Etidronate from Medicine to Endodontics: effects of different irrigation regimes on root dentin roughness

Talita Tartari,Jose Otavio Carrera Silva Junior,Eliza Burlamaqui Klautau,Patricia De Almeida Rodrigues Silva E Souza Junior Souza Junior,Mario Honorato Silva E Souza Junior,Anivaldo Pereira Duarte Junior

doi:10.1590/1679-775720130201

Talita Tartari, Jose Otavio Carrera Silva Junior + Show 4 more

Open Access

https://doi.org/10.1590/1679-775720130201

Copy DOI

Abstract

An increase in dentin roughness, associated with surface composition, contributes to bacterial adherence in recontaminations. Surface roughness is also important for micromechanical interlocking of dental materials to dentin, and understanding the characteristics of the surface is essential to obtain the adhesion of root canal sealers that have different physico-chemical characteristics.ObjectivesTo evaluate the effects of sodium hypochlorite (NaOCl), ethylenediaminetetraacetic (EDTA), etidronic (HEBP), and citric acid (CA) associated with different irrigation regimens on root dentin roughness.Material and MethodsForty-five root halves of anterior teeth were used. The root parts were sectioned in thirds, embedded in acrylic resin and polished to a standard surface roughness. Initially, the samples of each third were randomly assigned into 3 groups and treated as follows: G1 - saline solution (control); G2 - 5% NaOCl+18% HEBP mixed in equal parts; and G3 - 2.5% NaOCl. After initial measuments, the G3 samples were distributed into subgroups G4, G5 and G6, which were subjected to 17% EDTA, 10% CA and 9% HEBP, respectively. Following the new measuments, these groups received a final flush with 2.5% NaOCl, producing G7, G8 and G9. The dentin surface roughness (Ra) was determined before and after treatments using a profilometer. The Wilcoxon test (α<0.05) was used to compare the values before and after treatments, and the Friedman test (α<0.05) to detect any differences among root thirds. Results(i) NaOCl did not affect the surface roughness; (ii) there was a significant increase in roughness after the use of chelating agents (P<0.01); and (iii) only the G3 group showed a difference in surface roughness between apical third and other thirds of the teeth (P<0.0043).ConclusionOnly the irrigation regimens that used chelating agents altered the roughness of root dentin.

Highlights

Adhesion involves interactions at the interface between materials and depends of several factors as cleanliness, composition, and roughness of adherent surface
The median and interquartile range of roughness values of root canal dentin before and after treatment with irrigation regimens in cervical, middle, and apical thirds are summarized in Tables 1, 2 and 3, respectively
A significant increase in dentin roughness was observed following the treatment with the different irrigation regimens, except when saline (G1) or NaOCl (G3) were used alone

Summary

Introduction

Adhesion involves interactions at the interface between materials and depends of several factors as cleanliness, composition, and roughness of adherent surface. To attain effective adhesive bonding, it is important that the adherent have a clean and rough surface[18]. Irrigating solutions used in Endodontics clean the dentin surface, and may interfere with the chemical structure of dentin, changing the calcium/ phosphorus (Ca/P) ratio of the surface[11]. These alterations can increase the surface roughness[3,12], which may affect the sealing ability and adhesion of dental materials – such as resin-based cements and root canal sealers – to dentin[16,24] and alter the nature of adhesion and the adhesion strength of

Objectives

Methods

Results

Conclusion