Investigation of bonding properties of denture bases to silicone-based soft denture liner immersed in isobutyl methacrylate and 2-hydroxyethyl methacrylate.
OBJECTIVE
The purpose of this study was to investigate the bonding properties of denture bases to silicone-based soft denture liners immersed in isobutyl methacrylate (iBMA) and 2-hydroxyethyl methacrylate (HEMA) for various lengths of time.


METHODS
Polymethyl methacrylate (PMMA) test specimens were fabricated (75 mm in length, 12 mm in diameter at the thickest section, and 7 mm at the thinnest section) and then randomly assigned to five groups (n=15); untreated (Group 1), resilient liner immersed in iBMA for 1 minute (Group 2), resilient liner immersed in iBMA for 3 minutes (Group 3), resilient liner immersed in HEMA for 1 minute (Group 4), and resilient liner immersed in HEMA for 3 minutes (Group 5). The resilient liner specimens were processed between 2 PMMA blocks. Bonding strength of the liners to PMMA was compared by tensile test with a universal testing machine at a crosshead speed of 5 mm/min. Data were evaluated by 1-way ANOVA and post hoc Tukey-Kramer multiple comparisons tests (α=0.05).


RESULTS
The highest mean value of force was observed in Group 3 specimens. The differences between groups were statistically significant (P<.05), except between Group 1 and Group 4 (P=.063).


CONCLUSIONS
Immersion of silicone-based soft denture liners in iBMA for 3 minutes doubled the tensile bond strength between the silicone soft liner and PMMA denture base materials compared to the control group.
Department of Prosthodontics, Faculty of Dentistry, Cumhuriyet University, Sivas, Turkey.
Hakan
H
Akin
Department of Prosthodontics, Faculty of Dentistry, Cumhuriyet University, Sivas, Turkey.
Faik
F
Tugut
Department of Prosthodontics, Faculty of Dentistry, Cumhuriyet University, Sivas, Turkey.
Burcu
B
Mutaf
Department of Prosthodontics, Faculty of Dentistry, Cumhuriyet University, Sivas, Turkey.
Umit
U
Guney
2-hydroxyethyl methacrylate; Bond strength; Isobutyl methacrylate; Soft denture liner