z-logo
open-access-imgOpen Access
In vitro evaluation of coronal microleakage associated with two root obturation techniques
Author(s) -
Slavoljub Živković,
Borislava David-Burlica,
Jelena Stanišić,
Sonja Stojcic,
Milica Medojević-Jovanović,
Dragoslav Dacic
Publication year - 2007
Publication title -
stomatološki glasnik srbije
Language(s) - English
Resource type - Journals
eISSN - 1452-3701
pISSN - 0039-1743
DOI - 10.2298/sgs0703184z
Subject(s) - gutta percha , smear layer , dentistry , coronal plane , materials science , root canal , stereo microscope , significant difference , medicine , radiology
Aim: The purpose of this study was to determine the influence of the smear layer on the coronal microleakage in root canals obturated with laterally condensed cold gutta-percha or Thermafil and two root canal sealers. Materials and methods: Sixty extracted single-rooted human teeth with straight root canals were allocated to two experimental groups. The root canals were instrumented using the STEP-BACK technique, K reamers and K files and irrigated with 2.5 % NaOCl. The teeth in the first group were treated with 17% EDTA and 2.5 % NaOCl to remove the smear layer. The teeth in both groups were obturated either with laterally condensed cold guttapercha (28 teeth) or Thermafil gutta-percha with plastic cores (28 teeth) and RSA or AH-PLUS sealers. The specimens were evaluated for coronal microleakage using silver nitrate solution. The linear penetration of the dye was assessed using a binocular magnifying glass (x25), with an inserted micrometer scale. Results: The results showed low coronal microleakage in the group where the smear layer was removed in both the lateral compaction technique (RSA - 1.71mm and AHPLUS - 1.61mm) and the Thermafil groups - RSA (1.65mm) and AH-PLUS (1.66mm). In the group with the intact smear layer, greater microleakage was noticed in both groups, lateral compaction technique -RSA (3.06 mm) and AH-PLUS (2.83mm) and Thermafil technique -RSA (2.99mm) and AH-PLUS ( 2.83mm). The difference was statistically significant between the groups with and without the smear layer for both RSA (p< 0.001) and AH-PLUS sealers ( p<0.001). Conclusion: The present results suggest that the removal of the smear layer significantly improves the tightness of the coronal seal and reduces the coronal microleakage

The content you want is available to Zendy users.

Already have an account? Click here to sign in.
Having issues? You can contact us here