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Quintessence Publishing: Journals: IJP
The International Journal of Prosthodontics

Edited by George A. Zarb, BChD, DDS, MS, MS, FRCD(C)

ISSN 0893-2174

September/October 2008
Volume 21 , Issue 5

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Short Communication: The Effect of Preparation Design on the Marginal Stress of Resin-Bonded Metal-Free Crowns: A Finite Element Study

Akikazu Shinya, DDS, PhD/Lippo V. J. Lassila, DDS, MSc Eng/Pekka K. Vallittu, DDS, PhD, CDT

Pages: 445447
PMID: 18950069

The aim of this study was to evaluate the stress distribution at the marginal edge of metal-free crowns using 2 different materials (ceramic and hybrid composite) and 4 different preparation designs (knife edge, chamfer, heavy chamfer, rounded shoulder). All marginal preparation designs for hybrid composite crowns showed lower compression and tensile stress than the ceramic crowns. The rounded shoulder preparation provided more even stress distribution than the knife-edge preparation. Heavy chamfer was an acceptable preparation design for ceramic crowns. The chamfer preparation was preferred for hybrid composite crown. Int J Prosthodont 2008;21:445447.

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