Obturation Of Simulated Lateral Canals Using Heat And Vibration Techniques And The Effect Of Irrigation Methods
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Date
2012-11
Authors
Thauk, Moe
Journal Title
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Publisher
Universiti Sains Malaysia
Abstract
The aims of this study were (a) to evaluate the effectiveness of two warm vertical obturation techniques and the auxiliary action of two irrigation methods by measuring the percentage gutta-percha penetration (PGP) into the simulated lateral canals: (b) to compare the cleaning efficiency of two irrigation methods through the assessment of smear layer using SEM examination. A total of 140 mandibular second premolars were used in this study. Three simulated lateral canals were crated at distal root surface; coronal, middle and apical third. The teeth were then divided into four groups (G1, G2, G3 and G4) (n= 35). Root canal preparation was done using K3 rotary file in crown-down technique. In G1 and G2 irrigation was performed by alternate use of 5.25% NaOCl and 17% EDTA respectively using irrigation syringe. The same procedure was performed for G3 and G4, but for final flush, NaOCl was agitated by polymer-based rotary file with rotation. G1 and G3 were obturated by using system B heat source (heat only). G2 and G4 were obturated using DownPak device (heat with vibration). Subsequently the teeth were radiographed bucco-lingually and the length of penetrated GP into the lateral canals was measured using VixWin™ Pro 2000 software. The length of GP penetration was transformed into percentage. The data were analyzed using multifactorial-ANOVA test. While SEM study, thirty-two mandibular second premolars were used. Teeth were divided into two groups as Group A and Group B (n=16). Root canals were prepared using crown-down technique using K3 rotary file. The method used for Group A the same as G1 and G2 whereas for Group B the method was same as G2 and G4. After irrigation the teeth were split longitudinally using diamond disc. The coronal, middle and apical third levels of the root canal surfaces were then examined under SEM and taken photomicrographs. The smear layer scores were evaluated from the photomicrographs at 1000X. The data were analyzed using Mann-Whitney test.
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Keywords
Obturation of simulated lateral canals , using heat and vibration techniques