Resumo

BRAGA, Neilor Mateus Antunes et al. Laboratory protocols for removal of intraradicular metallic posts using ultrasound: a critical review. RFO UPF [online]. 2012, vol.17, n.1, pp. 101-105. ISSN 1413-4012.

Objective: To investigate the specialized literature on laboratory protocols for removal of intraradicular metallic posts using ultrasound. Literature review: Sources of bibliographic cataloging identified electronically by Pubmed/Medline (www.pubmed.com.br) and Science direct (www.sciencedirect.com) were used. The terms intraradicular post removal ultrasound were used in the search, including the period from February 2004 until December 2010. The criteria for articles selection were: 1) with relation to ultrasonic vibration: the use or not of water cooling, time and method of application and number of devices used; 2) with relation to the posts: intervention in the core diameter and length, cementing agents and posts types. We found 11 articles that addressed at least one of the variables described. Based on the information verified in these studies it was found that the use of water cooling, longer and intermittent application of ultrasound, as well as the use of more than one device was important factors for the retainers' removal. This procedure was also optimized by wear of the diameter and length of the cores prior to ultrasonic vibration, especially when zinc phosphate and glass ionomer cements were used. In most studies, the variables were studied separately and not associated. Conclusions: The use of ultrasound is presented as a valuable method for removal of intraradicular retainers. However, new investigations involving the combination of the various procedures of ultrasonic vibration are necessary in order to improve the predictability and effectiveness of this technique.

Palavras-chave : Post and core technique; Tensile strength; Ultrasonics.