Wettability of saliva substitutes on CAD/CAM denture base materials
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Date
2024-06-26
Authors
Mikhail, Paul
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Abstract
Purpose: To measure and compare contact angle (CA) goniometry of liquids on denture bases manufactured by different methods, and to investigate the impact of physical and chemical topography, as well as various saliva substitutes, on contact angle measurements.
Methods: This study was organized into three phases. Phase 1 measured contact angle (CA) of deionized water on two non-polished CAD/CAM denture bases: Mnp (milled; Lucitone 199 disc milled in Dentsply MCX5) and Pnp (printed; Formlabs denture base resin printed in Formlabs 3B). Phase 2 measured CA of deionized water on 5 polished denture bases: C (conventional; Lucitone 199 heat cured), M (milled), P (printed), I (injection molded; Ivocap), and F (flexible; Ultraflex). Phase 3 measured CA of 5 saliva substitutes – Biotene, VEGA, Spry, Moi-Stir, and Dentilube – on the 5 polished denture bases. Ten droplet measurements were obtained for each group, with each droplet analyzed for static CA, advancing contact angle (ACA), receding contact angle (RCA), and contact angle hysteresis (CAH). Statistical analysis was conducted using ANOVA, with a significance level set at 0.05.
Results: The Pnp exhibited the highest ACA with statistical significance, while the Pnp, Mnp, and I had the lowest RCA. CAH was demonstrated to have statistically significant differences among the denture bases, with Pnp exhibiting the largest CAH, followed by Mnp, and then the polished denture bases. There were no significant differences in CAH among the polished denture bases. The saliva substitutes exhibited differences in ACA, with Spry and VEGA having the highest ACA, while Biotene had the lowest.
Conclusion: The manufacturing methods of denture bases influences the CAH, while the chemical composition of the denture base specimens does not appear to affect CAH. Saliva substitutes do, however, impact CA measurements.
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Keywords
wetability, complete denture, computer aided design, computer aided manufacturing, denture retention, denture stability, contact angle, denture base, artificical saliva