European Journal of Prosthodontics and Restorative Dentistry

cover art

Cover Date:
March 2017
Print ISSN:
0965-7452
Electronic ISSN:
2396-8893
Vol:
25
Issue:
1

Can Cleansing Regimens Effectively Eliminate Saliva Contamination from Lithium Disilicate Ceramic Surface?

ABSTRACT
This study evaluated the effect of cleaning protocols on the bond strength of resin cement to glass-ceramic. Ceramic specimens (N=120, n=12 per group) were etched with hydrofluoric acid and rinsed with water. After saliva contamination, specimens were cleaned as follows: water, 37% H3PO4, cleaning-paste (Ivoclean), or isopropanol. Noncontaminated specimens acted as the control. Resin cement was bonded to the specimens, and tested either after 24 h or x5000 thermocycling. Both the cleaning method (p=0.001) and the storage conditions (p=0.005) significantly affected the bond strength results. In dry conditions, the groups PA and IV showed no significant difference, being also similar to the non-saliva contaminated control group (p>0.05). In dry conditions, no significant difference was observed between the mean DW and IS being significantly lower than those of other groups (p<0.05). Except for the group IV, thermocycling decreased the results significantly in all groups (p<0.05). Predominantly mixed failure type was observed in both dry and aged conditions. SEM micrographs of ceramic surfaces after cleaning agents showed no major differences but on the specimens from the IV group, small, rounded-zirconia particles were observed. In case of saliva contamination of acid-etched glass-ceramics, mechanical cleaning can restore adhesion to the baseline situation.

Keywords
Bond Strength
Adhesion
Resin Cement
Ceramic
Hydrofluoric Acid
Cleaning Protocol

10.1922/EJPRD_1605Borges06

Article Price
£15.00
Institution Article Price
£
Page Start
9
Page End
14
Authors
Dr Alexandre L. S. Borges, Dr Sumana Posritong, Mutlu Özcan, Dr Fernanda Campos, Renata Melo, Dr Marco C Bottino

Articles from this issue

  • Title
  • Pg. Start
  • Pg. End

  1. Multiple Adhesive Layering Influence on Dentin Bonding and Permeability
  2. 2
  3. 8

  1. Can Cleansing Regimens Effectively Eliminate Saliva Contamination from Lithium Disilicate Ceramic Surface?
  2. 9
  3. 14

  1. The Effect of Lithium Disilicate Opacity on Polymerization of a DualCured Resin Cement
  2. 15
  3. 19

  1. Marginal Accuracy and Internal Fit of Dental Copings Fabricated by Modern Additive and Subtractive Digital Technologies
  2. 20
  3. 25

  1. Outcomes of Immediate Function Implant Prosthetic Restorations with Mechanical Complications: A Retrospective Clinical Study with 5 Years of Follow-Up
  2. 26
  3. 34

  1. A randomised controlled trial of a nanofilled composite at three years: Did selective enamel etching have an effect?
  2. 35
  3. 41

  1. A Cross-Sectional Survey on Reasons for Initial Placement and Replacement of Single Crowns
  2. 42
  3. 48

  1. Treatment Outcomes and Assessment of Oral Health Related Quality of Life in Treated Hypodontia Patients
  2. 49
  3. 56

  1. Zirconia-Reinforced Lithium Silicate Ceramic - A 2-Year Follow-up of a Clinical Experience with Anterior Crowns
  2. 57
  3. 63