Hardness and surface roughness of differently processed denture base acrylic resins after immersion in simulated gastric acid

The effect of gastric acid on the surface properties of denture base acrylic resin is unknown. The purpose of this in vitro study was to evaluate changes in the surface roughness and hardness of denture base acrylic resins after immersion in simulated gastric acid. Acrylic resin specimens (n=10) wer...

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Bibliographic Details
Published in:The Journal of prosthetic dentistry 2023-02, Vol.129 (2), p.364.e1-364.e9
Main Authors: Tinastepe, Neslihan, Malkondu, Ozlem, Kazazoglu, Ender
Format: Article
Language:English
Subjects:
Acrylic Resins
Denture Bases
Gastric Acid
Hardness
Immersion
Materials Testing
Saliva, Artificial
Surface Properties
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Summary:The effect of gastric acid on the surface properties of denture base acrylic resin is unknown. The purpose of this in vitro study was to evaluate changes in the surface roughness and hardness of denture base acrylic resins after immersion in simulated gastric acid. Acrylic resin specimens (n=10) were prepared with 3 different processing techniques (compression-molded, injection-molded, and computer-aided design and computer-aided manufacturing [CAD-CAM] milled) and exposed to either gastric acid or artificial saliva (control). Surface roughness and hardness were measured at baseline (T0) and after 24-hour (T24) and 96-hour (T96) immersion in the solutions. The surface roughness and hardness data were analyzed by 3-way ANOVA and the Tukey HSD test (α=.05). At T24, the greatest change in surface hardness was observed for compression-molded specimens in gastric acid (P
ISSN:0022-3913
1097-6841
DOI:10.1016/j.prosdent.2022.12.001