Influence of simulated pulpal pressure on the variation of intrapulpal temperature during adhesive system light-curing

Tânia Mara da Silva, Lucelia Lemes Gonçalves, Erika Priscila Siqueira, Tatiana Cursino Pereira, Solimar de Oliveira Pontes, Amanda Reis Grecca, Stephanie Ribeiro Lopes, Sergio Eduardo de Paiva Gonçalves

Abstract


Objective: To evaluate the effects of simulated pulpal pressure (SPP) on the variation of intrapulpal temperature (DT) during light-curing of the adhesive system. Material e methods: One hundred sound human molars were sectioned from the highest pulp horn to obtain a 2-mm of thickness dentin. The specimens were randomly divided into two groups: (n=50), according to the presence or absence of SPP (15 cm H2O). The specimens were sequentially treated as follows: 37% phosphoric acid (Scotchbond Universal; 3M/ESPE), adhesive system (Scotchbond Universal/3M ESPE) and light-curing (10 seconds). DT was evaluated during adhesive light-curing with a K-type thermometer put inside the pulp chamber. Data were analysed by using Mann-Whitney’s test (at 5%). Results: According to Mann-Whitney’s test, the absence group presented a DT of 2°C, whereas the presence group 1°C. The mean values of DT were 0.82±0.56°C for the presence group and 2.30±0.73°C for the absence group. Conclusions: Simulated pulpal pressure significantly reduced the temperature rise in the pulp chamber during light-curing of the adhesive system, showing the importance of inserting this protocol of simulated pulpal pressure in the laboratory procedures.

 Keywords: Dentin; Light-curing; Pulpal pressure; Temperature.


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DOI: http://dx.doi.org/10.14295/bds.2017.v20i2.1409