Journal article
Flexural and fatigue strengths of denture base resin
The Journal of prosthetic dentistry, Vol.100(1), pp.47-51
2008
DOI: 10.1016/S0022-3913(08)60136-5
PMID: 18589074
Abstract
Mechanical properties of denture acrylic resins are important for the clinical success of multiple types of prostheses. Acrylic resins must be strong and resilient so as to withstand impact. Few studies utilize cyclic loads to characterize material response to repeated stress.
The purpose of this study was to evaluate static and dynamic flexure properties of a variety of acrylic resins utilized in the fabrication of prostheses: (1) heat-polymerized polymethyl methacrylate (PMMA), powder-liquid type, and (2) a newly introduced, visible light-polymerized urethane dimethacrylate dough type.
Twenty rectangular bars each of 4 PMMA acrylic resin materials (Diamond D, Fricke HI-I, Lucitone 199, Nature-Cryl Hi-Plus) and 1 urethane dimethacrylate (Eclipse) were fabricated and stored in 100% humidity for 30 days. Half of the specimens for each group were submitted to a static 3-point flexure test. The other half was submitted to cycling loading at 5 Hz for 10
4 cycles. Data were analyzed using 1-way ANOVA and 2-way ANOVA, followed by Tukey HSD or Bonferroni post hoc tests when necessary (α=.05).
Mean static flexure strength (SDs) in MPa were: Eclipse, 127.11 (5.83); Diamond D, 84.92 (5.10); Lucitone 199, 83.96 (11.96); HI-I, 79.54 (5.84); and Nature-Cryl Hi-Plus, 75.82 (6.96). Mean flexural strengths (SDs) in MPa postcycling were: Eclipse, 113.36 (31.29); Diamond D, 88.26 (5.46); Nature-Cryl Hi-Plus, 81.86 (4.93); HI-I, 79.18 (6.60); and Lucitone 199, 74.34 (4.95).
The visible light-polymerized urethane dimethacrylate resin (Eclipse) showed greater flexure strength than all PMMA heat-polymerized resins for both static and cycled groups (
P<.001). Yet the Eclipse material had lower load limits, and demonstrated brittle-type behavior and greater standard deviations. The heat-polymerized PMMA materials did not significantly differ from each other after static or cyclic testing. (J Prosthet Dent 2008;100:47-51)
Details
- Title: Subtitle
- Flexural and fatigue strengths of denture base resin
- Creators
- Ana M Diaz-Arnold - Professor, Department of Family Dentistry, University of Iowa, College of Dentistry, Iowa City, IowaMarcos A Vargas - Professor, Department of Family Dentistry, University of Iowa, College of Dentistry, Iowa City, IowaKenneth L Shaull - Instructional Research Associate, Department of Family Dentistry, University of Iowa, College of Dentistry, Iowa City, IowaJohn E Laffoon - Research Assistant III, Dows Institute for Dental Research, University of Iowa, College of Dentistry, Iowa City, IowaFang Qian - Associate Research Scientist, Department of Preventive and Community Dentistry, University of Iowa, College of Dentistry, Iowa City, Iowa
- Resource Type
- Journal article
- Publication Details
- The Journal of prosthetic dentistry, Vol.100(1), pp.47-51
- Publisher
- Mosby, Inc
- DOI
- 10.1016/S0022-3913(08)60136-5
- PMID
- 18589074
- ISSN
- 0022-3913
- eISSN
- 1097-6841
- Language
- English
- Date published
- 2008
- Academic Unit
- Preventive and Community Dentistry; Family Dentistry; Dental Research
- Record Identifier
- 9984065988502771
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