Evaluation of mechanical and thermal properties of commonly used denture base resins

Rodney D. Phoenix, Michael A. Mansueto, Neal A. Ackerman, Robert E. Jones

Research output: Contribution to journalArticle

66 Scopus citations

Abstract

Purpose: The purpose of this investigation was to evaluate and compare the mechanical and thermal properties of 6 commonly used polymethyl methacrylate denture base resins. Materials and Methods: Sorption, solubility, color stability, adaptation, flexural stiffness, and hardness were assessed to determine compliance with ADA Specification No. 12. Thermal assessments were performed using differential scanning calorimetry and dynamic mechanical analysis. Results were assessed using statistical and observational analyses. Results: All materials satisfied ADA requirements for sorption, solubility, and color stability. Adaptation testing indicated that microwave-activated systems provided better adaptation to associated casts than conventional heat-activated resins. According to flexural testing results, microwaveable resins were relatively stiff, while rubber-modified resins were more flexible. Differential scanning calorimetry indicated that microwave-activated systems were more completely polymerized than conventional heat-activated materials. Conclusion: The microwaveable resins displayed better adaptation, greater stiffness, and greater surface hardness than other denture base resins included in this investigation. Elastomeric toughening agents yielded decreased stiffness, decreased surface hardness, and decreased glass transition temperatures.

Original languageEnglish (US)
Pages (from-to)17-27
Number of pages11
JournalJournal of Prosthodontics
Volume13
Issue number1
DOIs
StatePublished - Mar 1 2004

Keywords

  • Adaptation
  • Differential scanning calorimetry
  • Dynamic mechanical analysis
  • PMMA
  • Thermal analysis

ASJC Scopus subject areas

  • Dentistry(all)

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