Thermal analysis of bulk filled composite resin polymerization using various light curing modes according to the curing depth and approximation to the cavity wall
AUTOR(ES)
Chang, Hoon-Sang, Cho, Kyu-Jeong, Park, Su-Jung, Lee, Bin-Na, Hwang, Yun-Chan, Oh, Won-Mann, Hwang, In-Nam
FONTE
J. Appl. Oral Sci.
DATA DE PUBLICAÇÃO
2013-07
RESUMO
OBJECTIVE: The purpose of this study was to investigate the polymerization temperature of a bulk filled composite resin light-activated with various light curing modes using infrared thermography according to the curing depth and approximation to the cavity wall. MATERIAL AND METHODS: Composite resin (AeliteFlo, Bisco, Schaumburg, IL, USA) was inserted into a Class II cavity prepared in the Teflon blocks and was cured with a LED light curing unit (Dr's Light, GoodDoctors Co., Seoul, Korea) using various light curing modes for 20 s. Polymerization temperature was measured with an infrared thermographic camera (Thermovision 900 SW/TE, Agema Infra-red Systems AB, Danderyd, Sweden) for 40 s at measurement spots adjacent to the cavity wall and in the middle of the cavity from the surface to a 4 mm depth. Data were analyzed according to the light curing modes with one-way ANOVA, and according to curing depth and approximation to the cavity wall with two-way ANOVA. RESULTS: The peak polymerization temperature of the composite resin was not affected by the light curing modes. According to the curing depth, the peak polymerization temperature at the depth of 1 mm to 3 mm was significantly higher than that at the depth of 4 mm, and on the surface. The peak polymerization temperature of the spots in the middle of the cavity was higher than that measured in spots adjacent to the cavity wall. CONCLUSION: In the photopolymerization of the composite resin, the temperature was higher in the middle of the cavity compared to the outer surface or at the internal walls of the prepared cavity.
Documentos Relacionados
- Effect of light curing modes and ethanol immersion media on the susceptibility of a microhybrid composite resin to staining
- Composite depth of cure using four polymerization techniques
- The Effect of Composition, Temperature and Post-Irradiation Curing of Bulk Fill Resin Composites on Polymerization Efficiency
- Influence of the curing method on the post-polymerization shrinkage stress of a composite resin
- Dual-curing, self-adhesive resin cement: influence of the polymerization modes on the degree of conversion and microhardness