2004
DOI: 10.1590/s0103-64402004000200007
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Abstract: The aim of this study was to determine the effect of ultrasonic vibration on the force necessary to remove pre-fabricated and anatomic and cast posts. Two hundred and forty teeth were divided into two groups. In group I, a 0.8-mm metallic pre-fabricated post, UnimetricMaillefer, was utilized; in group II, cast copper-aluminum alloy posts measuring 0.8, 1.0 and 1.2 mm in diameter were used. The root canals were prepared in three different diameters: 0.8, 1.0 and 1.2 mm, with a length of 10 mm. The posts were ce… Show more

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Cited by 13 publications
(26 citation statements)
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“…This alternative vibration increases the fragmentation of the zinc phosphate cement, thus favoring the detachment of the intraradicular posts. 17,21 The power and the frequency of the ultrasonic waves generated by the device determine the physical characteristics of the vibrations.…”
Section: Discussionmentioning
confidence: 99%
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“…This alternative vibration increases the fragmentation of the zinc phosphate cement, thus favoring the detachment of the intraradicular posts. 17,21 The power and the frequency of the ultrasonic waves generated by the device determine the physical characteristics of the vibrations.…”
Section: Discussionmentioning
confidence: 99%
“…19 Several factors may interfere in the ultrasonic efficiency, such as the type of luting agent, length, form, diameter and type of post and post adaptation to the root canal walls. 8,17,18,20,21 The efficacy of ultrasound is related to the intensity and movement of the vibration, the manner in which the tip is applied on the core and the type of tip used. …”
Section: 16mentioning
confidence: 99%
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