Cleaning Methods for Zirconia Following Salivary Contamination

Pattarika Angkasith, John O. Burgess, Marco C. Bottino, Nathaniel C. Lawson

Research output: Contribution to journalArticle

12 Scopus citations


Purpose: To determine the best method of cleaning saliva-contaminated zirconia in preparation for resin bonding. Material and Methods: Flat blocks of zirconia were particle abraded with aluminum oxide and divided into eight groups (n = 10). Groups 1 to 4 were first treated with one coat of an MDP primer (Z-prime Plus) and groups 5 to 8 were left untreated. A thin coat of fresh whole saliva was painted on all specimens (except the control, group 1) and left in contact for 3 minutes. The specimens were then cleaned by rinsing with water for 20 seconds (groups 2 and 5), or cleaned with 35% phosphoric acid for 20 seconds and rinsed (groups 3 and 6), or cleaned with a zirconia cleaning solution (Ivoclean) for 20 seconds and rinsed (groups 4 and 7), or abraded with aluminum oxide particles and rinsed (group 5). Following the cleaning procedure, groups 5 to 8 were treated with one coat of Z-prime Plus. A 2.5 mm diameter tube was filled with composite (Z100), affixed to the zirconia surface, and light-cured. Specimens were stored in water (37°C for 24 hours) followed by thermocycling (5°C to 55°C for 10,000 cycles). Shear bond strength testing was performed at a crosshead speed of 1 mm/min. Bond strength values were compared to the control using a Dunnett's test (alpha = 0.05). Contact angles of the zirconia specimens with and without Z-prime Plus were measured with water using a goniometer. Results: Groups 2, 5, and 8 were not significantly different from the control. Application of Z-prime made the zirconia surface more hydrophobic. Conclusions: If salivary contamination occurs after MDP application, rinsing off the saliva with water will preserve bond strength.

Original languageEnglish (US)
JournalJournal of Prosthodontics
StateAccepted/In press - 2016
Externally publishedYes


  • Ivoclean
  • MDP
  • Phosphoric acid
  • Saliva contamination
  • Zirconia

ASJC Scopus subject areas

  • Dentistry(all)

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  • Cite this

    Angkasith, P., Burgess, J. O., Bottino, M. C., & Lawson, N. C. (Accepted/In press). Cleaning Methods for Zirconia Following Salivary Contamination. Journal of Prosthodontics.