scholarly journals Effectiveness of Three Rotary Niti Instruments and Hand Instrumentation in Removing Gutta Percha from Root Canals: an in vitro Study

2015 ◽  
Vol 03 (03) ◽  
pp. 152-158
Author(s):  
Varun Jindal ◽  
Ajay Chhabra ◽  
◽  
Keyword(s):  
In Vitro Study ◽  
Radiographic Analysis ◽  
Filling Material ◽  
Universal System ◽  
Root Canals ◽  
Gutta Percha ◽  
Significant Difference ◽  
Niti Instruments ◽  
Hand Instrumentation

Abstract Objectives: The study aimed to assess variation in the remaining filling material by radiographic analysis and the time taken for retreatment system, with H-files; the ProTaper Universal Retreatment System; Mtwo retreatment system and the SybronEndo K3. Methods: 120 human mandibular premolars with single straight root canals were prepared with rotary twisted files (up to size 40/0.04) using the crown down technique and filled by cold lateral condensation and the radiographs were taken. After one week, teeth were divided into four groups (n = 30). Gutta-percha was removed using H-files, the ProTaper Universal Retreatment System, Mtwo system and the K3 System. After retreatment radiographs were taken for each sample and the remaining material was calculated for each canal third. Results: Rotary NiTi instruments were significantly faster than the hand instrumentation technique in performing the retreatment. In radiographic analysis there was significant difference in between the groups for coronal third in ProTaper group and for apical third in H-file group. Conclusions: In the radiographic analysis the ProTaper Universal System left less filling material in the coronal third and the H-files left less filling material in apical third as compared to other groups. Rotary instruments worked faster than H files.

scholarly journals Sealing Ability of Endodontic Cements: An In Vitro Study

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Amira Kikly ◽  
Sabra Jaâfoura ◽  
Dorra Kammoun ◽  
Saida Sahtout
Keyword(s):  
In Vitro Study ◽  
Resin Cement ◽  
Apical Region ◽  
Filling Material ◽  
Root Canals ◽  
Gutta Percha ◽  
Sealing Ability ◽  
Adhesive Dentistry ◽  
Significant Difference

The root canal system must be obturated using a hermetic seal to prevent the penetration of microorganisms and bacterial toxins into the endodontic system. The principles of adhesive dentistry have been increasingly used in endodontics. In fact, resin-based sealers are increasingly used. The objective of this study was to evaluate, in vitro, the sealing ability of resin cement in comparison with calcium hydroxide-based cement. Materials and Methods. Eighty root canals were prepared with the Tilos system and were randomly divided into four groups according to the filling material. The best combination was evaluated on the basis of its sealing ability. The dye infiltration degree was evaluated using both a stereomicroscope after diaphanization and the dye rise test. Results. A significant difference was observed between the four obturation systems with regard to the number of infiltrated walls (p=0.014) and the infiltration depth (p=0.025). The group of teeth obturated with EndoREZ® and EndoREZ® gutta cones differ significantly from the group obturated with EndoREZ® cement and gutta-percha cones in terms of apical sealing (p=0.011). A significant difference was also observed between the group of teeth obturated using EndoREZ® gutta cones and EndoREZ® cement and the group of teeth obturated with EndoREZ® cement (p=0.026). Conclusion. When used with EndoREZ® gutta cones, EndoREZ® cement showed the best sealing ability, particularly in the apical region. When used with gutta-percha cones, Acroseal and EndoREZ® cements exhibited similar sealing abilities.

scholarly journals Efficacy Of Two NI-TI Retreatment Systems and Hand Files in Removing Gutta-Percha and Sealer From Root Canals Filled With Three Different Types of Sealers

2015 ◽  
Vol 03 (02) ◽  
pp. 071-079
Author(s):  
Rajender Singh ◽  
Ashu Gupta ◽  
Vishal Sharma
Keyword(s):  
Operating Time ◽  
Filling Material ◽  
Test Results ◽  
Root Canals ◽  
Gutta Percha ◽  
Honestly Significant Difference ◽  
Working Length ◽  
Significant Difference ◽  
Hand Instrumentation ◽  
Difference Test

