Microhardness of root dentin: effect of endodontic techniques and irrigants

Muratovska, Ilijana and Atanasovska-Stojanovska, Aneta and Kovacevska, Ivona and Daci, Arian and Stojanovska, Vera (2012) Microhardness of root dentin: effect of endodontic techniques and irrigants. In: 17th Congress of BaSS, 2012, 3rd - 6th of May, Tirana, Albania.

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Abstract

The Aim of our study is to measure and evaluate the
effect of standard step-back (k-file) endodontic technique
and rotary (Pro-taper) endodontic technique followed
by irrigation with 2,5% Natrium hypohlorite alone or
combined with 17% EDTA on microhardness changes of
root canal dentin.
Method: Forty mandibular human unerupted trird
molars were sectioned transversely at the cementoenamel
junction and the crowns were discarded..
The data were recorded with Vicker’s hardness test,
0,5mm from the orificium of the canal before and
after the endodontic treatment. Subsequently, each
root was instrumented as following: group (1) stepback
technique and irrigation with 2,5% Natrium
hypohlorite, group (2) step-back technique and
irrigation with 2,5% Natrium hypohlorite and 17%
EDTA, group (3) crown down and irrigation with 2,5%
Natrium hypohlorite, group (4) crown down rotary and
and irrigation with 2,5% Natrium hypohlorite and 17%
EDTA.
Results: Both techniques caused significant reduction of
the microhardness of mineralized dentin with the largest
reductions observed after combination of 2,5% Natrium
hypochlorite with 17% EDTA. ANOVA statisti cal test is
p<0,01 for group (2) and group (4).
Conclusion::Clinicians must be aware of reducing dentin
thickness parallel with dentin hardness which may lead
to premature fractures and cracks especially after use of chelators.

Item Type:	Conference or Workshop Item (Poster)
Subjects:	Medical and Health Sciences > Clinical medicine Medical and Health Sciences > Health biotechnology Medical and Health Sciences > Other medical sciences
Divisions:	Faculty of Medical Science
Depositing User:	Ivona Kovacevska
Date Deposited:	29 Nov 2012 08:51
Last Modified:	02 Feb 2021 08:24
URI:	https://eprints.ugd.edu.mk/id/eprint/2403

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