PMID- 27445089
OWN - NLM
STAT- MEDLINE
DCOM- 20180326
LR  - 20181202
IS  - 2049-3169 (Electronic)
IS  - 1674-2818 (Print)
IS  - 1674-2818 (Linking)
VI  - 8
IP  - 3
DP  - 2016 Sep 29
TI  - Effect of liner and porcelain application on zirconia surface structure and 
      composition.
PG  - 164-71
LID - 10.1038/ijos.2016.20 [doi]
AB  - The purpose of this study was to determine if there is an effect of liner and 
      porcelain application (layering and pressing techniques) on the surface of 
      yttria-stabilized tetragonal zirconia polycrystals (Y-TZP), which were exposed to 
      permutations of liner, layered porcelain, and pressed porcelain. Scanning 
      electron microscope (SEM)/energy dispersive spectroscope (EDS) was used to 
      identify changes in composition and microstructure after removing liner and 
      porcelain with hydrofluoric acid. Simulated aging was also conducted to determine 
      the effect of liner and porcelain on low-temperature degradation. The control 
      group had a typical equiaxed grain structure, referred to as unaffected. When 
      covered with liner or porcelain, some areas changed in structure and composition 
      and were termed affected. The frequency of affected structure decreased when 
      liner was covered with either layered porcelain or pressed porcelain. There were 
      statistical differences (P<0.05) in the composition between affected and 
      unaffected for zirconium (layered porcelain with liner: affected=60% (0.8%) 
      (m/m), unaffected=69% (4%), layered porcelain without liner: affected=59% (3%), 
      unaffected=65% (3%)) and oxygen (layered porcelain with liner: affected=35% (2%), 
      unaffected=26% (4%), layered porcelain without liner: affected=35% (3%), 
      unaffected=30% (2%)). However, there were statistical differences (P<0.05) in the 
      composition for zirconium and oxygen of the aged layered porcelain without liner 
      only. The liner should not be used before porcelain application, especially when 
      using the layering technique for zirconia restorations. Furthermore, pressing 
      should be considered the technique of choice over layering.
FAU - Alghazzawi, Tariq F
AU  - Alghazzawi TF
AD  - Department of Prosthetic Dental Sciences, College of Dentistry, Taibah 
      University, Madina, Kingdom of Saudi Arabia.
AD  - Department of Materials Science and Engineering, School of Engineering, The 
      University of Alabama at Birmingham, Birmingham, USA.
FAU - Janowski, Gregg M
AU  - Janowski GM
AD  - Department of Materials Science and Engineering, School of Engineering, The 
      University of Alabama at Birmingham, Birmingham, USA.
LA  - eng
PT  - Journal Article
DEP - 20160929
PL  - India
TA  - Int J Oral Sci
JT  - International journal of oral science
JID - 101504351
RN  - 12001-21-7 (Dental Porcelain)
RN  - 58784XQC3Y (Yttrium)
RN  - C6V6S92N3C (Zirconium)
RN  - S38N85C5G0 (zirconium oxide)
SB  - IM
MH  - *Dental Porcelain
MH  - Dental Stress Analysis
MH  - Dental Veneers
MH  - Materials Testing
MH  - Microscopy, Electron, Scanning
MH  - Surface Properties
MH  - Yttrium
MH  - *Zirconium
PMC - PMC5113090
EDAT- 2016/07/23 06:00
MHDA- 2018/03/27 06:00
PMCR- 2016/09/01
CRDT- 2016/07/23 06:00
PHST- 2016/03/25 00:00 [accepted]
PHST- 2016/07/23 06:00 [entrez]
PHST- 2016/07/23 06:00 [pubmed]
PHST- 2018/03/27 06:00 [medline]
PHST- 2016/09/01 00:00 [pmc-release]
AID - ijos201620 [pii]
AID - 10.1038/ijos.2016.20 [doi]
PST - epublish
SO  - Int J Oral Sci. 2016 Sep 29;8(3):164-71. doi: 10.1038/ijos.2016.20.