Abstract Objectives: This study was undertaken to evaluate the efficiency of two rotary nickel titanium instruments and hand instrumentation in removing gutta-percha and sealer from root canals. Study design: – 63 extracted human single rooted premolars were instrumented with K-files and filled using lateral compaction of gutta-percha (GP) and three different sealers. The teeth were randomly divided into three experimental groups of 21 specimens each. Removal of gutta-percha was performed with R-Endo retreatment files, Mtwo retreatment files and Hedstrom files. Time to reach working length and to eliminate filling material was also recorded. The specimens were sectioned for evaluation of the area of the remaining gutta-percha/sealer under stereomicroscope at 6X magnification. Photographs were taken for further analysis using computer image analysis program. The results were statistically analyzed using Analysis of variance (ANOVA) and Tukey’s honestly significant difference test. Results: The R-Endo retreatment system resulted in a smaller percentage of canal area covered by residual GP/sealer than in other groups, a significant difference was found between R-Endo and Mtwo group and between Hedstrom groups (P < 0.001). The Mean operating time was minimum with R-Endo group while it was found to be maximum with hand files. Conclusion: It was concluded that all test techniques left gutta-percha/sealer remnants within the root canal. The R-Endo retreatment files and Mtwo retreatment files system proved to be an efficient method for removing gutta-percha and sealer from single rooted premolars.

scholarly journals In vitro evaluation of apical microleakage using different root-end filling materials

2006 ◽  
Vol 14 (1) ◽  
pp. 49-52 ◽  
Author(s):  
Márcia Carneiro Valera ◽  
Carlos Henrique Ribeiro Camargo ◽  
Alessandra Sverberi Carvalho ◽  
Eduardo Ramalho Pereira Gama
Keyword(s):  
Zinc Oxide ◽  
Root Apex ◽  
Tissue Fluid ◽  
Filling Material ◽  
Human Teeth ◽  
Root Canals ◽  
Filling Materials ◽  
Gutta Percha ◽  
Significant Difference

The objective of this study was to evaluate the apical leakage of retrograde cavities filled with Portland Cement (Concrebrás S/A-MG-Brazil), ProRoot MTA TM (Dentsply International, Johnson City, TN, USA) and Sealapex (Kerr Corporation, Orange, California, USA) with addition of zinc oxide (Odahcam Herpo Produtos Dentários Ltda, Rio de Janeiro, RJ, Brazil). Forty-two extracted single-rooted human teeth were decoronated and used for this study. The root canals were instrumented at 1.0mm short of the apical foramen using the step-back technique to an apical ISO size 60. The roots were obturated with gutta-percha points and sealer Sealapex (Kerr Corporation-USA) and then 3mm of each root apex was sectioned at a 90° angle. Ultrasonic retrograde preparation was performed with a diamond tip to 3mm depth and the roots were randomly divided into 3 groups according to the filling material: G1-Portland, G2-ProRoot MTA, G3- Sealapex zinc oxide-added cement. The root surfaces were covered with nail varnish up to 2mm from the apical foramen, immersed in simulated tissue fluid for 30 days, and then immersed in 0.2% Rhodamine B solution for 24 hours for evaluation of marginal leakage. The results showed mean leakage of 0.75, 0.35 and 0.35 for groups 1, 2 and 3, respectively; however, Kruskal-Wallis test revealed that there was no statistically significant difference among the results (p>0.05).

scholarly journals Evaluation of apically extruded debris during removal of gutta-percha and ResilonTM using different instrumentation techniques

2018 ◽  
Vol 75 (1) ◽  
pp. 56-61
Author(s):  
Dragana Pesic ◽  
Irena Melih ◽  
Veljko Kolak ◽  
Ana Nikitovic ◽  
Ankica Jakovljevic
Keyword(s):  
Treatment Success ◽  
In Vitro Study ◽  
Filling Material ◽  
Gutta Percha ◽  
Rotary Instruments ◽  
Apical Extrusion ◽  
Significant Difference ◽  
Ah Plus ◽  
Endodontic Retreatment

