Journal article
Strength and translucency of zirconia after high-speed sintering
Journal of esthetic and restorative dentistry, Vol.32(2), pp.219-225
03/01/2020
DOI: 10.1111/jerd.12524
PMID: 31515932
Abstract
Objectives To compare the strength and translucency of CAD/CAM zirconia blocks, with traditional and high-speed sintering, to lithium disilicate. Materials and Methods Three zirconia materials (Katana STML Block, Prettau Anterior, and Zpex Smile) were tested with either traditional (7 hours) or high-speed (18 or 30 minutes in a SpeedFire furnace) sintering. A lithium disilicate material (IPS e.max CAD) was tested as a reference. Three-point bend flexural strength specimens (16 mm x 4 mm x 1.2 mm, n = 10) were tested on 14-mm-separated supports and loaded to failure at 1 mm/min. Specimens (1 mm thick, n = 10) were measured in a Color-i7 spectrophotometer against a black and white background to calculate translucency parameter. Zirconia specimens were thermally etched and a grain structure was observed with scanning electron microscopy. Data were analyzed with 1-way ANOVA and Tukey's post hoc analysis (alpha = 0.05). Results There were significant differences between materials for flexural strength, translucency parameter, and grain size (P < .001). Grains became significantly larger and pores were present when two of the zirconia materials (Prettau Anterior and Zpex Smile) were sintered with a high-speed sintering program. Conclusions Two of the zirconia materials (Prettau Anterior and Zpex Smile) became less translucent and less strong using a high-speed sintering program, whereas another (Katana STML Block) was unaffected.
Details
- Title: Subtitle
- Strength and translucency of zirconia after high-speed sintering
- Creators
- Nathaniel C. Lawson - University of Alabama at BirminghamAnvita Maharishi - University of Alabama at Birmingham
- Resource Type
- Journal article
- Publication Details
- Journal of esthetic and restorative dentistry, Vol.32(2), pp.219-225
- Publisher
- Wiley
- DOI
- 10.1111/jerd.12524
- PMID
- 31515932
- ISSN
- 1496-4155
- eISSN
- 1708-8240
- Number of pages
- 7
- Grant note
- Kuraray Noritake
- Language
- English
- Date published
- 03/01/2020
- Academic Unit
- Family Dentistry
- Record Identifier
- 9984367619802771
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