Adaptation’s evaluation of gutta-percha cones in simulated canal instrumented with WaveOne Gold

Abstract

INTRODUCTION: The primary objective of endodontic therapy consists of the cleaning, disinfection and shaping of the root canal system, in order to allow a three-dimensional obturation that guarantees the absence of leakage of the root canal to the periradicular area. WaveOne Gold (WOG) is a nickel titanium (NiTi) mechanized files system with specific taper and size. Furthermore, WOG gutta-percha cones have similar taper and size to WOG files. On the other hand, there are Meta Biomed gutta-percha cones on the market with a taper and size similar to WOG instruments.

OBJECTIVE: To evaluate in vitro the adaptation of gutta-percha cones in a simulated curved canal instrumented with the WaveOne Gold system.

MATERIALS AND METHOD: An acrylic training block with simulated curved canal, instrumented with WaveOne Gold Primary file will be used. The adaptation of the cone to the walls of the canal in the coronary, middle and apical third will be evaluated. For this test, 10 WaveOne Gold Primary gutta-percha cones and 10 cones 25 / .06 from the Meta Biomed firm will be selected, among those gutta-percha cones that have reached and adjusted to the working length. A photo will be taken of the empty instrumented canal, using a clinical microscope, and subsequently to each gutta-percha cone inside the block. From the digital images, with the Corel Draw v.17 software, the surface of the instrumented canal and the surface of the gutta-percha cone will be delimited. An overlay of both images will be made to measure the adaptation of the gutta-percha cone to the canal surface, along the entire length of the canal, at 1mm intervals using Image Pro-Plus software v.4.5. The data will be analyzed using the variance test or factor.

RESULTS: The adaptation of WOG Primary gutta-percha cone into the simulated root canal revealed fewer empty spaces than Meta Biomed cones at coronal and medium thirds, in the internal and external root canal view, with significant statistical difference (p=0,002).

CONCLUSION: Root canal adaptation of gutta-percha cone into simulated canal instrumented with WOG was better when WOG Primary guttapercha cone was used. However, empty spaces at cervical and medium thirds were observed with both WOG Primary cones and Meta Biomed 25/.06 guttapercha cones.