Background/Aim. Apical extrusion of material is considered as one of the very important factor for endodontic treatment success. Microorganisms, necrotic tissue, filling material and irrigants, which can be extruded apically during endodontic retreatment, may jeopardize the success of the therapy. The aim of this in vitro study was to quantitatively evaluate the amount of apically extruded debris during endodontic retreatment of teeth obturated with two different materials, using one hand and three rotary instrumentation techniques. Methods. Ninety-six extracted single-rooted teeth were endodontically treated and enlarged to size 40 using BioRaCe system, and then randomly divided into 8 groups of 12 specimens each. Half of the specimens were obturated with gutta-percha and AH Plus? sealer and another half with RealSeal SE system, using lateral condensation technique. Retreatment was performed using: Hedstr?m files; ProFile rotary files; ProTaper Retreatment system and D-RaCe system. Apically extruded debris was collected in pre-weighed Eppendorf tubes and evaluated using an electronic microbalance. Data were analyzed statistically using t-test and analysis of variance. Results. In the AH Plus/gutta-percha group, all tested rotary instruments gave significantly less extruded debris compared with Hedstr?m files (p < 0.05). In theRealSeal group, there was significant difference between DRaCe and Hedstr?m instruments (p < 0.05). Conclusion. All retreatment techniques resulted in apical extrusion. DRaCe system produced significantly less extruded debris compared to hand files. No significant difference was found when comparing two instruments specially designed for retreatment: D-RaCe and ProTaper systems.

scholarly journals Comparative Evaluation of Efficacy of Three Different Rotary Retreatment Systems with Manual Instrumentation in Removing Gutta-Percha from Root Canals – An In Vitro Study

2021 ◽  
Vol 10 (14) ◽  
pp. 1025-1029
Author(s):  
Aparna V. Muraleedhar ◽  
Sarvapelli Venkata Satish ◽  
Ashwini M. Patil ◽  
Suresh Kumar Kovvuru ◽  
Snehalatha Patil
Keyword(s):  
In Vitro Study ◽  
Lower Amount ◽  
Filling Material ◽  
Root Canals ◽  
Gutta Percha ◽  
Residual Material ◽  
Group 2 ◽  
Post Hoc ◽  
Endodontic Retreatment

BACKGROUND The primary goal of endodontic retreatment is to take out the root filling completely to ensure that the canal is completely cleaned. Gutta percha removal using hand instruments is a time-consuming procedure and tedious for the operator. Therefore, various nickel titanium instruments have been introduced for the effective retrieval of gutta percha. This study was done to compare the efficacy of three different rotary systems compared with manual instrumentation for gutta percha removal during retreatment. METHODS Forty-eight single rooted premolars were prepared and obturated using gutta percha and AH Plus sealer using lateral compaction technique. Samples were randomly divided into four groups of 12 specimens each. Group 1 was retreated with Hedstrom Files (H-Files), group 2 was retreated with pro taper universal retreatment files (PTUR), group 3 with R-Endo retreatment files and group 4 with Neoendo retreatment files. Time taken for the retreatment was recorded for each tooth using a stopwatch. The samples were sectioned longitudinally and observed under a stereomicroscope. Digital images were taken and analysed using digital image analysing software. The data was statistically analysed using Kruskal-Wallis and Post-hoc Mann-Whitney test. RESULTS The Neoendo group showed significantly lower amount of residual material compared to PTUR, R-Endo and the H-Files (P = 0.00). The maximum residual material was observed in the H file group. The time taken for gutta percha removal was least for the Neoendo group followed by PTUR, R-Endo and H-Files. CONCLUSIONS None of the instruments were able to remove the filling material completely. Gutta percha removal using Neoendo and protaper universal retreatment files were faster and more efficient compared to REndo and H files. KEY WORDS Endodontic Retreatment, Protaper Universal Retreatment Files, R-Endo, Neoendo, HFiles

scholarly journals In vitro study of effect of solvent on root canal retreatment

2002 ◽  
Vol 13 (3) ◽  
pp. 208-211 ◽  
Author(s):  
Kazumi Onaga Nagayama Oyama ◽  
Evandro Luiz Siqueira ◽  
Marcelo dos Santos
Keyword(s):  
In Vitro Study ◽  
The Other ◽  
Orange Oil ◽  
Root Canals ◽  
Effect Of Solvent ◽  
Gutta Percha ◽  
Root Canal Retreatment ◽  
Significant Difference ◽  
Made In

