As fotografias odontológicas são responsáveis pelo registro permanente das condições clínicas e são aplicadas como documentação, ensino, comunicação entre dentistas, pacientes e técnicos, marketing, além de serem úteis como validade jurídica, tornando-se indispensáveis na rotina clínica diária. No entanto, a ação de fotografar, embora simples, necessita do conhecimento do operador sobre câmeras fotográficas e câmeras dos aparelhos celulares e suas variadas funções, evitando que os registros fotográficos se tornem custosos e exaustivos. O objetivo desse trabalho é apresentar a "régua milimetrada
Objective: To evaluate the in vitro pulpal temperature rise (ΔT) within the pulp chamber when low-and high-viscosity bulk-fill resin composites are photo-cured using laser or contemporary light curing units (LCUs).
Materials and Methods: The light output from five LCUs was measured. Nonretentive Class I and V cavities were prepared in one upper molar. Two T-type thermocouples were inserted into the pulp chamber. After the PT values reached 32 C under simulated pulp flow (0.026 mL/min), both cavities were restored with: Filtek One Bulk Fill (3 M), Filtek Bulk Fill Flow (3 M), Tetric PowerFill (Ivoclar Vivadent), or Tetric PowerFlow (Ivoclar Vivadent). The tooth was exposed as follows: Monet Laser (1 and 3 s), PowerCure (3 and 20 s), PinkWave (3 and 20 s), Valo X (5 and 20 s) and SmartLite Pro (20 s). The ΔT data were subjected to one-way ANOVA followed by Scheffe's post hoc test.Results: Monet 1 s (1.9 J) and PinkWave 20 s (30.1 J) delivered the least and the highest amount of energy, respectively. Valo X and PinkWave used for 20 s produced the highest ΔT values (3.4-4.1 C). Monet 1 s, PinkWave 3 s, PowerCure 3 s (except FB-Flow) and Monet 3 s for FB-One and TP-Fill produced the lowest ΔT values (0.9-1.7 C). No significant differences were found among composites.Conclusions: Short 1-to 3-s exposures produced acceptable temperature rises, regardless of the composite.Clinical Significance: The energy delivered to the tooth by the LCUs affects the temperature rise inside the pulp. The short 1-3 s exposure times used in this study delivered the least amount of energy and produced a lower temperature rise. However, the RBC may not have received sufficient energy to be adequately photo-cured.
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