Premium
Shear Bond Strength of Denture Teeth to Two Chemically Different Denture Base Resins after Various Surface Treatments
Author(s) -
Akin Hakan,
Tugut Faik,
Guney Umit,
Akar Turker
Publication year - 2014
Publication title -
journal of prosthodontics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.902
H-Index - 60
eISSN - 1532-849X
pISSN - 1059-941X
DOI - 10.1111/jopr.12081
Subject(s) - acrylic resin , bond strength , materials science , universal testing machine , adhesive , methacrylate , composite material , dental bonding , crosshead , dentistry , ultimate tensile strength , polymer , polymerization , flexural strength , medicine , layer (electronics) , coating
Purpose Debonding of acrylic teeth from the denture base remains a major problem in prosthodontics. The objective of this study was to evaluate the effect of various surface treatments on the shear bond strength of the two chemically different denture base resins—polymethyl methacrylate (PMMA) and urethane dimethacrylate (UDMA). Materials and Methods Two denture base resins, heat‐cured PMMA (Meliodent) and light‐activated UDMA (Eclipse), were used in this study. A total of 60 molar acrylic denture teeth were randomly separated into four groups (n = 15), according to surface treatment: acrylic untreated (group AC), Eclipse untreated (group EC), treated with eclipse bonding agent (group EB), and Er:YAG laser‐irradiated eclipse (group EL). Shear bond strength test specimens were prepared according to the manufacturers’ instructions. Specimens were subjected to shear bond strength test by a universal testing machine with a 1 mm/min crosshead speed. The data were analyzed with one‐way ANOVA and post hoc Tukey‐Kramer multiple comparison tests ( α = 0.05). Results The highest mean bond strength was observed in specimens of group EB, and the lowest was observed in group EC specimens. A statistically significant difference in shear bond strength was found among all groups ( p < 0.001), except between groups EC and EL ( p = 0.61). Conclusion The two chemically different denture base polymers showed different shear bond strength values to acrylic denture teeth. Laser‐irradiation of the adhesive surface was found to be ineffective on improving bond strength of acrylic denture teeth to denture base resin. Eclipse bonding agent should be used as a part of denture fabrication with the Eclipse Resin System.