The aim of this study was to assess the effectiveness of five different solvents: xylol, eucalyptol, halothane, chloroform and orange oil on softening gutta-percha in simulated root canals. One drop of solvent was placed into a reservoir made in a simulated canal whose channel was previously instrumented and filled with gutta-percha and N-Rickert sealer. After 5 min, softening was evaluated for each solvent by the penetration of a spreader while applying force with a 442 Instron apparatus to reach a depth of 5 mm. The results were analyzed statistically by the Kruskal-Wallis test. Xylol and orange oil were better in softening gutta-percha than the other solvents. There was no significant difference between xylol and orange oil, but these were statistically different from eucalyptol, halothane and chloroform (p<0.01).

scholarly journals Fracture resistance of roots enlarged with various rotary systems and filled with various sealers

2019 ◽  
Vol 13 (3) ◽  
pp. 215-220
Author(s):  
Selen İnce Yusufoglu ◽  
Melek Akman ◽  
Makbule Bilge Akbulut ◽  
Ayce Ünverdi Eldeniz
Keyword(s):  
Fracture Resistance ◽  
Testing Machine ◽  
In Vitro Study ◽  
Universal System ◽  
Gutta Percha ◽  
Significant Difference ◽  
Ah Plus ◽  
Group 2 ◽  
Group 1

Background. This in vitro study compared the fracture resistance of roots instrumented either with ProTaper or One Shape rotary systems and filled with one of the silicate, epoxy resin or silicone-based sealers. Methods. Sixty single-rooted extracted mandibular premolars were decoronated to a length of 13 mm and then randomly divided into two main groups (n=30) in terms of the rotary system used for preparation. Group 1 samples were instrumented with the ProTaper Universal system up to a master apical file of #F2, while samples in group 2 were enlarged with One Shape system. The two main groups were then divided into 3 subgroups in terms of the sealer used (n=10) and filled with gutta-percha (either F2 or MM-GP points) of the rotary system used and one of the sealers as follows: group 1, BioRoot RCS + ProTaper F2 gutta-percha; group 2, AH Plus + ProTaper F2 gutta-percha; group 3, GuttaFlow + ProTaper F2 gutta-percha; group 4, BioRoot RCS+ MM-GP points; group 5, AH Plus + MM-GP points; and group 6, GuttaFlow + MM-GP points. Each specimen then underwent fracture testing by using a universal testing machine at a crosshead speed of 1.0 mm/min until the root fractured. Data were statistically analyzed. Results. Two-way ANOVA showed no significant differences between the groups. One Shape instruments showed significantly better fracture resistance compared to ProTaper instruments. Statistically, no significant difference was found between AHPlus, GuttaFlow and BioRoot RCS sealers. Conclusion. It can be concluded that the rotary system used for the instrumentation of teeth has some influence on the fracture resistance, while the root canal sealers do not have such an effect.

scholarly journals Comparative Analysis of Efficacy of Hand and Rotary NiTi Instruments in Gutta-percha Removal in Root Canal Retreatment: An in vitro study

2016 ◽  
Vol 02 (02) ◽  
pp. 085-089
Author(s):  
Abhilasha Dass ◽  
Ajay Saxena ◽  
Manoj Chandak ◽  
Pradnya Nikhade ◽  
Chandani Bhatia ◽  
...  
Keyword(s):  
In Vitro Study ◽  
Filling Material ◽  
Experimental Conditions ◽  
Time Saving ◽  
Gutta Percha ◽  
Anterior Teeth ◽  
Working Length ◽  
Root Canal Retreatment ◽  
Niti Instruments

