Comparative evaluation of porosity distribution in root canals obturated with gutta-percha using single-cone technique and thermoplasticized technique

2020 ◽  
Vol 10 (2) ◽  
pp. 126
Author(s):  
KarunaY Mahabala ◽  
Tanya Sawhney ◽  
AnsuAnn Abraham ◽  
Madhura Sen ◽  
Srikant Natarajan ◽  
...  
Keyword(s):  
Comparative Evaluation ◽  
Porosity Distribution ◽  
Root Canals ◽  
Gutta Percha ◽  
Single Cone

scholarly journals Porosity Distribution in Single Cone Root Canal Fillings Performed by Operators with Different Clinical Experience: A microCT Assessment

2021 ◽  
Vol 10 (12) ◽  
pp. 2569
Author(s):  
Saulius Drukteinis ◽  
Goda Bilvinaite ◽  
Paulius Tusas ◽  
Hagay Shemesh ◽  
Vytaute Peciuliene
Keyword(s):  
Root Canal ◽  
Micro Computed Tomography ◽  
Porosity Distribution ◽  
Significance Level ◽  
Root Canals ◽  
Gutta Percha ◽  
General Dental Practitioner ◽  
Single Cone ◽  
Maxillary Premolars ◽  
Computed Tomography Scanner

The objective of this study was to assess the porosity distribution of BioRoot RCS/single gutta-percha point root-canal fillings performed by a general dental practitioner and endodontist. Fourteen plastic models of maxillary premolars with two roots were selected and shaped with HyFlex EDM instruments to a size 40/0.04 taper and randomly divided into two experimental groups. A total of 14 canals in each group were obturated by two different operators with one HyFlex EDM size 40 gutta-percha point and BioRoot RCS sealer. The specimens were scanned with a high-resolution micro-computed tomography scanner, and the porosity of the fillings at the coronal, middle, and apical thirds of the root canals was qualified and quantified. The differences between groups and root-canal thirds were compared using Mann–Whitney, Friedman, and Wilcoxon tests with the significance level set at p < 0.05. The highest number of pores was observed in the apical third of root-canal fillings in both groups; however, the porosity distribution between the two groups was not significantly different in the apical and middle thirds (p > 0.05). Statistically significant differences were determined only in the coronal third (p < 0.05). The predominance of open pores was detected in all root-canal thirds and groups, with no significant differences in the number of open pores between the coronal and middle thirds (p > 0.05).

In vitro Comparative Evaluation of the Fracture Resistance of Simulated Immature Teeth reinforced with Different Apical Barriers and Obturation Combination

2016 ◽  
Vol 7 (3) ◽  
pp. 113-118
Author(s):  
Neveen A Shaheen ◽  
Nahla G El-Din El-Helbawy
Keyword(s):  
Fracture Resistance ◽  
Comparative Evaluation ◽  
Negative Control ◽  
Control Group ◽  
Root Canals ◽  
Immature Teeth ◽  
Gutta Percha ◽  
Group I ◽  
Significant Difference

ABSTRACT Aim This study aimed to assess and compare the fracture resistance of simulated immature teeth reinforced with Biodentine (BD) and mineral trioxide aggregate (MTA) as apical barriers and two root canal backfilling combination (gutta-percha/AH26, MetaSeal). Materials and methods A total of 70 extracted human maxillary incisors were randomly divided into seven groups (n = 10). The positive control group was not instrumented. For the other groups, coronal access was made and root canals were instrumented using the ProTaper, up to F5 followed by six Peeso reamers which were allowed to pass 1 mm beyond the apex to size 6 (1.7 mm) to simulate immature teeth. The apical 4 mm of their root canals was filled with either MTA or BD apical barrier, then backfilled with gutta-percha/AH26 or MetaSeal obturation combination. The negative control group was left unfilled. Composite resin was used to restore the coronal access cavities. The maximum load for fracture of each tooth was recorded utilizing a universal testing machine. Data were analyzed using two-way analysis of variance. Results The noninstrumented group I had the highest fracture resistance and differed significantly (p < 0.05) from the negative control groups. On the contrary, no significant difference was found between BD and MTA groups, regardless of the backfilling combination (p > 0.05). Conclusion There was no difference between MTA and BD apical barriers and the backfilling combination regarding their resistance to root fracture. How to cite this article Shaheen NA, El-Din El-Helbawy NG. In vitro Comparative Evaluation of the Fracture Resistance of Simulated Immature Teeth reinforced with Different Apical Barriers and Obturation Combination. World J Dent 2016;7(3):113-118.

