ArticleCureus2025
Assessment of Physical and Mechanical Properties of Auto-Polymerized Acrylic Resins Using a Custom Pressure Vessel Technique: An In Vitro Study.
Article in Cureus, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
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Who cites it
1 citing paper in PubMed.
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Authors and funding
9 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
introductionAuto-polymerized acrylic resins are essential in dentistry because of their versatility; however, their suboptimal physical and mechanical properties can limit their clinical performance. This study aimed to evaluate the impact of custom-made pressure vessel treatment on the physical, mechanical, and aesthetic properties of these resins, specifically by comparing polymerization shrinkage, assessing flexural strength, measuring water sorption, evaluating surface hardness, analyzing porosity, and determining color stability after staining. MATERIALS AND
methodsThis in vitro study involved 30 specimens of auto-polymerized acrylic resin, equally divided into a control group (n = 15, cured under ambient conditions) and an experimental group (n = 15, cured in a custom pressure vessel at 2.2-3.0 bar). Specimens were prepared in standardized molds, polished, and stored in distilled water to mimic oral conditions. The outcomes assessed included polymerization shrinkage (volumetric analysis), water sorption (weight change post-immersion), flexural strength (three-point bending test), surface hardness (Vickers test), porosity (scanning electron microscopy), and color stability (Commission Internationale de l'Éclairage (CIE) L
resultsThe pressure-treated group exhibited significantly reduced water sorption (2.30 ± 1.11%) compared to the control group (3.47 ± 1.48%), with a mean difference of 1.17% (p = 0.021), and increased flexural strength (66.62 ± 8.67 MPa) compared to the control group (58.64 ± 10.97 MPa, p = 0.035), indicating improved material density and mechanical durability. No significant differences were found in polymerization shrinkage (p = 0.273), surface hardness (p = 0.840), or color stability, suggesting that the pressure treatment maintained the dimensional and esthetic integrity.
conclusionCustom pressure vessel treatment enhanced the water sorption resistance and flexural strength of auto-polymerized acrylic resins without affecting their shrinkage, hardness, or color stability. These findings suggest the potential for improved durability in dental appliances, supporting the adoption of this technique in clinical practice, pending further in vivo validation.
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