PMID: 3213439Oct 1, 1988Paper

Flexural strength and internal defects of some dental porcelains

Acta Odontologica Scandinavica
G Oilo

Abstract

The flexural strength, number (n), size, and form of pores in seven different dental porcelains were examined. The flexural strength was approximately 100 MPa for the core materials for metal bonding, 116 MPa for traditional alumina porcelains (NBK 1000, Vitadur N), 150 MPa for two new high-alumina porcelains (Vita Hi Ceram, Cerestore), and 240 MPa for a castable glass (Dicor). The mean pore diameter was approximately 10 microns in all porcelains except Dicor, but with a large and varying range. Dicor showed a mean pore size of 1 micron. The pore density varied from 36.5/mm2 in one of the porcelains for metal bonding to 4367/mm2 in Cerestore. The mean cross-sectional area occupied by pores was below 10% for most porcelains except Vitadur N and Cerestore, showing 17.5% and 32.5%, respectively. No correlation was found between flexural strength and frequency or cross-sectional area of pores of the various products.

References

Jan 7, 1975·British Dental Journal·D W Jones, H J Wilson
Apr 1, 1986·Dental Materials : Official Publication of the Academy of Dental Materials·R MorenaC W Fairhurst

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Citations

Feb 11, 2011·Journal of Applied Oral Science : Revista FOB·Bandar Mohammed Abdullah Al-MakramaniMohamed Ibrahim Abu-Hassan
May 3, 2011·The Journal of Prosthetic Dentistry·Alejandro Pelaez-VargasFernando J Monteiro
Jul 1, 1996·The Journal of Prosthetic Dentistry·S A al-ShehriC A Wilson
Feb 1, 1991·Journal of Dentistry·P F MesserC H Lloyd
Oct 1, 1990·Journal of Dentistry·V Piddock, A J Qualtrough
Feb 1, 1990·Journal of Dentistry·R van NoortN E Waters
Aug 23, 2005·Journal of Dentistry·Soheila Etemadi, Roger J Smales
Oct 10, 2006·Operative Dentistry·Roberta Miwa Caldart SasaharaHumberto Naoyuki Yoshimura
Feb 1, 1995·Australian Dental Journal·M Tuntiprawon, P R Wilson
Mar 1, 1991·Journal of Dental Research·R R SeghiP Bauer
Aug 29, 1998·Journal of Oral Rehabilitation·M I Abu-HassanA Harrison
Feb 1, 1992·Endodontics & Dental Traumatology·F M AndreasenE C Munksgaard
Dec 1, 1991·Scandinavian Journal of Dental Research·K KvamG Oilo
Feb 18, 2003·Journal of Oral Rehabilitation·M Ozcan
Oct 1, 1990·Acta Odontologica Scandinavica·C Bessing, M Molin
Feb 1, 1993·Acta Odontologica Scandinavica·M Andersson, A Odén
Nov 6, 2020·Journal of Pharmacy & Bioallied Sciences·Sanath K ShettyMohammed S Hasan
Aug 29, 2000·Journal of Dentistry·J TinschertK J Anusavice

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