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Resistance to fracture of metal ceramic and all-ceramic crowns.

Authors
  • Castellani, D
  • Baccetti, T
  • Giovannoni, A
  • Bernardini, U D
Type
Published Article
Journal
The International journal of prosthodontics
Publication Date
Jan 01, 1994
Volume
7
Issue
2
Pages
149–154
Identifiers
PMID: 8003195
Source
Medline
License
Unknown

Abstract

This study evaluated the fracture resistance of three types of all-ceramic crowns and compared these to the fracture values of metal ceramics. Uniform metal ceramic specimens; veneered, cast glass-ceramic; and porcelain fused to two different dispersion-strengthened ceramic cores (Hi-Ceram and In-Ceram) were investigated. The metal ceramic specimens demonstrated a significantly higher resistance to fracture than did the Hi-Ceram or veneered glass-ceramic units but did not significantly differ from the In-Ceram specimens. The metal ceramic crowns showed cracks only in the ceramic layer, whereas the all-ceramic specimens underwent global fracture.

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