A P Gomes1, C H Kubo, R A Santos, D R Santos, R Q Padilha. 1. Department of Endodontics, São José dos Campos School of Dentistry, UNESP Avenida Francisco José Longo, 777, São Dimas, CEP 12.201-970, São José dos Campos, São Paulo, Brazil. galera@netdata.com.br
Abstract
AIM: The aim of this study was to evaluate the influence of ultrasound during the removal of posts cemented with either zinc phosphate cement, glass ionomer cement or resin cement. METHODOLOGY:Eighty-four single-rooted teeth were prepared and after cementation of cast posts, they were randomly divided into six groups of 14. Group 1, 2 and 3 did not receive ultrasonic vibration, whilst groups 4, 5 and 6 received ultrasonic vibration for 10 min. The force necessary for post removal was determined using a universal testing machine. Results were statistically analysed using ANOVA and Tukey tests (5%). RESULTS: The application of ultrasonic vibration reduced the retention provided by zinc phosphate and glass ionomer cements by 39% and 33%, respectively. CONCLUSIONS: A statistically significant reduction in the force necessary to remove posts cemented with zinc phosphate and glass ionomer cements occurred following application of ultrasound. The application of ultrasonic vibration did not influence the retention of cast posts cemented with resin cement.
RCT Entities:
AIM: The aim of this study was to evaluate the influence of ultrasound during the removal of posts cemented with either zinc phosphate cement, glass ionomer cement or resin cement. METHODOLOGY: Eighty-four single-rooted teeth were prepared and after cementation of cast posts, they were randomly divided into six groups of 14. Group 1, 2 and 3 did not receive ultrasonic vibration, whilst groups 4, 5 and 6 received ultrasonic vibration for 10 min. The force necessary for post removal was determined using a universal testing machine. Results were statistically analysed using ANOVA and Tukey tests (5%). RESULTS: The application of ultrasonic vibration reduced the retention provided by zinc phosphate and glass ionomer cements by 39% and 33%, respectively. CONCLUSIONS: A statistically significant reduction in the force necessary to remove posts cemented with zinc phosphate and glass ionomer cements occurred following application of ultrasound. The application of ultrasonic vibration did not influence the retention of cast posts cemented with resin cement.
Authors: Ilione Kruschewsky Costa Sousa Oliveira; Ynara Bosco de Oliveira Lima Arsati; Roberta Tarkany Basting; Fabiana Mantovani Gomes França Journal: Int J Dent Date: 2012-01-15
Authors: Anny Carine Barros Aguiar; Daniely Amorim de Meireles; André Augusto Franco Marques; Emílio Carlos Sponchiado Júnior; Angela Delfina Bitencourt Garrido; Lucas da Fonseca Roberti Garcia Journal: Restor Dent Endod Date: 2014-07-17