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- Title
Light energy transmission through cured resin composite and human dentin.
- Authors
Price, Richard B. T.; Murphy, Darcy G.; Dérand, Tore
- Abstract
Objective: This study determined the amount of light energy transmitted through various densities of cured resin composite and human dentin when 2 different light intensities were used. Method and materials: The maximum light energy (mW/cm²) transmitted through disks (0.46 to 5.85 mm thickness) of 7 resin composites and human dentin was measured when either a Standard or a Turbo light guide was attached to a curing light. The effects of the 2 light guides, the specimen, thickness, and type of specimen dentin on light energy transmission were determined. Results: The mean light energy reading at the surface of the specimens was 682.1 mW/cm² with the Standard light guide and 1,014 mW/cm² with the Turbo light guide. For all the specimens, there was an exponential decrease in light energy transmitted as the specimen thickness increased. The analysis of covariance showed that the specimen, thickness, and light guide all had a statistically significant effect. significantly more light energy (about 42%) was transmitted through the cured composite specimens. There was an exponential decrease in the light energy transmitted through 7 rein composites and dentin as the specimen thickness increased. (Quintessence Int 2000; 31: 659-667)
- Publication
Quintessence International, 2000, Vol 31, Issue 9, p659
- ISSN
0033-6572
- Publication type
Academic Journal