AbstractTo evaluate the efficacy and cleaning ability of two different rotary nickel-titanium (NiTi) instruments and hand instruments with and without solvent (Endosolv R) in the removal of gutta-percha (GP) root fillings. Sixty extracted single-rooted anterior teeth were enlarged to size F3 and obturated with warm vertical compaction using AH Plus as the sealer. Removal of GP was performed with the following devices and techniques: Hedstrom files, ProTaper, and R-Endo files. The technique that removed GP most effectively was found using R-Endo instruments and Endosolv R, followed by R-Endo without solvent, followed by ProTaper with solvent, ProTaper without solvent, followed by Hedstrom files with solvent, and Hedstrom files without solvent. There was no visible filling material extruded apically. They concluded that under the experimental conditions, R-Endo and ProTaper NiTi instruments proved to be efficient and time-saving devices for the removal of GP. The use of Endosolv R as a solvent shortened the time to reach the working length (WL) and to remove the GP, but this was not significant.

scholarly journals Comparative assessment of manual, rotary and reciprocating instruments for removal of root fillings, using stereomicroscope: An in vitro study

2019 ◽  
Vol 45 (1) ◽  
pp. 54-61
Author(s):  
Afzal Ali ◽  
Sazid Hussain ◽  
Sandeep Metgud ◽  
Shashank Mishra ◽  
Ankita Sharma ◽  
...  
Keyword(s):  
Root Canal ◽  
File Systems ◽  
In Vitro Study ◽  
Filling Material ◽  
Root Canal Filling ◽  
Root Canals ◽  
Tukey Test ◽  
Gutta Percha ◽  
Reciprocating Instruments

Background: To investigate the efficiency of Hedstrom (H; Dentsply Maillefer) file, Protaper Universal Retreatment system (PTUR; Dentsply Maillefer), Mani NRT-GPR files (Mani, Japan) and WaveOne (WO; Dentsply Maillefer) Reciprocating files in removing Gutta Percha (GP) and sealer from root canals. Methods: Sixty canals with less than 10° curvature from extracted human maxillary incisors were used. Root canal reinstrumentation was performed with H, PTUR, Mani NRT-GPR and WO files. Amount of residual root filling material (Gutta-percha and or sealer) were measured by using stereomicroscope. Data of GP or sealer remnants were statistically analyzed using one-way analysis of variance and Tukey test. Results: There were no significant differences among 4 groups in terms of residual root filling material in the apical third (p > 0.05). H-file group showed highest amount of root residual root filling as compared to groups. Conclusions: Reciprocating file system proved to be more efficient in removing the root canal fillings material than other retreatment file systems. H file group showed highest amount of root canal filling material. Bangladesh Med Res Counc Bull 2019; 45: 54-61

scholarly journals The Antibacterial Efficacy of Biopure MTAD in Root Canal Contaminated with Enterococcus faecalis

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Blerim Kamberi ◽  
Donika Bajrami ◽  
Miranda Stavileci ◽  
Shuhreta Omeragiq ◽  
Fatmir Dragidella ◽  
...  
Keyword(s):  
In Vitro Study ◽  
Sodium Hypochlorite Solution ◽  
Antibacterial Efficacy ◽  
Human Teeth ◽  
Exact Test ◽  
Hypochlorite Solution ◽  
Root Canals ◽  
Significant Difference ◽  
Level Of Significance

Aim. The purpose of this in vitro study was to assess the antimicrobial efficacy of Biopure MTAD against E. faecalis in contaminated root canals. Materials and Methods. Forty-two single rooted extracted human teeth were inoculated with E. faecalis and incubated for four weeks. The samples were divided in two control and five experimental groups irrigated with 1.5% sodium hypochlorite solution (NaOCl); 3% NaOCl; BioPure MTAD; 1.5% NaOCl/17% EDTA; or 3% NaOCl/17% EDTA. After a one-week incubation, complete disinfection was confirmed by the absence of turbidity in the incubation media. Dentin shavings were taken from samples with no turbidity to verify whether E. faecalis was present in dentin tubules. Results were analyzed statistically using Fisher's exact test, with the level of significance set at . Results. Statistical analysis of the data obtained at Day 7 and after dentin shaving analysis showed that BioPure MTAD had significantly greater antibacterial activity than 1.5% NaOCl, 1.5% NaOCl/17% EDTA and 3% NaOCl/17% EDTA. No significant difference was detected between MTAD and 3% NaOCl. Conclusions. These findings suggest that BioPure MTAD possesses superior bactericidal activity compared with NaOCl and EDTA against E. faecalis.

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