Influence of Long-term Water Storage and Thermocycling on Shear Bond Strength of Glass-ionomer Cement to Er:YAG Laser-prepared Dentin

Autor(es)

Colucci, Vivian ^[1] ; de Arauijo Loiola, Ana Barbara ^[1] ; da Motta, Daniela Segura ^[1] ; Botelho do Amaral, Flavia Lucisano ^[2] ; Pecora, Jesus Djalma ^[1] ; Milori Corona, Silmara Aparecida ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Ribeirao Preto Sch Dent, Dept Operat Dent, Sao Paulo - Brazil

^[2] Sao Leopoldo Mand Sch Dent & Res & Ctr Inst, Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Adhesive Dentistry; v. 16, n. 1, p. 35-39, 2014.
• Citações Web of Science: 3

Resumo

Purpose: To evaluate the influence of long-term water storage and thermocycling on the shear bond strength of a glass-ionomer cement to Er:YAG-irradiated and bur-prepared dentin. Materials and Methods: Fifteen bovine incisors were selected and the roots removed. Crowns were sectioned into four pieces, resulting in 60 samples that were individually embedded in polyester resin (n = 15) and ground to plane the enamel and expose the dentin. The bonding site was delimited and samples were randomly assigned according to the method of cavity preparation: Er:YAG laser (250 mJ/4 Hz) or high-speed handpiece (diamond bur \#2096). Samples were fixed to a metallic device, where glass-ionomer cement (GIC) cylinders were prepared. Subsequently, they were subdivided according to the duration of water storage (WS) and number of thermocycles (TCs) - 24 h WS/no TCs and 6 months WS/12,000 TCs and subjected to a shear bond strength test (500 N at 0.5 mm/min). Results: The duration of water storage and number of thermocycles tested had no statistically significant effect on the shear bond strength to laser-irradiated dentin (p > 0.05). For bur-prepared substrate, the long-term degradation process promoted a decrease in shear bond strength values (p < 0.05). Conclusion: Long-term water storage and thermocycling did not affect shear bond strength of glass-ionomer cement bonded to Er:YAG laser-prepared dentin. (AU)

• Processo FAPESP: 07/02969-8 - Avaliação in vitro da resistência ao cisalhamento do cimento de ionômero de vidro à dentina irradiada com laser Er:YAG: influência da degradação da interface adesiva
• Beneficiário: Daniela Segura da Motta
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica