scholarly journals Volume Percentage of Filling Voids in Root Canals Prepared by a Novel Nickel-Titanium Rotary System (TruNatomy) Using Two Different Obturation Techniques

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3846
Author(s):  
You Jin Lee ◽  
Sunil Kim ◽  
Su-Jung Shin
Keyword(s):  
Continuous Wave ◽  
Lower Number ◽  
Nickel Titanium ◽  
Volume Percentage ◽  
Mean Values ◽  
Root Canals ◽  
Single Cone ◽  
Lower Volume ◽  
The Mean ◽  
Apical Area

This study aimed to compare the volume percentage of filling voids in root canals prepared with a newly introduced rotary system, TruNatomy (Dentsply Maillefer), and obturated by the modified continuous wave (CW) or single cone (SC) filling technique. Plastic tooth models with four canals were enlarged by using TruNatomy files and randomly allocated into either the CW or SC group. The volume percentage of filling voids at 1–6 mm from the apex was analyzed by using microcomputed tomography; mean values were compared by using independent two-sample t-tests (p < 0.05). The mean volume percentages of the filling voids were 2.81 ± 1.11% and 1.77 ± 0.82% in the CW and SC groups, respectively. In the apical area (1–4 mm), volume percentages in the palatal were significantly different between the CW and SC groups; in the middle area (4–6 mm), volume percentages in the palatal and mesiobuccal 2 canals were significantly different (p < 0.05). The SC group showed lower volume percentages of filling voids than the CW group. The canals prepared by the TruNatomy system can be obturated well by both the SC and CW techniques. The SC technique showed a lower number of voids, especially in the palatal canals.

scholarly journals Safety and Effectiveness of Additional Apical Preparation using a Rotary Heat-treated Nickel–Titanium file with Larger Diameter and Minimum Taper in Retreatment of Curved Root Canals

2021 ◽  
Author(s):  
Jader Camilo Pinto ◽  
Fernanda Ferrari Esteves Torres ◽  
Airton Oliveira Santos-Junior ◽  
Marco Antonio Hungaro Duarte ◽  
Juliane Maria Guerreiro-Tanomaru ◽  
...  
Keyword(s):  
Fatigue Resistance ◽  
Continuous Wave ◽  
Cyclic Fatigue ◽  
Nickel Titanium ◽  
Filling Material ◽  
Root Canals ◽  
Filling Materials ◽  
Heat Treated ◽  
Before And After ◽  
Curved Root Canals

Abstract Objective The aim of this study was to investigate the effect of additional apical preparation using the ProDesign Logic (PDL) 50/.01 rotary heat-treated nickel–titanium (NiTi) file with a larger diameter and minimal taper for retreatment of curved root canals. Materials and Methods Mesial curved root canals of 12 mandibular molars were prepared using PDL 25/.06 and filled using the continuous wave of condensation technique and AH Plus sealer. After retreatment using ProDesign S (PDS) 25/.08, PDL 25/.06 and PDL 35/05, a complementary procedure was performed with PDL 50/.01. Microcomputed tomography (micro-CT) scanning was performed before and after retreatment procedures. The cyclic fatigue resistance of unused PDS 25/.08, PDL 25/.06, PDL 35/.05 and PDL 50/.01 instruments (n = 12) was evaluated in a stainless-steel device. Statistical Analysis Data on the volumes of the root canals and the remaining filling materials were submitted to the paired t-test. Cyclic fatigue resistance data was submitted to one-way ANOVA and Tukey’s tests (α = 0.05). Results Use of PDL 50/.01 decreased the remaining filling materials in the apical third (p < 0.05). The root canal volume was similar in the cervical and middle thirds before and after preparation using PDL 50/.01 (p > 0.05). PDL 50/.01 presented the highest cyclic fatigue resistance (p < 0.05). Conclusions Use of the PDL 50/.01 instrument as an additional apical preparation for retreatment of curved root canals improved filling material removal in the apical third, while maintaining the dentin in the cervical and middle thirds. In addition, PDL 50/.01 presented high-flexural resistance.

scholarly journals Comparison of Obturation Removal Efficiency from Straight Root Canals with ProTaper Gold or Reciproc Blue: A Micro-Computed Tomography Study

2020 ◽  
Vol 9 (4) ◽  
pp. 1164 ◽  
Author(s):  
Vicente Faus-Matoses ◽  
Cristina Pasarín-Linares ◽  
Ignacio Faus-Matoses ◽  
Federico Foschi ◽  
Salvatore Sauro ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Removal Efficiency ◽  
Continuous Wave ◽  
Descriptive Analysis ◽  
Nonparametric Tests ◽  
Micro Computed Tomography ◽  
Human Teeth ◽  
Root Canals ◽  
Before And After ◽  
The Mean

Background: The objective was to evaluate the efficiency of ProTaper Gold (PTG) and Reciproc Blue (RB) NiTi files in obturation material removal from straight root canals assessed by micro-computed tomography. Methods: Fifty-two anterior human teeth were shaped with a PTG rotary system until F2 (25/.08). Specimens were obturated with a continuous wave of condensation technique. For retreatment, specimens were randomly distributed in two experimental groups: PTG group (F4 file) and RB (R40 file). Micro-CT scans were performed before and after retreatment procedures. The percentage of the remaining obturation material compared to the original volume was calculated, as well as the retreatment time. The presence of separated files was recorded. A descriptive analysis was carried out, and nonparametric tests were employed. Results: The mean percentages of remaining obturation material in the PTG group and the RB group were 4.14 ± 4.30% and 4.18 ± 4.29%, respectively. The mean retreatment times for the PTG and RB groups were 144 ± 51 and 163 ± 88 s, respectively. There were no statistically significant differences, neither in removal efficiency (p > 0.05) nor in retreatment time (p > 0.05), between the two groups. The coronal and middle thirds presented significantly more remaining obturation material than the apical third (p < 0.05). No file separation occurred. Conclusions: ProTaper Gold and Reciproc Blue present with comparable efficiency in removing the obturation material, with a similar mean retreatment time.

scholarly journals Second Root Canal in Mandibular Incisors: an Ex Vivo Cone-Beam Computed Tomography (CBCT) Study

2018 ◽  
Vol 22 (1) ◽  
pp. 38-42
Author(s):  
Maria Elpida Kalaitzoglou ◽  
Eleni Kantilieraki ◽  
Charalampos Beltes ◽  
Christos Angelopoulos ◽  
Panagiotis Beltes
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Root Canal ◽  
Ex Vivo ◽  
Cone Beam ◽  
Mean Values ◽  
Root Canals ◽  
The Mean ◽  
Type 3 ◽  
Mandibular Incisors

SummaryBackground/Aim: To analyze the internal morphology of mandibular incisors with two root canals using cone-beam computed tomography (CBCT). Material and Methods: 289 (143 central and 146 lateral) extracted intact mandibular incisors were radiographed for detection of a second root canal. The teeth presenting a second root canal were imaged with CBCT and evaluated regarding: root canal type, the distance of the cementoenamel junction (CEJ) to the bifurcation of the canals and the distance of the canal fusion to the apical foramen (in teeth in which canals rejoined). Results: Out of 143 central and 146 lateral mandibular incisors, 41 (28.7%) and 44 (30.1%) teeth respectively showed a second root canal. Types II, III, V and an additional type to Vertucci’s classification were identified. Type III was the most prevalent and presented in 30 (73.2%) central and 34 (77.3%) lateral mandibular incisors with two root canals. The mean values of the distance of the CEJ to the canal bifurcation were 4.2 mm and 4.0 mm for central and lateral mandibular incisors respectively. The mean values of the distance of the canal fusion to the apical foramen 5.5 mm and 5.1 mm for central and lateral mandibular incisors respectively. Conclusions: Mandibular incisors with two root canals mainly present with Vertucci’s Type 3 canal configuration. The canal bifurcation was identified mostly at the coronal and middle thirds of the root, while the canal fusion occurred in the middle third of the root.

scholarly journals The shaping advantage of M-wire compared with conventional nickel-titanium rotary instruments in heavy curvature canal

2020 ◽  
Author(s):  
Mika Tanaka-Sato ◽  
Noriko Mutoh ◽  
Kaori Shimojima ◽  
Nobuyuki Tani-Ishii
Keyword(s):  
Root Canal ◽  
Nickel Titanium ◽  
Canal Wall ◽  
Root Canals ◽  
Rotary Instruments ◽  
The Mean ◽  
Canal Shaping ◽  
Shaping Ability

Abstract Background The purpose of this study was to evaluate the shaping advantage of M-wire NiTi ProTaper NEXT (PTN) compared with a conventional NiTi ProTaper Universal (PTU) file in heavy curvature canal. The shaping ability was measured by the amount of canal cutting and transportation between the PTN and conventional PTU. Methods Root canal shaping by the PTN and conventional PTU was classified into two experimental groups according to the final tip size, ISO #25 or ISO #40. Eighty-four J-shaped root canals (10°, 20°, 30° apical curvature) in resin block were used. Results After adjusting for the level and canal wall side, the mean transportation did not significantly decrease between the PTN and PTU with ISO #25. Significantly less deviation occurred with the PTN and PTU between 10° and 30° using ISO #40. Conclusions The M-Wire NiTi PTN improves file flexibility and enables accurate canal shaping for heavy curvature canals.

