Refereed journal article or data article (A1)
The effect of staining and vacuum sintering on optical and mechanical properties of partially and fully stabilized monolithic zirconia
List of Authors: Sulaiman TA, Abdulmajeed AA, Donovan TE, Vallittu PK, Narhi TO, Lassila LV
Publisher: JAPANESE SOC DENTAL MATERIALS DEVICES
Publication year: 2015
Journal: Dental Materials Journal
Journal name in source: DENTAL MATERIALS JOURNAL
Journal acronym: DENT MATER J
Volume number: 34
Issue number: 5
Start page: 605
End page: 610
Number of pages: 6
ISSN: 0287-4547
DOI: http://dx.doi.org/10.4012/dmj.2015-054
The effect of staining and vacuum sintering on optical properties and the bi-axial flexural strength of partially and fully stabilized monolithic zirconia (PSZ, FSZ) were evaluated. Disc-shaped specimens divided into three subgroups (n=15): non-stained, stained and non-stained with vacuum sintering. After staining and sintering, optical properties were evaluated using a reflection spectrophotometer and bi-axial flexural strength was tested using the piston-on-three balls technique. Statistical analysis was performed using multivariate analysis of variance (MANOVA) followed by post-hoc Tukey's tests (p<0.05). Staining decreased translucency parameter (TP) values of FSZ (p<0.05). Sintering under vacuum enhanced TP values for PSZ (p<0.05). Staining enhanced surface gloss for both types of zirconia (p<0.05). Staining increased bi-axial flexural strength of FSZ (p<0.05), while it decreased the strength of PSZ (p<0.05). Sintering under vacuum provided minimal benefits with either type of zirconia.
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