scholarly journals The Effect of Ultrasonic Agitation on the Porosity Distribution in Apically Perforated Root Canals Filled with Different Bioceramic Materials and Techniques: A Micro-CT Assessment

2021 ◽  
Vol 10 (21) ◽  
pp. 4977
Author(s):  
Saulius Drukteinis ◽  
Goda Bilvinaite ◽  
Hagay Shemesh ◽  
Paulius Tusas ◽  
Vytaute Peciuliene
Keyword(s):  
Root Canal ◽  
Micro Computed Tomography ◽  
Root Canal Filling ◽  
Porosity Distribution ◽  
Significance Level ◽  
Ultrasonic Agitation ◽  
Root Canals ◽  
Gutta Percha ◽  
Before And After ◽  
Rotary Instrument

The present study evaluated the effect of ultrasonic agitation on the porosity distribution of BioRoot RCS/single gutta-percha cone (BR/SC) and MTA Flow (MF) root canals fillings used as apical plugs in moderately curved and apically perforated roots. Eighty mesial root canals of mandibular first molars were enlarged up to ProTaper NEXT X5 rotary instrument 2 mm beyond the apical foramen, simulating apical perforations. Specimens were randomly divided into four experimental groups (20 canals per group) according to the material and technique used for root canal obturation: BR/SC, BR/SC with ultrasonic agitation (BR/SC-UA), MF and MF with ultrasonic agitation (MF-UA). The ultrasonic tip was passively inserted into the root canal after the injection of flowable cement and activated for 10 s. The specimens were scanned before and after obturation with a high-resolution micro-computed tomography scanner, and the porosity of the apical plugs was assessed. The differences between groups were analyzed using the Kruskal-Wallis and Mann-Whitney tests, with the significance level set at 5%. None of the obturation materials and techniques used in this study was able to provide a pore-free root canal filling in the apical 5 mm. Considerably higher percentages of open and closed pores were observed in the MF and MF-UA groups, with the highest porosity being in the MF-UA group (p < 0.05). No significant differences were observed between the BR/SC and BR/SC-UA groups, where the quantity of open and closed pores remained similar (p > 0.05).

scholarly journals Comparative evaluation of removal of gutta-percha from root canals with laser using different solvents: An in vitro study

Endodontology ◽  
2019 ◽  
Vol 31 (1) ◽  
pp. 51
Author(s):  
Prashant Monga ◽  
Mona Devi ◽  
Pardeep Mahajan ◽  
ShikhaBaghi Bhandari ◽  
Nitika Bajaj ◽  
...  
Keyword(s):  
Comparative Evaluation ◽  
In Vitro Study ◽  
Vitro Study ◽  
Root Canals ◽  
Gutta Percha

scholarly journals Interfacial adaptation of an epoxy-resin sealer and a self-etch sealer to root canal dentin using the System B or the single cone technique

2012 ◽  
Vol 23 (3) ◽  
pp. 205-211 ◽  
Author(s):  
Bruno Cavalini Cavenago ◽  
Marco Antonio Hungaro Duarte ◽  
Ronald Ordinola-Zapata ◽  
Marina Angélica Marciano ◽  
Aldo Enrique del Carpio-Perochena ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Microscopic Analysis ◽  
Marginal Adaptation ◽  
Root Canals ◽  
Mandibular Molars ◽  
Gutta Percha ◽  
Single Cone ◽  
Rhodamine B Dye ◽  
Root Canal Dentin ◽  
Self Etch

