Adhesive Strength between Flexible Hydroxyapatite Sheet and Tooth Enamel

Ei Yamamoto; Nobuhiro Kato; Hiroaki Nishikawa; Masanobu Kusunoki; Takashi Hayami; Kazushi Yoshikawa; Shigeki Hontsu

doi:10.4028/www.scientific.net/KEM.529-530.522

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 529-530Adhesive Strength between Flexible Hydroxyapatite...

Adhesive Strength between Flexible Hydroxyapatite Sheet and Tooth Enamel

Abstract:

Tooth enamel cannot be reconstructed once it is destroyed immoderately. Hydroxyapatite (HAp) thin sheet can potentially be used for a novel dental biomaterial to repair the enamel. Using a pulsed laser deposition (PLD) method, we have successfully created a flexible HAp sheet of less than a few micrometers in thickness. Due to its flexibility, the HAp sheet is tightly adhered on curved surfaces at the target site. In the present study, we newly developed double-layered sheets composed of HAp film coated with tricalcium phosphate (TCP) thin layer. The HAp/TCP sheet was adhered to the extracted human teeth using a calcium phosphate solution for 3 days. The adhesive strength between the HAp/TCP sheet and tooth enamel was evaluated by quasi-static tensile tests. Moreover, the interface structure between them was observed by a scanning electron microscopy. As a result of the mechanical evaluation, the adhesive strength was greater than approximately 2.5 MPa. The electron microscopic observation revealed that the sheet was partially fused with the enamel. These findings suggest the possibility that enamel defects are repaired using the HAp/TCP sheet for a short duration.

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Periodical:

Key Engineering Materials (Volumes 529-530)

Pages:

522-525

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.529-530.522

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Online since:

November 2012

Authors:

Ei Yamamoto, Nobuhiro Kato, Hiroaki Nishikawa, Masanobu Kusunoki, Takashi Hayami, Kazushi Yoshikawa, Shigeki Hontsu

Keywords:

Adhesive Strength, Artificial Enamel, Hydroxyapatite Sheet, Pulsed Laser Deposition (PLD), Tricalcium Phosphate

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