Abstract Archives

IADR Abstract Archives

Wear of veneering ceramics on human enamel

Objective : To evaluate the wear of enamel opposing veneering ceramics, gold, emax and zirconia.

Methods :  The study (n=8) includes Lava (zirconia), lithium di-silicate (e.max CAD), gold alloy (Harmony-C&B-55), 3 groups of feldspathetic veneering ceramics (TriLuxe, d.SIGN and VM9) and an enamel (control).  Molar cusps were shaped into a standardized cusp with a tapered diamond (Brasseler/USA), leaving the cusp tips unaltered.  The teeth were mounted into the upper member of the UAB wear machine and stabilized with acrylic resin (Flashcure/Yates). The flat ceramic specimens were mounted parallel to the horizon into holders with an acrylic resin and load cycled in the UAB-chewing simulator (10N vertical load/2mm slide/40cycles/min) for 200,000 cycles. A circulating solution of artificial saliva (33.3% glycerin/66.6 % water) was used as third body media.  PVS impressions (3M ESPE/USA) of each opposing enamel cusp were taken at baseline and 200,000 cycles and poured with vacuum mixed die stone (WhipMix/USA). The stone models were separated from the impression and scanned using a 3D non-contact surface profilometer (Proscan 2000/UK). Scans from baseline enamel and tooth surfaces were compared to scans obtained after 200,000 load cycles and were super-imposed (Proform/UK) to determine volumetric opposing enamel and ceramic loss. Data were analyzed with ANOVA and Tukey-Kramer post-hoc tests (p=0.05).

Results : Groups with different letter in a column are statistically different (p<0.005)

 

 

Opposing enamel

Flat specimen

Volume loss at 200,000 Cycles (mm3)

Lava Zirconia-polished/3M ESPE

0.17±0.04A

 

Undetectable

e.max CAD-polished

Ivoclar Vivadent

0.37±0.05B,C,D

 

0.19±0.05A,B

Gold alloy-Harmony-C&B-55

0.26±0.06A,B

 

0.13±0.02A

d.SIGN

0.4±0.09B,C,D

 

0.28±0.16A,B

TriLuxe

Vita

0.48±0.16D

 

0.31±0.08B

VM 9

0.42±0.09C,D

 

0.19±0.04A,B

Enamel

0.29±0.07B,C

 

0.24±0.06A,B

Conclusions :  Lava polished zirconia followed by gold produced the least opposing enamel and material wear among all the groups.  VM 9, TriLuxe, d.SIGN (veneering porcelains) produced highest opposing enamel wear among all groups (p<.05).


Division: IADR/AADR/CADR General Session
Meeting: 2013 IADR/AADR/CADR General Session (Seattle, Washington)
Location: Seattle, Washington
Year: 2013
Final Presentation ID: 1901
Abstract Category|Abstract Category(s): Dental Materials 3: Ceramic-based Materials and Cements
Authors
  • Kwon, Sodam  ( School of Arts and Sciences, University of Alabama at Birmingham, Birmingham, AL, USA )
  • Janyavula, Sridhar  ( School of Dentistry, University of Alabama at Birmingham, Birmingham, AL, USA )
  • Cakir, Deniz  ( School of Dentistry, University of Alabama at Birmingham, Birmingham, AL, USA )
  • Beck, Preston  ( School of Dentistry, University of Alabama at Birmingham, Birmingham, AL, USA )
  • Ramp, Lance C.  ( School of Dentistry, University of Alabama at Birmingham, Birmingham, AL, USA )
  • Mclaren, Edward  ( UCLA School of Dentistry, Los Angeles, CA, USA )
  • Burgess, John  ( School of Dentistry, University of Alabama at Birmingham, Birmingham, AL, USA )
    • SESSION INFORMATION
    Poster Session
    Fracture, Fatigue, and Wear of Ceramics and Glass-ceramics
    03/22/2013