Temperature in the Pulp Chamber During Polishing of Amalgam Restorations

Abstract

Temperature changes in the pulp chamber were determined by means of thermocouples during polishing procedures of Class V amalgam restorations. The dependence of the temperature elevation on the separation between cavity floor and thermocouple junction was determined. Temperatures obtained with rubber cups were higher than those with cup brushes. Intermittent polishing caused less heating, by about 30%, than continuous procedures. Cavity bases and liners, applied at a thickness of 0.2 to 0.3 mm, had little influence on the temperatures in the pulp chamber.

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“…If care is not exercised during polishing, excessive heat may be produced (Grajower, Kaufman & Rajstein, 1974;Aplin, Cantwell & Sorensen, 1967;Christensen & Dilts, 1968;Eames, Minnock & Wasden, 1966). Heat may bring mercury to the surface of the amalgam resulting subsequently in reduced surface hardness.…”

Thermal conductive analysis of restored teeth by finite element method

“…Therefore there have been many reports concerning interpulpal thermal changes and pathological changes due to external thermal irritation. Aplin, Sorenson & Cantwell (1967), Christensen & Dilts (1968) and Grajower, Kaufmann & Rajstein (1974) investigated the interpulpal thermal changes during polishing of restorations. Interpulpal thermal changes during tooth preparation were reported by Schuchard & Watkins (1961) and Bhaskar & Lilly (1965).…”