Effects of radicular dentin treatments and luting materials on the bond of quartz fiber posts: scanning electron microscope study
10.3760/cma.j.issn.1002-0098.2010.02.010
- VernacularTitle:根管壁不同处理方法对纤维桩粘接影响的扫描电镜观察
- Author:
Hai-Yan MAO
1
;
Bin YAN
;
Li-Jun FENG
;
Ya-Ming CHEN
Author Information
1. 南京医科大学
- Keywords:
Microscopy;
electron;
scanning;
Fiber post;
Engergy dispersive X-ray spectroscopy
- From:
Chinese Journal of Stomatology
2010;45(2):102-104
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the effects of radicular dentin treatments of sodium hypochlorite (NaOCl) and ethylenediaminetctraacetic acid (EDTA) on the regional root canal bending interface of quartz fiber posts using 2 luting materials with SEM analysis. Methods Nine intact maxillary central incisors were sectioned and endodontically treated. Standardized post space preparations and acid etch were performed . All specimens were randomly divided into 3 groups(n =3). D.T. LIGHT posts were placed into the root canal using one of three radicular dentin treatments(0. 9% NaCl for 60 s, 10% NaOCl for60 s, 17% EDTA for 60 s followed by 5.25% NaOCl for 60 s) in combination of one of two luting materials (DuoLink, LuxaCore) respectively (factorial design). Cervical, middle, apical sections of each teeth are used for SEM study and spectroscopy of dispersion energy (EDS) microanalysis. Results With the radicular dentin treatment with 10% NaOCl alone or with 17% EDTA followed by 5.25% NaOCl, longer and increased number of penetration of resin tags into the dentinal tubules were observed at the resin-dentin interfaces, and adhesive lateral branches could be found easily. EDS microanalysis showed increase in the infiltration behavior of the luting cement. Conclusions Radicular dentin treatments provide good resin infiltration, which can produce a three-dimensional interlocking micronetwork of resin tags in the dentin tubules with multiple lateral branches that penetrate the intertubalar dentin, thus positively influence the adhesion between dentin and the luting materials.
