Physical properties of denture base resins potentially resistant to Candida adhesion.
OBJECTIVE
The addition of anionic charge on denture base resins has been shown to inhibit Candida albicans adhesion and to facilitate adsorption of salivary defense molecules. The aim of this study was to evaluate the physical properties of a modified denture base resin for denture fabrication.


METHODS
Specimens made from heat polymerizing resin Lucitone 199 were used as the control group. The two experimental groups, E-10 and E-20, had 10% and 20%, respectively, of the monomer substituted with an experimental phosphate-containing monomer. Flexural strength and modulus, water sorption, solubility, and color stability tests were conducted to ensure compliance with ADA specification No. 12. Water diffusion coefficient into the resins and stainability were also assessed. ANOVA and Scheffé tests were performed for statistical significance.


RESULTS
There was an overall decline in all properties with the addition of the experimental phosphate compound. The flexural strength and modulus, water sorption and solubility for E-10, as well as the control were, however, within the ADA specifications. The diffusion coefficients were significantly different (p < 0.05) for the three groups. Staining and color specimens showed no significant difference (p > 0.05) among the three groups.


CONCLUSIONS
Within the limitations of this study, the physical properties of the phosphate denture base resin at 10% should be suitable for denture fabrication based on the properties assessed.
Tufts University School of Dental Medicine, Department of Prosthodontics and Operative Dentistry, Boston, MA, USA.
Gunjan
G
Dhir
David W
DW
Berzins
Virendra B
VB
Dhuru
A Raj
AR
Periathamby
Andrew
A
Dentino
D000042:Absorption; D000180:Acrylic Resins / Q000737:chemistry; D000327:Adsorption; D002176:Candida albicans / Q000502:physiology*; D003069:Coffee; D003116:Color; D003764:Dental Materials / Q000737:chemistry*; D003819:Denture Bases / Q000382:microbiology*; D003779:Denture Design / Q000379:methods*; D004058:Diffusion; D004548:Elasticity; D006358:Hot Temperature; D006801:Humans; D008422:Materials Testing; D010710:Phosphates / Q000737:chemistry; D018583:Pliability; D019904:Polymethyl Methacrylate / Q000737:chemistry*; D012995:Solubility; D013314:Stress, Mechanical; D013499:Surface Properties; D014867:Water / Q000737:chemistry
D000180:Acrylic Resins; D003069:Coffee; D003764:Dental Materials; D010710:Phosphates; D014867:Water; C040291:Lucitone; D019904:Polymethyl Methacrylate