Controlled in Vivo Nacre Formation in Flat Pearls with Hydroxyapatite Bioceramic Nuclei

Norio Wada, Naohiro Horiuchi, Kohei Ohta, Shintaro Urasaki, Kohei Yamauchi, Kimihiro Yamashita

Research output: Contribution to journalArticle

Abstract

We carried out in vivo experiments of cultured flat pearl production using disc-like hydroxyapatite (HAp) bioceramics as a nucleus, with and without electric polarization treatment, and evaluated the effects of electric polarization and the quality of HAp materials on flat pearl formation. The thickness of the lamellar structures of the nacreous aragonite layers increased when polarized HAp pellets, instead of nonpolarized HAp pellets, as the nucleus, were used as the nuclei, while the thickness of the columnar structures of the prismatic calcite layers decreased. These phenomena were observed remarkably on the negative potential surface of the polarized HAp pellet. The electric polarization treatment promoted the formation rate of the nacreous lamella structure. It was speculated that electric polarization may control the physiological actions of mantle tissue and regulate the formation of the prismatic calcite and nacreous aragonite layers. The polarization treatment leads to an interference color with a long wavelength. It was found that flat pearls were superior analogues of the original cultured sphere pearls, regardless of the use of nonpolarized or polarized pellets as the nucleus, and that HAp bioceramics are excellent candidates for use as the nucleus of cultured pearls.

Original languageEnglish
Pages (from-to)167-173
Number of pages7
JournalCrystal Growth and Design
Volume16
Issue number1
DOIs
Publication statusPublished - Jan 6 2016

Fingerprint

Nacre
Bioceramics
Durapatite
Hydroxyapatite
pellets
Calcium Carbonate
nuclei
Polarization
polarization
aragonite
calcite
Calcite
lamella
Lamellar structures
Surface potential
Earth mantle
analogs
interference
color
Tissue

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Controlled in Vivo Nacre Formation in Flat Pearls with Hydroxyapatite Bioceramic Nuclei. / Wada, Norio; Horiuchi, Naohiro; Ohta, Kohei; Urasaki, Shintaro; Yamauchi, Kohei; Yamashita, Kimihiro.

In: Crystal Growth and Design, Vol. 16, No. 1, 06.01.2016, p. 167-173.

Research output: Contribution to journalArticle

Wada, Norio ; Horiuchi, Naohiro ; Ohta, Kohei ; Urasaki, Shintaro ; Yamauchi, Kohei ; Yamashita, Kimihiro. / Controlled in Vivo Nacre Formation in Flat Pearls with Hydroxyapatite Bioceramic Nuclei. In: Crystal Growth and Design. 2016 ; Vol. 16, No. 1. pp. 167-173.
@article{b9308680001d4feabf16a53f606c9be2,
title = "Controlled in Vivo Nacre Formation in Flat Pearls with Hydroxyapatite Bioceramic Nuclei",
abstract = "We carried out in vivo experiments of cultured flat pearl production using disc-like hydroxyapatite (HAp) bioceramics as a nucleus, with and without electric polarization treatment, and evaluated the effects of electric polarization and the quality of HAp materials on flat pearl formation. The thickness of the lamellar structures of the nacreous aragonite layers increased when polarized HAp pellets, instead of nonpolarized HAp pellets, as the nucleus, were used as the nuclei, while the thickness of the columnar structures of the prismatic calcite layers decreased. These phenomena were observed remarkably on the negative potential surface of the polarized HAp pellet. The electric polarization treatment promoted the formation rate of the nacreous lamella structure. It was speculated that electric polarization may control the physiological actions of mantle tissue and regulate the formation of the prismatic calcite and nacreous aragonite layers. The polarization treatment leads to an interference color with a long wavelength. It was found that flat pearls were superior analogues of the original cultured sphere pearls, regardless of the use of nonpolarized or polarized pellets as the nucleus, and that HAp bioceramics are excellent candidates for use as the nucleus of cultured pearls.",
author = "Norio Wada and Naohiro Horiuchi and Kohei Ohta and Shintaro Urasaki and Kohei Yamauchi and Kimihiro Yamashita",
year = "2016",
month = "1",
day = "6",
doi = "10.1021/acs.cgd.5b01074",
language = "English",
volume = "16",
pages = "167--173",
journal = "Crystal Growth and Design",
issn = "1528-7483",
publisher = "American Chemical Society",
number = "1",

}

TY - JOUR

T1 - Controlled in Vivo Nacre Formation in Flat Pearls with Hydroxyapatite Bioceramic Nuclei

AU - Wada, Norio

AU - Horiuchi, Naohiro

AU - Ohta, Kohei

AU - Urasaki, Shintaro

AU - Yamauchi, Kohei

AU - Yamashita, Kimihiro

PY - 2016/1/6

Y1 - 2016/1/6

N2 - We carried out in vivo experiments of cultured flat pearl production using disc-like hydroxyapatite (HAp) bioceramics as a nucleus, with and without electric polarization treatment, and evaluated the effects of electric polarization and the quality of HAp materials on flat pearl formation. The thickness of the lamellar structures of the nacreous aragonite layers increased when polarized HAp pellets, instead of nonpolarized HAp pellets, as the nucleus, were used as the nuclei, while the thickness of the columnar structures of the prismatic calcite layers decreased. These phenomena were observed remarkably on the negative potential surface of the polarized HAp pellet. The electric polarization treatment promoted the formation rate of the nacreous lamella structure. It was speculated that electric polarization may control the physiological actions of mantle tissue and regulate the formation of the prismatic calcite and nacreous aragonite layers. The polarization treatment leads to an interference color with a long wavelength. It was found that flat pearls were superior analogues of the original cultured sphere pearls, regardless of the use of nonpolarized or polarized pellets as the nucleus, and that HAp bioceramics are excellent candidates for use as the nucleus of cultured pearls.

AB - We carried out in vivo experiments of cultured flat pearl production using disc-like hydroxyapatite (HAp) bioceramics as a nucleus, with and without electric polarization treatment, and evaluated the effects of electric polarization and the quality of HAp materials on flat pearl formation. The thickness of the lamellar structures of the nacreous aragonite layers increased when polarized HAp pellets, instead of nonpolarized HAp pellets, as the nucleus, were used as the nuclei, while the thickness of the columnar structures of the prismatic calcite layers decreased. These phenomena were observed remarkably on the negative potential surface of the polarized HAp pellet. The electric polarization treatment promoted the formation rate of the nacreous lamella structure. It was speculated that electric polarization may control the physiological actions of mantle tissue and regulate the formation of the prismatic calcite and nacreous aragonite layers. The polarization treatment leads to an interference color with a long wavelength. It was found that flat pearls were superior analogues of the original cultured sphere pearls, regardless of the use of nonpolarized or polarized pellets as the nucleus, and that HAp bioceramics are excellent candidates for use as the nucleus of cultured pearls.

UR - http://www.scopus.com/inward/record.url?scp=84954041290&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84954041290&partnerID=8YFLogxK

U2 - 10.1021/acs.cgd.5b01074

DO - 10.1021/acs.cgd.5b01074

M3 - Article

VL - 16

SP - 167

EP - 173

JO - Crystal Growth and Design

JF - Crystal Growth and Design

SN - 1528-7483

IS - 1

ER -