Modified Y-TZP core design improves all-ceramic crown reliability

N. R F A Silva, E. A. Bonfante, B. T. Rafferty, R. A. Zavanelli, E. D. Rekow, V. P. Thompson, Paulo Coelho

Research output: Contribution to journalArticle

Abstract

This study tested the hypothesis that all-ceramic core-veneer system crown reliability is improved by modification of the core design. We modeled a tooth preparation by reducing the height of proximal walls by 1.5 mm and the occlusal surface by 2.0 mm. The CAD-based tooth preparation was replicated and positioned in a dental articulator for core and veneer fabrication. Standard (0.5 mm uniform thickness) and modified (2.5 mm height lingual and proximal cervical areas) core designs were produced, followed by the application of veneer porcelain for a total thickness of 1.5 mm. The crowns were cemented to 30-day-aged composite dies and were either single-load-to-failure or step-stress-accelerated fatigue-tested. Use of level probability plots showed significantly higher reliability for the modified core design group. The fatigue fracture modes were veneer chipping not exposing the core for the standard group, and exposing the veneer core interface for the modified group.

Original languageEnglish (US)
Pages (from-to)104-108
Number of pages5
JournalJournal of Dental Research
Volume90
Issue number1
DOIs
StatePublished - Jan 2011

Fingerprint

Tooth Preparation
Ceramics
Crowns
Dental Veneers
Dental Articulators
Dental Porcelain
Stress Fractures
Tongue
Fatigue

Keywords

  • all-ceramic crown
  • core design
  • mechanical testing
  • step-stress fatigue

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

Silva, N. R. F. A., Bonfante, E. A., Rafferty, B. T., Zavanelli, R. A., Rekow, E. D., Thompson, V. P., & Coelho, P. (2011). Modified Y-TZP core design improves all-ceramic crown reliability. Journal of Dental Research, 90(1), 104-108. https://doi.org/10.1177/0022034510384617

Modified Y-TZP core design improves all-ceramic crown reliability. / Silva, N. R F A; Bonfante, E. A.; Rafferty, B. T.; Zavanelli, R. A.; Rekow, E. D.; Thompson, V. P.; Coelho, Paulo.

In: Journal of Dental Research, Vol. 90, No. 1, 01.2011, p. 104-108.

Research output: Contribution to journalArticle

Silva, NRFA, Bonfante, EA, Rafferty, BT, Zavanelli, RA, Rekow, ED, Thompson, VP & Coelho, P 2011, 'Modified Y-TZP core design improves all-ceramic crown reliability', Journal of Dental Research, vol. 90, no. 1, pp. 104-108. https://doi.org/10.1177/0022034510384617
Silva NRFA, Bonfante EA, Rafferty BT, Zavanelli RA, Rekow ED, Thompson VP et al. Modified Y-TZP core design improves all-ceramic crown reliability. Journal of Dental Research. 2011 Jan;90(1):104-108. https://doi.org/10.1177/0022034510384617
Silva, N. R F A ; Bonfante, E. A. ; Rafferty, B. T. ; Zavanelli, R. A. ; Rekow, E. D. ; Thompson, V. P. ; Coelho, Paulo. / Modified Y-TZP core design improves all-ceramic crown reliability. In: Journal of Dental Research. 2011 ; Vol. 90, No. 1. pp. 104-108.
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