June, 2007, Vol. 9, No. 2

CONTENTS

REVIEWS

The diagnostic process for temporomandibular disorders
35-39

SCIENTIFIC ARTICLES

Growth factors, apoptotic cells and barx1 gene in bone and soft tissue of skeletal class III patients
40-46

Reliability of ARCUSdigma (KaVo®) in diagnosing temporomandibular joint pathology
47-55

Influence of the mechanical properties of composites for indirect dental restorations on pattern failure
56-60

CLINICAL CASE REPORTS

Sarcoidosis (Heerfordt syndrome): A case report
61-64

© 2007 Stomatologija

Stomatologija 2007; 9 (2): 56-60 223 KB

Influence of the mechanical properties of composites for indirect dental restorations on pattern failure

Michel Espinosa Klymus, Rosemary Sadami Arai Shinkai, Eduardo Gonçalves Mota, Hugo Mitsuo Silva Oshima, Ana Maria Spohr, Luiz Henrique Burnett Jr.

Summary

This study evaluated the fracture pattern of four composites for indirect dental restoration relating to three-point flexural strength, compressive strength and modulus of elasticity (Solidex, Artglass, belleGlass, and Targis). Ten specimens of each composite were tested in a universal testing machine at 0.5 mm/min crosshead speed for flexural strength and 1mm/min for compressive strength. Fracture pattern was classified as complete or partial fracture. Modulus of elasticity was calculated from flexural strength data. Composites polymerized under high temperatures (belleGlass and Targis) had higher flexural strength and elastic modulus values than composites polymerized by light (Artglass and Solidex). However, they failed earlier under compression because they were more rigid and showed partial fracture in the material bulk.

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^*Pontifical Catholic University of Rio Grande do Sul, Brazil

Michel Espinosa Klymus^* – DDS, MS, graduate program student
Rosemary Sadami Arai Shinkai^* – DDS, graduate program student
Eduardo Goncalves Mota^* – DDS, MS, PhD, assoc. prof.

Hugo Mitsuo Silva Oshima^* – DDS, MS, PhD, assoc. prof.

Ana Maria Spohr^* – DDS, graduate program student

Luiz Henrique Burnett Jr.^* – DDS, MS, PhD, assoc. prof.

Address correspondence to Eduardo Goncalves Mota, Av. Ipiranga, 6681 - Building 6, Porto Alegre - Rio Grande do Sul, Brazil, ZIP code: 90619-900.
E-mail: eduardo.mota@pucrs.br