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Evaluation of thermal rise on simulated pulp tissue during light-cured direct capping in vitro: an artificial
Onur Emir Özkan1, Sena Kaşıkçı2, Müslüm Arıcı3
1Department of Endodontics, Faculty of Dentistry, Kocaeli University, Kocaeli, 41190, Türkiye.
Background:
To evaluate the temperature values including initial, maximum, and rising caused by light-cured materials used for direct capping during polymerisation.
Methods:
A 3 mm deep, wide, and length class-I cavity was prepared to a premolar tooth, leaving hard tissue at the pulpal floor of 1 mm thickness with a 1 mm diameter of exposure. The sample was placed in a customised mimicry setup in which the temperature was standardised (37 °C) by a double-verified system. Light-curing capping materials (Theracal LC, Theracal PT, Harvard BioCal, and Ultrablend Plus) were placed, polymerised, and temperature values were recorded. Kruskal-Wallis test was used to compare parameters among groups, and Dunn's test was used to define the group that caused the difference (p < 0.05).
Results:
There were statistically significant differences between the materials in terms of initial, maximum, and temperature rising values (pin=0.014, pmax=0.034, ptr= 0.016). The values of Theracal PT were measured highest in terms of temperature increase, while no statistically significant difference was observed between other materials during polymerisation.
Conclusions:
Theracal PT caused higher temperature rise, however, it did not exceed 5.6 °C, which is the critical value for the pulp. Theracal PT should be used with caution as its use during direct capping causes high temperature increases, and there is a need for a light-curing regime to be designed for its use.