The aim of this laboratory study was to compare the interfacial adaptation of an epoxy-resin and a self-etch sealer in mesial root canals of mandibular molars filled using the System-B/Elements Obturation Unit. Sixty mesial root canals of mandibular molars were prepared using the K3 rotary system up to 35.04 instrument and then filled with the aid of the System-B/Elements Obturation Unit using either gutta-percha/ThermaSeal Plus (n=15) or Resilon/Real Seal SE (n=15). The single cone technique using both materials was used as control. The sealers were stained with Rhodamine B dye and the teeth were filled and sectioned at 2, 4 and 6 mm from the apex. The interfacial marginal adaptation of sealers was evaluated using confocal microscopy. Statistical analyses were performed by the Kruskall-Wallis test (α=0.05). In general, microscopic analysis showed a quite regular gap distribution pattern at sealer-dentin interfaces, mainly for the two groups filled with Real Seal SE. This means that both nonbonding root-filling groups (ThermaSeal Plus) showed significantly higher amount of gap-free regions regardless of the filling technique (p<0.05). Better marginal adaptation was obtained with gutta-percha and epoxy resin-based sealer using either the system B or the single cone technique.

Porosity distribution in root canals filled with gutta percha and calcium silicate cement

2015 ◽  
Vol 31 (9) ◽  
pp. 1100-1108 ◽  
Author(s):  
Amir T. Moinzadeh ◽  
Wilhelm Zerbst ◽  
Christos Boutsioukis ◽  
Hagay Shemesh ◽  
Paul Zaslansky
Keyword(s):  
Calcium Silicate ◽  
Porosity Distribution ◽  
Calcium Silicate Cement ◽  
Root Canals ◽  
Gutta Percha

scholarly journals Adaptation of the single-cone in prepared long oval-shaped canals: a micro-computed tomography study

2021 ◽  
Vol 10 (15) ◽  
pp. e444101523301
Author(s):  
Christianne Velozo ◽  
Hugo Dantas ◽  
Basílio Rodrigues Vieira ◽  
Frederico Barbosa de Sousa ◽  
Victor Felipe Farias do Prado ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Root Canal ◽  
Micro Ct ◽  
Micro Computed Tomography ◽  
Mean Values ◽  
Root Canals ◽  
Gutta Percha ◽  
Working Length ◽  
Single Cone ◽  
Student’S T

The present study aimed to evaluate adaptation of the single gutta-percha cone on root canal walls prepared with the two systems, the XP-endo Shaper (XPS; FKG Dentaire, La Chaux-de-Fonds, Switzerland) and ProTaper Next systems (PTN; Dentsply Sirona, Ballaigues, Switzerland) by using micro-computed tomography (micro-CT) technology. Twenty long oval-shaped canals in mandibular incisors were scanned by micro-CT (Skyscan 1172; Bruker microCT, Kontich, Belgium). Two groups were divided into (n = 10) according to the canal preparation protocol: XPS group with an extra 45 s of instrumentation and PTN group. A gutta percha cone, with respect to the protocol used for each group (size 40, .04 taper, XPS and size 40, .06 taper, PTN) was adapted to the canal at the working length of all the samples, and all root canals were filled, using the single-cone technique. The mean values for volume of voids and percentage relative to the mentioned space were correspondingly higher in XPS group than they were PTN group, mean values for volume of voids (3.61 mm3 - 1.92 mm3) and for percentage of voids (39.25% - 23.28%), respectively, significant differences were recorded (p < 0.05) between the two groups (XPS and PTN, Student’s-t test for homogenous variances and Mann–Whitney test). The canals prepared with XPS, in the procedure performed with an extra 45 s of instrumentation, showed a higher volume of voids than those prepared with the PTN system, in obturation of the root canal with the single cone technique.

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