Journal of Conservative Dentistry
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ARTICLE
Year : 2006  |  Volume : 9  |  Issue : 3  |  Page : 110-112

Effect of pulpal temperature changes on finishing and polishing of composites- An in-vitro study


Department of Conservative Dentistry and Endodontics, College of Dental Sciences, Davangere-577004, Karnataka, India

Correspondence Address:
Jaya P Daniel
Department of Conservative Dentistry and Endodontics, College of Dental Sciences, Davangere-577004, Karnataka
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0972-0707.42383

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The aim of the study was to find the pulpal temperature changes during finishing of composite restorative material. 180 teeth were taken and divided into 3 groups with 60 teeth in each group. The 3 groups were again divided into six sub groups with ten teeth in each group. Class v cavities were made in all the teeth and a base of glass ionomer cement was given, and it was then restored with z250 composite. Apical 5 mm of all the teeth were cut and a thermocouple probe was then inserted into the canal till it reached the roof of the pulp chamber. Apical orifice was closed with silicone impression material. The teeth were immersed in a water bath to maintain a steady temperature of 36 C. Finishing was done in all the 3 groups with coarse, medium and fine grit discs respectively with Shofu super snap. In 6 subgroups, 4 were finished with continuous pressure and no water coolant at 4000 rpm, 6000 rpm, 8000 rpm and 10000 rpm. The other two subgroups were finished with intermittent pressure and no water coolant at 10,000 rpm while the other was finished with 10000 rpm in continuous pressure and water coolant. Results showed a lesser rise in temperature with the use of lower speeds, water coolant and intermittent pressure. Coarse discs produced more temperature rise when compared to medium and fine grit discs. The study concluded that finishing should he in lower speeds, with intermittent pressure and with the use of water coolants to reduce the rise in intra pulpal temperature.


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