PMID: 9553880Apr 29, 1998Paper

New acrylic resin composite with improved thermal diffusivity

The Journal of Prosthetic Dentistry
P B MessersmithS Lindberg

Abstract

Studies have shown that physical characteristics of denture base materials may affect patient acceptance of denture prostheses by altering sensory experience of food during mastication. Thermal diffusivity is one material property that has been cited as being important in determining gustatory response, with denture base acrylic resins having low thermal diffusivity compared with denture base metal alloys. This study prepared and characterized experimental acrylic resin composite material with increased thermal diffusivity. Sapphire (Al2O3) whiskers were added to conventional denture base acrylic resin during processing to achieve loadings of 9.35% and 15% by volume. Cylindrical test specimens containing an embedded thermocouple were used to determine thermal diffusivity over a physiologic temperature range (0 degree to 70 degrees C). Thermal diffusivities of the sapphire containing composites were found to be significantly higher than the unmodified acrylic resin. Thermal diffusivity was found to increase in proportion to the volume percentage of sapphire filler, which suggested that the high aspect ratio ceramic particles formed a pathway for heat conduction through the insulating polymer matrix. The thermal diffusivity of de...Continue Reading

Citations

Jun 11, 2017·Journal of Oral Rehabilitation·C BatisseE Nicolas
May 17, 2008·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Ayman E EllakwaAli M El-Sheikh
Apr 17, 2009·Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [et Al.]·Vesna MileticMaja Lezaja
Jun 8, 2012·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Pratibha YadavRishabh Garg

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