Effect of Miniaturized Dumbbell-shaped Specimen to Identify Bonding of Bovine Dentin

DOI 9 Citations 23 References
  • ARAO Takefumi
    Division of Organic Materials, Institute for Medical and Dental Engineering, Tokyo Medical and Dental University
  • NAKABAYASHI Nobuo
    Division of Organic Materials, Institute for Medical and Dental Engineering, Tokyo Medical and Dental University

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  • 牛歯ダンベル型接着試料を用いた引張試験の長所

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Abstract

The effectiveness of miniaturized dumbbell-shaped bonded bovine dentin specimens to measure their tensile bond strength was studied.The 4-META/MMA-TBB resin bonded to bovine dentin conditioned with 10-3 for 10, 30 and 60 s, were sectioned and trimmed to the dumbbell specimen with a cross-section of 3.0×2.0 mm at the adhesive interface.The tensil bond strength was 20.5, 16.2, and 12.7MPa, respectively.Fractures due to tensile stress occurred in the remaining demineralized dentin in all three groups.These findings were quite different from those obtained by the conventional bonding test.In conclusion, dumbbell specimens are useful to evaluate bonding quality of resin to dentin in a short period.

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