The role of surface treatments on the bond between acrylic denture base and teeth.
The aim of this study was to compare the bond strength between acrylic denture base and teeth subjected to 6 surface treatments. Ninety-six specimens were made with poly(methylmethacrylate) teeth bonded to a microwave-polymerized acrylic denture base material. The specimens were distributed into 6 groups (n=16) according to surface treatments: CT - no treatment (control); MN - methylmethacrylate monomer etching; AO - 50-microm-particle aluminum oxide air abrasion; BR - glaze removal with a round bur; ST - surface grinding with an aluminum oxide abrasive stone; group CV - cavity preparation (diatorics). The control and surface-treated groups were subjected to a compressive load at 45 masculine angle to the long axis of the teeth. Data were analyzed by one-way ANOVA, followed by Scheffé's test (p<0.05). Bond strength means and (SD) in kgf for groups were: CT: 18.19 (7.14), MN: 18.34 (5.28), AO: 23.82 (5.40), BR: 23.30 (4.79), ST: 25.39 (7.80) and CV: 17.48 (7.17). There was statistically significant difference (p=0.037997) only between ST and CV. In conclusion, ridge lap surface grinding with an aluminum oxide abrasive stone provided the highest bond strength, though it differed significantly only when compared to diatorics. The other surface treatments provided similar bond between the acrylic denture base and teeth.
Bragaglia
Lauro Egídio
LE
Department of Dentistry, Dental School, Federal University of Santa Catarina, Florianópolis, SC, Brazil.
Prates
Luiz Henrique Maykot
LH
Calvo
Maria Cristina Marino
MC
D000180:Acrylic Resins; D020906:Air Abrasion, Dental; D019245:Compressive Strength; D001840:Dental Bonding / Q000379:methods*; D045662:Dental Etching; D003799:Dental Stress Analysis; D003819:Denture Bases; D003779:Denture Design; D003765:Models, Dental; D019904:Polymethyl Methacrylate; D013499:Surface Properties; D014093:Tooth, Artificial
D000180:Acrylic Resins; D019904:Polymethyl Methacrylate