 29-34, 2004. -
APA
Loguercio, A. D., Bauer, J. R. de O., Reis, A., & Grande, R. H. M. (2004). In vitro microleakage of packable composites in Class II restorations. Quintessence Internacional, 35( ja 2004), 29-34. -
NLM
Loguercio AD, Bauer JR de O, Reis A, Grande RHM. In vitro microleakage of packable composites in Class II restorations. Quintessence Internacional. 2004 ; 35( ja 2004): 29-34. -
Vancouver
Loguercio AD, Bauer JR de O, Reis A, Grande RHM. In vitro microleakage of packable composites in Class II restorations. Quintessence Internacional. 2004 ; 35( ja 2004): 29-34. - Influência dos métodos para armazenagem/envelhecimento na microinfiltração
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