نتایج جستجو برای: high speed handpiece.

تعداد نتایج: 2186062  

Journal: :journal of research in medical sciences 0
mahnaz nikaeen department of environmental health engineering, school of public health, isfahan university of medical sciences, isfahan maryam hatamzadeh department of environmental health engineering, school of public health, isfahan university of medical sciences, isfahan, iran zohre sabzevari department of environmental health engineering, school of public health, isfahan university of medical sciences, isfahan, iran omolbanin zareh department of environmental health engineering, school of public health, isfahan university of medical sciences, isfahan, iran

background : dental unit waterlines (duwls) are ideal nvironment for development of microbial biofilms. microbial contamination of water in duwls is thought to be the result of biofilm formation as it could serves as a haven for pathogens. the aim of this study was to assess microbial quality of water in dental unit waterlines of dental units located at the dental school of isfahan university o...

Journal: :journal of lasers in medical sciences 0
horieh moosavi dental material research center, school of dentistry, mashhad university of medical sciences, mashhad, iran sajedeh ghorbanzadeh school of dentistry, mashhad university of medical sciences, mashhad, iran farzaneh ahrari dental research center, school of dentistry, mashhad university of medical sciences, mashhad, iran

introduction: this study investigated the influence of erbium-doped yttrium aluminum garnet (er:yag) laser on microhardness, chemical composition and subsurface morphology of dentin cavity walls. methods: forty sound human premolars were selected and randomly assigned into four groups. class v cavities were prepared either with an er:yag laser (groups 1 and 2; 15 hz, 250 mj for enamel, 10 hz, 2...

Journal: :American Journal of Public Health 1980

2017
MAKHSUDA JURAEVA HWAN PARK JIN RYU DONG JOO SONG

The high-speed dental air-turbine handpieces are widely used in the dentistry as a tool for cutting and drilling a tooth. The advanced existing high-speed dental air-turbine handpieces were investigated to design the high performance dental air-turbine handpiece. The coupler and air-turbine of the dental air-turbine handpiece was designed using computational analysis. The computational domain o...

2009
Mahnaz Nikaeen Maryam Hatamzadeh Zohre Sabzevari Omolbanin Zareh

BACKGROUND Dental unit waterlines (DUWLs) are ideal environment for development of microbial biofilms. Microbial contamination of water in DUWLs is thought to be the result of biofilm formation as it could serves as a haven for pathogens. The aim of this study was to assess microbial quality of water in dental unit waterlines of dental units located at the dental school of Isfahan University of...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه ارومیه 1377

‏‎applications such as high definition viedeo reproduction, portable computers, wireless, and multimedia demand, and ever-increasing need for ligh-frequency high-resolution and low-power analog-to-digital converters. flash, two-step flash, and pipeline convertors are fast but consume large amount of power and require large area. to overcome these problems, successive approximation converter blo...

Journal: :Brazilian oral research 2008
Carlos José Soares Rodrigo Borges Fonseca Henner Alberto Gomide Lourenço Correr-Sobrinho

Several in vitro studies employ the confection of cavity preparations that are difficult to standardize by means of manual high speed handpieces. This study presents the development of a cavity preparation machine designed to standardize in vitro cavity preparations. A metal base of 25 mm x 25 mm x 4 mm (length x width x height) was coupled to a small mobile table which was designed to be able ...

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...

Journal: :Emergency medicine Australasia : EMA 2004
Peter Aquilina Geoffrey McKellar

We present a patient with extensive surgical emphysema following the dental restoration the upper left first molar (tooth 26) with a high speed turbine handpiece. The clinical findings and management of subcutaneous cervical emphysema are discussed.

Journal: :Journal of oral science 2007
Aurea S B Vieira Márcia P A dos Santos Lívia A A Antunes Laura G Primo Lucianne C Maia

The purpose of this study was to compare a high-speed handpiece to an ultrasonic device regarding the time taken for cavity preparation in bovine incisor teeth (n = 12), and to evaluate microleakage after the restorations. Two cylindrical cavities each were prepared on the labial surfaces of 12 teeth. One of them was made with a diamond tip in group 1 (G(1) = 12) coupled with a high-speed handp...

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