2000
DOI: 10.1590/s1517-74912000000200012
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Resistência à torção de dois instrumentos endodônticos rotatórios de níquel-titânio

Abstract: Os autores compararam a resistência à torção entre os instrumentos rotatórios de níquel-titânio Quantec Series 2000 e Pow-R, valendo-se de quarenta instrumentos para cada marca divididos em oito para cada um dos seguintes tamanhos nº 15, nº 20, nº 25, nº 35 e nº 40 com 21 mm e conicidade .02. Com a ajuda de um troptômetro modificado cada instrumento foi fixado em um madril e preso à 3 mm de sua ponta, previamente marcada com uma caneta de tinta permanente, na base do aparelho por uma morsa. Em seguida ativou-s… Show more

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Cited by 5 publications
(2 citation statements)
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“…Thus, when activated, the instrument does not make a thread; therefore it does not stick to the canal walls, diminishing the risk of instrument fracture, because it has a less aggressive cut,[20] which possibly reduces its cutting power, as it presents the lowest cutting efficiency among the studied instruments.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…Thus, when activated, the instrument does not make a thread; therefore it does not stick to the canal walls, diminishing the risk of instrument fracture, because it has a less aggressive cut,[20] which possibly reduces its cutting power, as it presents the lowest cutting efficiency among the studied instruments.…”
Section: Discussionmentioning
confidence: 99%
“…Quantec instruments have two cutting blades and a helical angle combined with spaces created in the instrument, which progressively increase as they withdraw from the cutting edge, creating a larger area of escape and allowing rapid debris removal from the canal. Thus, when activated, the instrument does not make a thread; therefore it does not stick to the canal walls, diminishing the risk of instrument fracture, because it has a less aggressive cut,[ 20 ] which possibly reduces its cutting power, as it presents the lowest cutting efficiency among the studied instruments.…”
Section: Discussionmentioning
confidence: 99%