Preparation of ultrathin opaque white hydroxyapatite sheets and their aesthetic effects

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  • 超薄ハイドロキシアパタイトシートの作製とその審美効果
  • 超薄ハイニドロキシアパタイトシートの作製とその審美効果
  • チョウハクハイニドロキシアパタイトシート ノ サクセイ ト ソノ シンビ コウカ

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Abstract

Tooth bleaching and laminate veneer restoration methods are widely used in cosmetic dentistry. However, despite their aesthetic appeal, these methods damage tooth enamel, which cannot regenerate, and the adhesive used with laminate veneers can cause an allergic reaction. We are attempting to develop a novel esthetic dentistry sheet that would be applicable to both enamel restoration and cosmetic dentistry. An amorphous calcium phosphate (ACP) sheet was fabricated from low density hydroxyapatite (HAp) using a pulsed laser deposition method. The whiteness level of the sheet increased, as judged from the increase in the number of particles on the sheet surface. The HAp sheet was crystallized using a post-annealing process, and this also increased the whiteness of the sheet compared to an ACP sheet for the growth of a grain boundary introduced into the sheet by crystallization. A change in whiteness of the opaque white sheets according to the Commission Internationale de l’Eclairage (WICIE) masked the discoloration of a human avulsed tooth, as measured using a spectrum colorimeter. The whiteness values increased and the yellow values decreased as the number of overlapping sheets increased, demonstrating that the aesthetic effects of opaque white HAp sheets are very promising in cosmetic dentistry.

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