The effects of firing numbers on the opening total pore volume, translucency parameter and color of dental all-ceramic systems / 华西口腔医学杂志
West China Journal of Stomatology
;
(6): 417-424, 2012.
Article
in Chinese
| WPRIM
| ID: wpr-322368
ABSTRACT
<p><b>OBJECTIVE</b>To evaluate the effects of firing numbers on the total opening pore volume (TPV), translucency parameter (TP) and color of dental all-ceramic systems.</p><p><b>METHODS</b>Specimens of three kinds of all-ceramics systems were made, i.e. heat pressed all-ceramic (IPS Empress II), alumina all-ceramic (In-Cream alumina blanks) and zirconia all-ceramic (Cercon CAD/CAM zirconia). The specimens' TP, lightness (deltaL), chroma (deltaC) and TPV after 1, 3 and 5 firings were measured and calculated by spectrophotometer and surface area/porosity system. The data were analyzed statistically using SAS 8.0 software.</p><p><b>RESULTS</b>There were significant differences in TPV, TP, deltaL and deltaC for all-ceramic specimens at same number of firings (P<0.05), i.e. IPS>alumina and zirconia for TPV (P<0.05); IPS>zirconia>alumina for TP and deltaL (P<0.05); IPS and alumina>zirconia for deltaC (P<0.05). The significant differences also presented in TPV, TP, deltaL and deltaC for a same specimen at different number of firings (P<0.05). With increasing number of firings, TPV decreased, and TP, deltaL and deltaC increased gradually. There were negative linear correlation between number of firings and TPV, TP, deltaL and deltaC (P<0.05).</p><p><b>CONCLUSION</b>Repeated firings will affect TP and deltaL of all-ceramic restorations via the change of TPV.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Zirconium
/
Materials Testing
/
Ceramics
/
Computer-Aided Design
/
Color
/
Dental Porcelain
/
Aluminum Oxide
/
Light
Limits:
Humans
Language:
Chinese
Journal:
West China Journal of Stomatology
Year:
2012
Type:
Article
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