European Journal of Prosthodontics and Restorative Dentistry

Temperature Rise During Intraoral Polymerization of Self-Cured Hard Denture Base Liners.

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Cover Date

June 2010

Print ISSN

0965-7452

Vol

18

Issue

2

Abstract

Abstract- The aim of this in-vivo study was to evaluate the temperature rise during polymerization of five chairside selfcured hard denture base reliners. For the same patient, 30 identical baseplates, exposing a space on their tissue surface to accommodate the lining material, were made of a light-cured denture base material. A hole was drilled in the center of this area to enable the thermocouple wire of the temperature measuring device to have direct access to the palatal surface of the baseplate. Six baseplates were used for each of the five lining materials tested. Temperature recordings were made every 15 seconds. Data were analyzed using single factor analysis of variance (ANOVA) and the Scheffe’s post-hoc analysis for multiple comparisons. The mean maximum temperature values ranged from 40.2oC to 45.7oC being statistically different among the materials (P<0.001). The maximum peak temperature was 53oC and the lowest 39oC. Also the difference between the time each material reached the peak of temperature was statistically significant. (P<0.0001) A temperature range of 5.5oC was demonstrated among materials, with the highest polymerization temperatures recorded for Flexacryl Hard and the lowest for Rebase and GC Reline hard. Ufi-gel hard showed the fastest polymerization cycle and was the first to reach the maximum temperature. The available chairside hard liners must be chosen with care considering the thermal effect on the oral mucosa and the discomfort of patient.

KEY WORDS: Liners, denture relining, chairside reliners, complete dentures, denture wearing.