Damage and reliability of Y-TZP after cementation surface treatment

P. C. Guess, Y. Zhang, J. W. Kim, E. D. Rekow, V. P. Thompson

Research output: Contribution to journalArticlepeer-review


Zirconia-based restorations are widely used in prosthetic dentistry, but their susceptibility to post-sintering cementation surface treatments remains controversial. We hypothesized that grinding (600-grit) and alumina abrasion (50 μm, 5 sec, 0.5 MPa) affect the damage modes and reliability of zirconia core material. Monolithic CAD/CAM-machined and sintered Y-TZP plates (0.5 mm thickness) were adhesively cemented to dentin-like composite substrates. Uni-axial mouth-motion cyclic contact was applied through a tungsten carbide spherical indenter (r = 3.18 mm). Results showed that zirconia core ceramic is vulnerable to lower surface radial fracture after grinding or alumina abrasion, while the as-received control chiefly fractured from load-application surface cone fracture. Significantly lower reliability of ground and alumina-abraded compared with the as-received zirconia core ceramic can be attributed to damage induced on the cementation surface. Clinical relevance concerning surface treatment protocols for zirconia framework materials prior to cementation is addressed.

Original languageEnglish (US)
Pages (from-to)592-596
Number of pages5
JournalJournal of dental research
Issue number6
StatePublished - Jun 2010


  • Cone fracture
  • Fatigue reliability
  • Radial fracture
  • Surface treatment
  • Zirconia framework

ASJC Scopus subject areas

  • General Dentistry


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