Development of translucent zirconia for dental crown applications

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Zirconia-based dental ceramic is widely used for crown restoration, because of its superior mechanical properties and favorable biocompatibility. However, yttria-stabilized tetragonal zirconia (3YSZ), which is used in most dental crown restorations, has low translucency. This characteristic is unfavorable and results in low aesthetic quality of dental restoration. In this study, translucent 3YSZ dental ceramics were fabricated using nano-sized powder (20 nm) and high-temperature sintering (1500°C). The green bodies were slip casted and consolidated with cold iso-static pressing to create compact bodies. During the slip casting process different amounts of dispersing agent Polyethyleneimine (PEI) (0.2, 0.4, 0.6 and 0.8 wt%), were used to prevent agglomerates and create homogeneous suspensions. A minute amount (0, 0.1, 0.2, 0.3 and 0.4 wt%) of alumina was added into the suspension as sintering aid. The translucency or light transmittance of 3YSZ specimens was measured by an ultraviolet-visible spectrometer. Results showed that the 3YSZ specimen with 0.4 wt% alumina and 0.4 wt% PEI exhibited the highest light transmittance. The specimen also had larger grain size, because of excessive grain growth. The Vickers hardness of the specimens was insignificantly affected by the amount of alumina and PEI addition.

Original languageEnglish
Pages (from-to)342-350
Number of pages9
JournalAsian Journal of Scientific Research
Volume8
Issue number3
DOIs
Publication statusPublished - 2015

Fingerprint

aluminum oxide
transmittance
ceramics
esthetics
hardness
aid
mechanical property
spectrometer
grain size
restoration
sintering
cold
pressing

Keywords

  • Dental ceramics
  • Translucency
  • Yttria-stabilized tetragonal zirconia

ASJC Scopus subject areas

  • General

Cite this

@article{f39efc6442cd4c65ad6d8054a988d658,
title = "Development of translucent zirconia for dental crown applications",
abstract = "Zirconia-based dental ceramic is widely used for crown restoration, because of its superior mechanical properties and favorable biocompatibility. However, yttria-stabilized tetragonal zirconia (3YSZ), which is used in most dental crown restorations, has low translucency. This characteristic is unfavorable and results in low aesthetic quality of dental restoration. In this study, translucent 3YSZ dental ceramics were fabricated using nano-sized powder (20 nm) and high-temperature sintering (1500°C). The green bodies were slip casted and consolidated with cold iso-static pressing to create compact bodies. During the slip casting process different amounts of dispersing agent Polyethyleneimine (PEI) (0.2, 0.4, 0.6 and 0.8 wt{\%}), were used to prevent agglomerates and create homogeneous suspensions. A minute amount (0, 0.1, 0.2, 0.3 and 0.4 wt{\%}) of alumina was added into the suspension as sintering aid. The translucency or light transmittance of 3YSZ specimens was measured by an ultraviolet-visible spectrometer. Results showed that the 3YSZ specimen with 0.4 wt{\%} alumina and 0.4 wt{\%} PEI exhibited the highest light transmittance. The specimen also had larger grain size, because of excessive grain growth. The Vickers hardness of the specimens was insignificantly affected by the amount of alumina and PEI addition.",
keywords = "Dental ceramics, Translucency, Yttria-stabilized tetragonal zirconia",
author = "Theng, {Kai Yuan} and Andanastuti Muchtar and Norziha Yahaya and Ghazali, {Mariyam Jameelah}",
year = "2015",
doi = "10.3923/ajsr.2015.342.350",
language = "English",
volume = "8",
pages = "342--350",
journal = "Asian Journal of Scientific Research",
issn = "1992-1454",
publisher = "Science Alert Journals",
number = "3",

}

TY - JOUR

T1 - Development of translucent zirconia for dental crown applications

AU - Theng, Kai Yuan

AU - Muchtar, Andanastuti

AU - Yahaya, Norziha

AU - Ghazali, Mariyam Jameelah

PY - 2015

Y1 - 2015

N2 - Zirconia-based dental ceramic is widely used for crown restoration, because of its superior mechanical properties and favorable biocompatibility. However, yttria-stabilized tetragonal zirconia (3YSZ), which is used in most dental crown restorations, has low translucency. This characteristic is unfavorable and results in low aesthetic quality of dental restoration. In this study, translucent 3YSZ dental ceramics were fabricated using nano-sized powder (20 nm) and high-temperature sintering (1500°C). The green bodies were slip casted and consolidated with cold iso-static pressing to create compact bodies. During the slip casting process different amounts of dispersing agent Polyethyleneimine (PEI) (0.2, 0.4, 0.6 and 0.8 wt%), were used to prevent agglomerates and create homogeneous suspensions. A minute amount (0, 0.1, 0.2, 0.3 and 0.4 wt%) of alumina was added into the suspension as sintering aid. The translucency or light transmittance of 3YSZ specimens was measured by an ultraviolet-visible spectrometer. Results showed that the 3YSZ specimen with 0.4 wt% alumina and 0.4 wt% PEI exhibited the highest light transmittance. The specimen also had larger grain size, because of excessive grain growth. The Vickers hardness of the specimens was insignificantly affected by the amount of alumina and PEI addition.

AB - Zirconia-based dental ceramic is widely used for crown restoration, because of its superior mechanical properties and favorable biocompatibility. However, yttria-stabilized tetragonal zirconia (3YSZ), which is used in most dental crown restorations, has low translucency. This characteristic is unfavorable and results in low aesthetic quality of dental restoration. In this study, translucent 3YSZ dental ceramics were fabricated using nano-sized powder (20 nm) and high-temperature sintering (1500°C). The green bodies were slip casted and consolidated with cold iso-static pressing to create compact bodies. During the slip casting process different amounts of dispersing agent Polyethyleneimine (PEI) (0.2, 0.4, 0.6 and 0.8 wt%), were used to prevent agglomerates and create homogeneous suspensions. A minute amount (0, 0.1, 0.2, 0.3 and 0.4 wt%) of alumina was added into the suspension as sintering aid. The translucency or light transmittance of 3YSZ specimens was measured by an ultraviolet-visible spectrometer. Results showed that the 3YSZ specimen with 0.4 wt% alumina and 0.4 wt% PEI exhibited the highest light transmittance. The specimen also had larger grain size, because of excessive grain growth. The Vickers hardness of the specimens was insignificantly affected by the amount of alumina and PEI addition.

KW - Dental ceramics

KW - Translucency

KW - Yttria-stabilized tetragonal zirconia

UR - http://www.scopus.com/inward/record.url?scp=84933528162&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84933528162&partnerID=8YFLogxK

U2 - 10.3923/ajsr.2015.342.350

DO - 10.3923/ajsr.2015.342.350

M3 - Article

AN - SCOPUS:84933528162

VL - 8

SP - 342

EP - 350

JO - Asian Journal of Scientific Research

JF - Asian Journal of Scientific Research

SN - 1992-1454

IS - 3

ER -