Bond strength of acrylic teeth to denture base resin after various surface conditioning methods before and after thermocycling.

Guilherme Saavedra, Luiz Felipe Valandro, Fabiola Pessoa Pereira Leite, Regina Amaral, Mutlu Ozcan, Marco A Bottino, Estevão T Kimpara

Journal: The International journal of prosthodontics 2007;20(2):199-201

PMID: 17455445

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Abstract

This study aimed to evaluate the durability of adhesion between acrylic teeth and denture base acrylic resin. The base surfaces of 24 acrylic teeth were flatted and submitted to 4 surface treatment methods: SM1 (control): No SM; SM2: application of a methyl methacrylate-based bonding agent (Vitacol); SM3: air abrasion with 30-microm silicone oxide plus silane; SM4: SM3 plus SM2. A heat-polymerized acrylic resin was applied to the teeth. Thereafter, bar specimens were produced for the microtensile test at dry and thermocyled conditions (60 days water storage followed by 12,000 cycles). The results showed that bond strength was significantly affected by the SM (P < .0001) (SM4 = SM2 > SM3 > SM1) and storage regimens (P < .0001) (dry > thermocycled). The methyl methacrylate-based adhesive showed the highest bond strength.

Address: São Jose dos Campos Dental School, São Paulo State University, São Jose dos Campos, Brazil.

MeSH Terms: Acrylic Resins, Air Abrasion, Dental, Aluminum Oxide, Dental Bonding, Dental Materials, Dental Polishing, Denture Bases, Humans, Materials Testing, Methylmethacrylate, Silanes, Silicon Dioxide, Stress, Mechanical, Surface Properties, Temperature, Tensile Strength, Tooth, Artificial, Water