Drills
Mostrando 1-12 de 54 artigos, teses e dissertações.
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1. PRODUCTIVITY OF CORN HYBRIDS IN RELATION TO SOWING OVERLAP
ABSTRACT The automatic control of section shut-off in seed drills minimizes seeding overlap and can reduce productivity losses, especially in responsive crops such as corn. In that context, this study evaluated the effect of sowing overlap on the grain yield and productivity of three corn hybrids. A DB-50 precision seed drill, with 33 rows equipped with a 16
Eng. Agríc.. Publicado em: 2020-08
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2. PRESCRIÇÃO E TREINAMENTO DA FORÇA MUSCULAR EM TENISTAS COMPETITIVOS: REVISÃO SISTEMÁTICA
RESUMO A aplicação do treinamento de força muscular tem sido investigada para desenvolvimento das capacidades físicas em modalidades esportivas. Embora a utilização dos métodos de treinamento seja bastante clara, a prescrição da carga externa do treinamento muitas vezes não é esclarecida. O tênis de campo é uma modalidade de grande exigência f�
Rev Bras Med Esporte. Publicado em: 2020-02
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3. Microtensile bond strength of root canal dentin treated with adhesive and fiber-reinforced post systems
Abstract Nowadays, demand for esthetic restorations has risen considerably; thus, nonmetal esthetic posts made of either high-strength ceramics or reinforced resins, such as fiber-reinforced resin posts, have become more and more popular. Important characteristics of fiber-reinforced posts involve a modulus of elasticity similar to dentin and their ability t
Braz. oral res.. Publicado em: 01/07/2019
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4. Efeito da mesogeometria da broca e das condições de lubrirrefrigeração sobre o acabamento do furo em aço ARBL DIN S700MC
RESUMO O trabalho apresenta um estudo sobre os efeitos decorrentes da modificação da mesogeometria de uma broca helicoidal de metal-duro com revestimento de TiAlN sobre o acabamento superficial do aço de alta resistência e baixa liga DIN S700MC utilizando diferentes condições de aplicação de fluidos lubrirrefrigerantes (em abundância, em mínima qua
Matéria (Rio J.). Publicado em: 20/05/2019
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5. Short-Term Audiological Results of Diode Laser in Comparison with Manual Perforation in Stapes Surgery
Abstract Introduction Diode laser is a new alternative in stapes surgery for otosclerosis. The present study is the first to compare the short-term results of the surgery performed using diode laser to those obtained through the conventional fenestration technique. Objective To use audiometry to establish a comparative analysis between the functional res
Int. Arch. Otorhinolaryngol.. Publicado em: 2018-06
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6. Comparative evaluation of push-out bond strength of a MTA-based root canal sealer
AIM: To evaluate the bond strength to root dentin of three root canal sealers: a mineral trioxide aggregate (MTA)-based sealer (MTA Fillapex(r)), an epoxy resin-based sealer (AH Plus(r)), and a zinc oxide eugenol-based sealer (EndoFill(r)). METHODS: Thirty extracted single-root human teeth of similar sizes and circular canals were prepared using #3 and
Braz. J. Oral Sci.. Publicado em: 2014-04
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7. Endodontic filling removal procedure: an ex vivo comparative study between two rotary techniques
In this study, we compared the ex vivo removal capacity of two endodontic rotary techniques and determined whether there was a significant quantitative difference in residual material when comparing root thirds. Forty extracted molars were used. The palatal roots were selected, and the canals were prepared using a step-back technique and filled using a later
Braz. oral res.. Publicado em: 2013-12
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8. Mycological contamination in dental unit waterlines in Istanbul, Turkey
Studies on dental units (DUs) are conducted either for the prevention or the reduction of the density of bacterial contamination in dental unit waterlines (DUWLs). However, the existence of fungi in the these systems requires more attention. During dental treatment, direct contact with water contaminated with fungi such as Candida, Aspergillus, or inhalation
Braz. J. Microbiol.. Publicado em: 2013-09
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9. The sealing ability of MTA apical plugs exposed to a phosphate-buffered saline
OBJECTIVE: The aim of this study was to evaluate the influence of exposure of the mineral trioxide aggregate (MTA) - with and without calcium chloride (CaCl2) - to phosphate-buffered saline (PBS) on the apical microleakage using a glucose leakage system. MATERIAL AND METHODS: Sixty root segments were randomly divided into 4 experimental groups (n=15). Af
J. Appl. Oral Sci.. Publicado em: 2013-07
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10. Effectiveness of different obturation techniques in surpassing the ledge formed in simulated curved canals
AIM: To compare the effectiveness of different obturation techniques in surpassing the ledge formed in simulated curved root canals. METHODS: Eighty acrylic-resin blocks with curved canals were instrumented with Gates-Glidden drills to simulate a ledge formation. Then, a K-File #10 was used for trying to surpass the deviation, and the blocks that permitted s
Braz. J. Oral Sci.. Publicado em: 2013-06
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11. Medição do desgaste de brocas helicoidais de aço rápido por meio do uso de um dispositivo a laser. / Measurement of the consuming of helical fast steel drills by means of the use of a device the laser.
Este trabalho demonstra como o desgaste das brocas helicoidais de aço rápido, pode ser medido por meio da utilização de um dispositivo LASER (Light Amplification by Stimulated Emission of Radiation). Foram realizados ensaios de furação em corpos de prova fabricados com aço 4340, utilizando brocas com diâmetro de 10 mm. A máquina utilizada nos ensaio
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/06/2012
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12. Estudo comparativo de diferentes geometrias de corte em broca de metal duro com canal reto em ferro fundido cinzento / Comparative study of different geometries cut with carbide drill straight flute in grey cast iron
O objetivo deste trabalho é comparar o desempenho de duas diferentes geometrias de brocas de metal duro sem cobertura, com canal reto e refrigeração interna, na furação de ferro fundido cinzento. As geometrias avaliadas nos experimentos foram a geometria de ponta normalizada (normal) e uma geometria desenvolvida chamada de geometria de ponta esférica.
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/06/2011