Ana Cássia de Souza REIS, Kalena de Melo MARANHÃO and Fernanda Ferreira de Albuquerque JASSÉ*
Department of Dentistry, School of Dentistry, Amazonia High School, Belém-PA, BrazilFulltext PDF
This study evaluated the effectiveness of different ultrasound machines for removing metal cast post-and-cores. 24 models of maxillary central incisors roots were made using acrylic resin. Each root had his canal patterned with resin Duralay (Reliance Dental) for making prosthetic metal cast post-and-cores, which were fused in Nickel-Chromium alloy (VeraBond II). Cores were cemented to the roots using zinc phosphate cement (SS White) and then stored in a humid environment for 30 days. The samples were divided randomly into two groups (n = 12), according to the ultrasound equipment used to remove the cores. For group I, a Sonic Jet-Total (Gnatus) unit was used and for Group II the Jet Ultrasound (D700) appliance was used. For removal of cores, both devices were operated at full power, with ultrasonic tips focusing on each face of the cores by up to 60 seconds, starting by the buccal surface and at the sequence, palatal, mesial, distal and incisal surfaces until the core have been removed or the cycle completed. The time required for removing each of the cores was tabulated, and the obtained data were statistically analyzed by student's t-test for independent samples. No statistical difference was observed between the analyzed groups (p> 0.005). It can be concluded that both devices tested showed the same level of effectiveness in the removal of intracanal cores.
Keywords: Ultrasonic vibration; Post and core technic; Device removal
de Souza REIS AC, de Melo MARANHÃO K, de Albuquerque JASSÉ FF. Comparative Analysis of Ultrasonic Apparatus for Removing Cast Post and Cores. J Dent Oral Biol. 2017; 2(11):1073.