Machinability of a newly developed pre-sintered zirconia block for dental crown applications

Noor Faeizah Amat, Andanastuti Muchtar, Hsu Zenn Yew, Muhammad Sufiyan Amril, Rahimi L. Muhamud

Research output: Contribution to journalArticle

Abstract

This study aimed to investigate the machinability of zirconia blocks pre-sintered at four different temperatures (900 °C, 1000 °C, 1100 °C, and 1200 °C). Vickers hardness and fracture toughness were measured to obtain the brittleness index (BI) of the zirconia blocks. The shrinkage percentage of the blocks pre-sintered at different temperatures was also determined upon final sintering at 1500 °C. The blocks were then subjected to machining, and the machined surfaces were morphologically analyzed. Although the materials pre-sintered at 900 °C and 1000 °C could be machined, noticeable trace lines and grooves formed on the machined surface due to lack of strength prior to sintering. BI and surface morphology confirmed that the new zirconia block can be milled at a pre-sintering temperature of 1100 °C and can achieve an acceptable shrinkage value for machining upon final sintering.

Original languageEnglish
Article number126996
JournalMaterials Letters
DOIs
Publication statusAccepted/In press - 1 Jan 2019

Fingerprint

Machinability
zirconium oxides
Zirconia
sintering
Sintering
brittleness
Brittleness
shrinkage
machining
Machining
Vickers hardness
toughness
fracture strength
grooves
Temperature
Surface morphology
temperature
Fracture toughness
zirconium oxide

Keywords

  • Bioceramics
  • Brittleness
  • Hardness
  • Machinability
  • Shrinkage
  • Sintering

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Machinability of a newly developed pre-sintered zirconia block for dental crown applications. / Amat, Noor Faeizah; Muchtar, Andanastuti; Yew, Hsu Zenn; Amril, Muhammad Sufiyan; Muhamud, Rahimi L.

In: Materials Letters, 01.01.2019.

Research output: Contribution to journalArticle

Amat, Noor Faeizah ; Muchtar, Andanastuti ; Yew, Hsu Zenn ; Amril, Muhammad Sufiyan ; Muhamud, Rahimi L. / Machinability of a newly developed pre-sintered zirconia block for dental crown applications. In: Materials Letters. 2019.
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AU - Muhamud, Rahimi L.

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