Materials Flexural Properties Research New Methods

The flexural properties of endodontic post materials.

OBJECTIVES To measure the flexural strengths and moduli of endodontic post materials and to assess the effect on the calculated flexural properties of varying the diameter/length (D/L) ratio of three-point bend test samples. METHODS Three-point bend testing of samples of 2mm diameter metal and fiber-reinforced composite (FRC) rods was carried out and the mechanical properties calculated at su...

Influence of Specimen Preparation and Test Methods on the Flexural Strength Results of Monolithic Zirconia Materials

The aim of this work was to evaluate the influence of specimen preparation and test method on the flexural strength results of monolithic zirconia. Different monolithic zirconia materials (Ceramill Zolid (Amann Girrbach, Koblach, Austria), Zenostar ZrTranslucent (Wieland Dental, Pforzheim, Germany), and DD Bio zx² (Dental Direkt, Spenge, Germany)) were tested with three different methods: 3-poi...

METALLIC AND CERAMIC MATERIALS RESEARCH Task Order 0005: Metallic, Materials, Methods, Characterization and Testing Research

Effects of calcium silicate-based materials on the flexural properties of dentin.

INTRODUCTION Prolonged exposure of root dentin to calcium hydroxide alters the fracture resistance of dentin. Calcium silicate-based materials (CSMs) used in endodontics release calcium hydroxide on setting. This study examined whether prolonged contact of dentin with CSMs adversely affects its mechanical properties. METHODS Dentin beams prepared from extracted human molars (7 × 3 × 0.3 mm) w...

New Species of Nototriton MATERIALS AND METHODS

i^"" I £ DISCUSSION 8 ? == ^ I LITERATURE CITED 8 _ T3 03 00 Z U c 2 ~ o I ^ ^„' ^ u ABSTRACT Three new species of Nototriton are described from eastern Guatemala. All of these ^K o. S « diminutive species of salamanders occur in wet forest in the mountains (875-1150 m) near the Guate^^ (£ ^ g mala-Honduras border. Characteristics of size, proportion, and coloration distinguish these new spe= «...