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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effect of Ultrasonic Activation on pH and Calcium Released by Calcium Hydroxide Pastes in Simulated External Root Resorption

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Author(s):
Hungaro Duarte, Marco Antonio [1] ; Balan, Nickolas V. [2] ; Zeferino, Marcia A. [2] ; Vivan, Rodrigo R. [2] ; Morais, Carlos Alberto H. [3] ; Tanoniaru-Filho, Mario [4] ; Ordinola-Zapata, Ronald [1] ; Moraes, Ivalgo G. [1]
Total Authors: 8
Affiliation:
[1] Univ Sao Paulo, Dent Sch Bauru, Dept Operat Dent Dent Mat & Endodont, Bauru, SP - Brazil
[2] Sagrado Coracao Univ, Bauru, SP - Brazil
[3] Univ Estadual Maringa, Dept Dent, Maringa, Parana - Brazil
[4] UNESP Univ Estadual Paulista, Araraquara Dent Sch, Dept Restorat Dent, Araraquara, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: JOURNAL OF ENDODONTICS; v. 38, n. 6, p. 834-837, JUN 2012.
Web of Science Citations: 7
Abstract

Introduction: The purpose of this study was to analyze the influence of ultrasonic activation of calcium hydroxide (CH) pastes on pH and calcium release in simulated external root resorptions. Methods: Forty-six bovine incisors had their canals cleaned and instrumented, and defects were created in the external middle third of the roots, which were then used for the study. The teeth were externally made impermeable, except for the defected area, and divided into the following 4 groups containing 10 samples each according to the CH paste and the use or not of the ultrasonic activation: group 1: propylene glycol without ultrasonic activation, group 2: distilled water without ultrasonic activation, group 3: propylene glycol with ultrasonic activation, and group 4: distilled water with ultrasonic activation. After filling the canals with the paste, the teeth were restored and individually immersed into flasks with ultrapure water. The samples were placed into other flasks after 7, 15, and 30 days so that the water pH level could be measured by means of a pH meter. Calcium release was measured by means of an atomic absorption spectrophotometer. Six teeth were used as controls. The results were statistically compared using the Kruskal-Wallis and Mann-Whitney U tests (P < .05). Results: For all periods analyzed, the pH level was found to be higher when the CH paste was activated with ultrasound. Calcium release was significantly greater (P < .05) using ultrasonic activation after 7 and 30 days. Conclusions: The ultrasonic activation of CH pastes favored a higher pH level and calcium release in simulated external root resorptions. (J Endod 2012;38:834-837) (AU)

FAPESP's process: 08/07202-0 - Influende of the vehicle and use oif ultrason at the calcium hydroxide paste diffusion in bovine teeth
Grantee:Nickolas Vinicius de Paula Balan
Support Opportunities: Scholarships in Brazil - Scientific Initiation