Bond Strength Assessment Between Acrylic Teeth and Acrylic Resin Repairs: Effect of Different Surface Treatments

Abstract

The aim of this study was to compare the shear bond strength between acrylic resin teeth and autopolymerizing acrylic resin repairs after different surface treatments. Seventy-two upper anterior acrylic resin denture teeth (MFT, Vita, Germany) were selected. Specimens were randomly assigned into six groups (n=12): G1-C, without surface treatment (control); G2-M, methylmetacrylate monomer (Jet, Clássico, Brazil) application; G3-A treatment with methylmetacrylate and metiletilcetone-based bonding agent (Vitacoll, Vita, Germany). The surface of G4-OA, G5-OAM and G6-OAA was airborne-particle abraded with aluminum oxide (Polidental, Wilson, Brazil); being repeated the treatments respectively of groups G1-C, G2-M e G3-A. All groups were then repaired with autopolymerizing acrylic resin (Jet, Clássico, Brazil). Shear bond strength test was performed using an universal testing machine (Instron 4444). Two-way ANOVA and post hoc Tukey’s analysis (p<0,05) were used for statistical comparison. The shear bond strengths of groups G4-OA, G5-OAM and G6-OAA were significantly higher (p<0,05) than that of groups G1-C, G2-M and G3-A. The shear bond strength of Group G3-A were significantly higher (p<0,05) than that of groups G1-C and G2-M. In conclution, chemical treatments in combination with bondig agents showed significant improvements in bond strength without aluminum oxide treatment. More significantly, surface treatment with aluminum oxide particles resulted in the highest bond strength values for acrylic resin teeth repaired with autopolymerizing acrylic resin.

The Effect of Acrylic Surface Preparation on Bonding Denture Teeth to Cellulose Fiber-Reinforced Denture Base Acrylic

“…The research included all examined surface modifications based on surface development so far: Cutting a layer of glazing using a burr [ 9 , 20 , 21 , 22 , 23 ] (group CB_III and CB_#); Sandblasting [ 9 , 11 , 14 , 19 , 20 , 21 , 22 , 23 , 24 , 33 , 34 , 35 , 36 ] (group SB); Using sandpaper [ 37 , 38 , 39 , 40 ] (group SP). …”

“…The connection between the polymerized teeth and the polymerizing acrylic base plate is chemical [ 1 , 2 , 4 , 7 , 8 ]. Dental technicians use various procedures to improve it: Procedures enabling the creation of new chains and/or increasing the over-etching of the tooth’s structure (e.g., through using isobutyl methacrylate [ 9 ], dichloromethane [ 10 ], MMA [ 9 , 11 ], etc. ), ready-made mixes sold as “glues” [ 9 , 12 , 13 , 14 , 15 ]), or rubbing the tooth structure with a selected chemical reagent; Mechanical modification of the surface, wherein technicians create retainers [ 16 , 17 , 18 , 19 ] or develop the surface [ 9 , 14 , 19 , 20 , 21 , 22 , 23 , 24 ]; A combination of the two above methods (which is even suggested by manufacturers [ 15 ]).…”

“…Procedures enabling the creation of new chains and/or increasing the over-etching of the tooth’s structure (e.g., through using isobutyl methacrylate [ 9 ], dichloromethane [ 10 ], MMA [ 9 , 11 ], etc. ), ready-made mixes sold as “glues” [ 9 , 12 , 13 , 14 , 15 ]), or rubbing the tooth structure with a selected chemical reagent;…”

Numerical Analysis of the Bond Strength between Two Methacrylic Polymers by Surface Modification

“…• methyl methacrylate (MMA) [13,14], • ethylene glycol dimethacrylate (EGDMA) [10], • a monomer (i.e., a combination of MMA and EGDMA) [12,[15][16][17][18], • acetone [13,19,20], or • glues [13,19,20] supplied by various manufacturers of acryl (composed primarily of MMA).…”