Peel strength of denture liner to PMMA and polyamide: laser versus air-abrasion
The Journal of Advanced Prosthodontics
;
: 287-295, 2013.
Article
in English
| WPRIM
| ID: wpr-181916
ABSTRACT
PURPOSE:
This study investigated the effect of laser parameters and air-abrasion on the peel strength of silicon-based soft denture liner to different denture resins. MATERIALS ANDMETHODS:
Specimens (N=180) were prepared out of three different denture base resins (Rodex, cross-linked denture base acrylic resin; Paladent, heat-cured acrylic resin; Deflex, Polyamide resin) (75 mm x 25 mm x 3 mm). A silicon-based soft denture liner (Molloplast B) was applied to the denture resins after the following conditioningmethods:
a) Air-abrasion (50 microm), b) Er,CrYSGG laser (Waterlase MD Turbo, Biolase Technology) at 2 W-20 Hz, c) Er,CrYSGG laser at 2 W-30 Hz, d) Er,CrYSGG laser at 3 W-20 Hz, e) Er,CrYSGG laser at 3 W-30 Hz. Non-conditioned group acted as the control group. Peel test was performed in a universal testing machine. Failure modes were evaluated visually. Data were analyzed using two-way ANOVA and Tukey's test (alpha=.05).RESULTS:
Denture liner tested showed increased peel strength after laser treatment with different parameters (3.9+/-0.4 - 5.58+/-0.6 MPa) compared to the control (3.64+/-0.5 - 4.58+/-0.5 MPa) and air-abraded groups (3.1+/-0.6 - 4.46+/-0.3 MPa), but the results were not statistically significant except for Paladent, with the pretreatment of Er,CrYSGG laser at 3 W-20 Hz. Polyamide resin after air-abrasion showed significantly lower peel strength than those of other groups (3.1+/-0.6 MPa).CONCLUSION:
Heat-cured acrylic resin, PMMA, may benefit from Er,CrYSGG laser treatment at 3 W-20 Hz irradiation. Air-abrasion of polyamide resins should be avoided not to impair their peel bond strengths to silicon-based soft denture liners.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Dentures
/
Collodion
/
Polymethyl Methacrylate
/
Denture Bases
/
Denture Liners
/
Nylons
Language:
English
Journal:
The Journal of Advanced Prosthodontics
Year:
2013
Type:
Article
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