Effect of Artificial Saliva Aging on The Surface Properties of CAD/CAM and Heat-Compressed Molded PMMA Dentures
Year: 2026
Type: article
Abstract: This study simulates the oral environment by immersing the denture specimens in artificial saliva aging of the surface properties- micro-hardness and surface roughness - of Poly Methyl Methacrylate (PMMA) denture bases fabricated using ComputerAided Design and Computer-Aided Manufacturing (CAD/CAM) and conventional compressed molded (CCM).Methodology: CAD/CAM and CCM PMMA denture bases were fabricated and immersed in artificial saliva at 37ºC for a week.Surface micro-hardness and roughness of the samples were subsequently measured. The data was analyzed statistically to drawcomparisons between the two fabrication techniques.The CAD/CAM PMMA denture bases exhibited significantly higher surface micro-hardness (mean: 25.26) than the CCMdenture bases (mean: 18.76), suggesting enhanced abrasion resistance. Similarly, the surface roughness of CAD/CAM PMMAwas found to be within the clinically acceptable value (0.13), and significantly less than the CCM PMMA (1.61), indicatingbetter biofilm resistance.Conclusion: Under one-week artificial-saliva aging at 37 ºC, CAD/CAM-milled PMMA denture base specimens showed highersurface micro-hardness and lower surface roughness than PMMA, indicating better maintenance of surface properties underthe tested in vitro conditions.
Source: Tripolitana Medical Journal
Institutions: Polymer Research Center, University of Sharjah
Language: English
Subfield: General Dentistry
Field: Dentistry
Domain: Health Sciences
Open Access status: diamond
OpenAlex ID: W7220594867