Year: 2012
Type: conference-paper
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.
Authors: Muratovska, Ilijana, Atanasovska-Stojanovska, Aneta, Kovacevska, Ivona, Daci, Arian, Stojanovska, Vera
Language: English
Subfield: Oral Surgery
Field: Dentistry
Domain: Health Sciences
Open Access status: green
OpenAlex ID: W2233729447