Dissolution of nickel-titanium endodontic files via an electrochemical process: a new concept for future retrieval of fractured files in root canals.

Abstract:

INTRODUCTION:The retrieval of fractured instruments from root canals has been largely reported in the literature. However, a less complex retrieval method that causes minimum damage to the dental structures is needed. The aim of this article is to introduce a new concept of retrieval of fractured instruments from root canals based on an electrochemical process. METHODS:Current register tests were used to evaluate the dissolution process of 25.04 nickel-titanium (NiTi) K3 rotary files. A constant anodic potential was applied to the NiTi files, whereas the Potentiostat registered the anodic current. After the tests, all files were observed by using an optical microscope. RESULTS:The current attained initial values of approximately 55 mA that declined during the entire test. A good reproducibility of results was observed. The optical microscopy analysis evidenced a progressive consumption of the files with increasing polarization time. CONCLUSIONS:The results presented here show that the concept of fractured file retrieval by an electrochemical process is feasible. This concept resulted in a consistent basis for the development of a method to remove fractured instruments from root canals.

journal_name

J Endod

journal_title

Journal of endodontics

authors

Ormiga F,da Cunha Ponciano Gomes JA,de Araújo MC

doi

10.1016/j.joen.2009.11.024

subject

Has Abstract

pub_date

2010-04-01 00:00:00

pages

717-20

issue

4

eissn

0099-2399

issn

1878-3554

pii

S0099-2399(09)01024-3

journal_volume

36

pub_type

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