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Article
The effect of canal size on the penetration depth of endodontic irrigants

Author: Nawfal A Zakaria
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2006 Volume: 6 Issue: 1 Pages: 84-87
Publisher: Mosul University جامعة الموصل

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Abstract

Aim: To evaluate the effectiveness of canal size change on the penetration level of endodontic irrigant solution. Materials and Method: Five canals of different sizes (20, 25, 30, 35 and 40) were tested by preparing Class I cavity in the apex. Paper point was placed in this cavity and sealed 4 mm by sticky wax. Irrigation was done by methylene blue solution 15 times for each canal size, then the paper point piece examined under stereomicroscope for discoloration and wetness. Results: The irrigant solution was penetrated up to the apical area of the all canal sizes in the all 15 irrigation trials. The volume of fluid, the degree of fairing, the use of apical patency files, and the needle depth were the other different factors improving penetration depth of irrigating solution. Conclusions: There was no effect of canalsize on the penetration level of the endodontic irrigant.


Article
Evaluation of the effect of root canal preparation size and flaring on the depth of irrigant penetration (In vitro study)

Authors: Nada Abdulmunem A. Al-Sabbagh ندى عبد المنعم --- Hussain F. Al-Huwaizi حسين الحويزي
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2013 Volume: 25 Issue: 2 Pages: 31-35
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Cleaning and shaping of root canals successfully requires high volumes of irrigation solutions that canonly be applied to the apical third of root canal after enlargement with instrument, so the aim of this study was toevaluate and to compare the efficiency of Maxi-I-probe (side-vented needle), in the amount of root canal irrigantpenetration for five different master apical file sizes (MAF) and four different degrees of coronal and middle thirdsflaring.Materials and Methods: Two hundred resin blocks with simulated root canals were used in this study and divided into5 major groups (40 for each) based on the size of master apical files (#20, #25, #30, #35, and #40). Each major groupwas subdivided into 4 subgroups depending on different sizes and depth of flaring (10 for each).The instrumentationand flaring techniques were used as following: 1. without flaring group, root canal shape resembles shape of themaster apical K-file, 2. flaring I group, flaring done with Gates Glidden I for 2 mm coronally, 3. flaring II group, flaringwas done with Gates Glidden I for 4 mm coronally, Gates Glidden II for 2 mm, 4. flaring III group, flaring was donewith Gates Glidden I for 6mm,Gates Glidden II 4mm and Gates Glidden III for 2 mm coronally. Irrigation was donewith Max-i-probe gauge 28.Results: By comparing the five different master apical file sizes at four different degrees of flaring, there was anincrease in the amount of irrigant penetration with increase MAF size, taper had more effect in small canals size anddecreased with further enlargement of master apical file size until no benefit was achieved in large canals size.Conclusions: It was shown that, Max-i-probe had a limited amount of irrigant entrance. Flaring was more effective insmall canals than the larger canals in an amount of irrigant entrance; increasing MAF size was effective in anincrease amount of irrigant entrance

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