نتایج جستجو برای: flexural properties

تعداد نتایج: 875188  

2016
Víctor Alonso de la Peña Iria L Darriba Martín Caserío Valea Francisco Guitián Rivera

PURPOSE The aim of this in vitro study was to evaluate the mechanical properties (bending strength and hardness) of seven different fiber reinforced composite posts, in relation to their microstructural characteristics. MATERIALS AND METHODS Two hundred eighty posts were divided into seven groups of 40, one group for each type of post analyzed. Within each group, 15 posts were subjected to th...

Journal: :Journal of the mechanical behavior of biomedical materials 2016
Jun Luo Ingrid Ajaxon Maria Pau Ginebra Håkan Engqvist Cecilia Persson

Calcium phosphate cements (CPCs) are widely used in bone repair. Currently there are two main types of CPCs, brushite and apatite. The aim of this project was to evaluate the mechanical properties of particularly promising experimental brushite and apatite formulations in comparison to commercially available brushite- and apatite-based cements (chronOS(™) Inject and Norian(®) SRS(®), respective...

Journal: :international journal of civil engineering 0
m.m. kamal menoufia university m.a. safan menoufia university z.a. etman menoufia university m.a. abd-elbaki menoufia university

the current research intends to study the possibility of producing fiber recycled self-compacting concrete (frscc) using demolitions as a coarse aggregate (crushed red brick and crushed ceramic). steel fibers were used in recycled self-compacting concrete (rscc) to improve fresh and hardened properties of this type of concrete. thirty nine concrete mixes were prepared to achieve the aim propose...

2013
Altug Cilingir Hakan Bilhan Onur Geckili Tonguc Sulun Ergun Bozdag Emin Sunbuloglu

PURPOSE The purpose of this in vitro study was to investigate the flexural properties of a recently introduced urethane dimethacrylate denture base material (Eclipse) after being repaired with two different materials. MATERIALS AND METHODS Two repair groups and a control group consisting of 10 specimens each were generated. The ES group was repaired with auto-polymerizing polymer. The EE grou...

Journal: :Brazilian dental journal 2010
Ufuk Işerı Zeynep Ozkurt Ender Kazazoğlu Davut Küçükoğlu

The surface of zirconia may be damaged during grinding, influencing the mechanical properties of the material. The purpose of this study was to compare the flexural strength of zirconia after different grinding procedures. Twenty bar-type zirconia specimens (21 x 5 x 2 mm) were divided into 4 groups and ground using a high-speed handpiece or a low-speed straight handpiece until the bars were re...

2016
S. Mohammed Shafeeq S. Karthikeyan Subash M. Reddy Suma Karthigeyan R. Manikandan Arthiie Thangavelu

AIMS To evaluate and compare the flexural strength and impact strength of conventional and microwave cured denture base resins before and after repeated sterilization using microwave energy to consider microwave curing as an alternative to the conventional method of sterilization. MATERIALS AND METHODS The conventional heat cure acrylic resin (DPI heat cure material) Group A and microwave-pol...

Journal: :Journal of the mechanical behavior of biomedical materials 2011
Tomohiro Kawaguchi Lippo V J Lassila Ai Tokue Yutaka Takahashi Pekka K Vallittu

OBJECTIVES Denture base polymers are multiphase polymers made of polymethyl(methacrylate) (PMMA) beads and monomers containing methylmethacrylate and cross-linking agent. The cross-linking agent is typically dimethacrylate but methacrylated dendrimers have been tested. The aim of this study was to investigate the influence of the molecular weight of the PMMA beads on the mechanical properties o...

Journal: :international journal of civil engineering 0
m. l. li nano-structural materials center, school of materials science and engineering, street of xiao ling wei 200, nanjing 210009,jiang su province, china q. chun-xiang east of ji yin da dao, jiangning,nanjing 211189, z. yong-hao nano-structural materials center, school of materials science and engineering,street of xiao ling wei 200, nanjing 210009,jiang su province, china

it introduced an innovative bioengineering method of consolidating incompact sand by urea-hydrolysis producing calcite cementation under the inducement of urease producing microbe. in the paper it discussed the effects of cementation methods and time on porosity and mechanical properties of microbe-inspired cementing sand columns. method a adopted reaction fluid gravitational permeating and ext...

2016
S. Selvam

In the present work, novel Ultra-high molecular weight polyethylene (UHMWPE) composites reinforced with 3wt. %, 6wt. %, 9wt. %, 12wt. % and 15wt. % PEEK particles are fabricated by using hot compression moulding technique and mechanical properties are investigated. Experiments were conducted as per ASTM standards to evaluate the properties of tensile, flexural, impact, and microhardness. The re...

2009
Tatiana Ramirez Cunha Romulo Rocha Regis Marília Rodrigues Bonatti Raphael Freitas de Souza

Fluorinated denture base acrylic resins can present more stable physical properties when compared with conventional polymers. This study evaluated the incorporation of a fluoroalkyl methacrylate (FMA) mixture in a denture base material and its effect on roughness and flexural strength. A swelling behavior assessment of acrylic resin specimens (n=3, per substance) after 12 h of FMA or methyl met...

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