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.

scholarly journals Apical displacement produced by rotary nickel-titanium instruments and stainless steel files

2004 ◽  
Vol 12 (1) ◽  
pp. 51-55 ◽  
Author(s):  
José Roberto Vanni ◽  
Diana Santana de Albuquerque ◽  
Cristina Reiss ◽  
Flares Baratto Filho ◽  
Orlando Limongi ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Mean Value ◽  
Nickel Titanium ◽  
Mean Values ◽  
Root Canals ◽  
Group 4 ◽  
Group 5 ◽  
Group 2 ◽  
File Series ◽  
Apical Displacement

The aim of this study was to evaluate the apical displacement produced by different rotary nickel-titanium instruments, testing the hypothesis that rotary systems with nickel-titanium instruments produce lower mean values of apical displacement than stainless steel hand instruments. A total of 100 maxillary permanent first molars were selected for the study. The mesiobuccal roots were sectioned at the top cervical third and embedded in blocks of self-curing resin. The specimens were randomly divided into 5 groups and the root canals were prepared using the following nickel-titanium instruments: Group 1 - Quantec system 2000 (Analytic Endodontics, Mexico); Group 2 - Pro-File T.0.04 (Dentsply/Maillefer, Switzerland); Group 3 - Pro-File Series 29 T.0.04 (Dentsply Tulsa, Switzerland); Group 4 - Pow-R T.0.02 (Moyco-Union Broach, USA). Specimens in Group 5 were prepared using stainless steel hand instruments Flexofile (Dentsply/Maillefer, Switzerland). All root canals were previously submitted to cervical preparation using Orifice Shaper instruments #1, 2, 3 and 4 (Dentsply/Maillefer, Switzerland). After odontometry, the remaining root canal was shaped employing increasingly larger instruments, so that the final instrument corresponded to Quantec #9, Pro-File Series 29 #6, and #35 for the other groups. Specimens in Groups 1 to 4 were prepared using an electric handpiece with 16:1 reduction at 350 rpm. The specimens in Group 5 were manually prepared. Apical displacement was measured and recorded by means of radiographic superimposition on a specific desk. Statistical analysis (ANOVA) of the results revealed that all groups presented apical displacements. Considering only the nickel-titanium instruments, Group 4 showed the lowest mean value while Groups 2 and 3 produced the highest mean apical displacement values (p<0.001).

scholarly journals Comparative Analysis of Root Dentin Loss when Using Modern Mechanical Cleaning Instruments in Immature Permanent Teeth

Folia Medica ◽  
2020 ◽  
Vol 62 (2) ◽  
pp. 352-357
Author(s):  
Krasimir Hristov ◽  
Natalia Gateva ◽  
Nikolay Ishkitiev ◽  
Liliya Doitchinova
Keyword(s):  
Root Canal ◽  
Permanent Teeth ◽  
Micro Computed Tomography ◽  
Mean Values ◽  
Root Canals ◽  
Immature Teeth ◽  
Significant Difference ◽  
Before And After ◽  
The Mean ◽  
Mechanical Cleaning

Introduction: The full decontamination and disinfection of the root canal system is essential for the success of regenerative endodontic procedures. The current literature does not have information regarding mechanical cleaning of immature teeth with contemporary endodontic instuments. Aim: To compare the thickness and volume of the dentin removed from the roots of immature teeth after endodontic preparation using XP-endo Finisher, GentleFile Brush and a standard H-file scraping technique through micro-computed tomography. Methods: The study included 51 immature permanent molars. Endodontic access was prepared and without performing preliminary extirpation of the pulp, the teeth were divided into three groups. The first group of teeth were instrumented for two minutes with XP-endo Finisher, the second - two minutes with Gentlefile Brush, in the third group the root canals walls were scraped with a No. 40 H-file. The thickness and the volume of the removed dentin was assessed using micro-CT imaging before and after the use of the instruments. Results: There is no statistically significant difference in the mean values of thickness of dentin removed between the teeth, prepared with XP-endo finisher and Gentlefile Brush. When comparing the mean values of volume of dentin removed between the separate groups, a statistically significant difference was discovered for every compared pair with the highest volume of removed dentin in the group prepared with a hand instrument. Conclusion: The endodontic systems tested when used in immature permanent teeth remove significantly less quantity of hard dental structures compared to a hand file for scraping the root canal.

scholarly journals In Vitro Microleakage Evaluation of Bioceramic and Zinc-Eugenol Sealers with Two Obturation Techniques

Coatings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 727
Author(s):  
Francesco De Angelis ◽  
Camillo D’Arcangelo ◽  
Matteo Buonvivere ◽  
Rachele Argentino ◽  
Mirco Vadini
Keyword(s):  
Continuous Wave ◽  
Tricalcium Silicate ◽  
Blue Dye ◽  
Mean Values ◽  
Dye Penetration ◽  
Single Cone ◽  
Level Of Significance ◽  
Nail Varnish

Aim of the study is to compare the quality of the apical seal offered by a zinc-eugenol and a tricalcium-silicate-based sealer, both used with the single-cone or with the continuous wave of condensation technique. Forty central incisors were divided into four groups (n = 10), according to the two sealers and the two obturation techniques under investigation, and their outer surface was isolated with nail varnish. After endodontic treatment, samples were immersed in methylene blue dye for 72 h, then included in self-curing resin and sectioned to longitudinally expose the canal apical third. The depth of dye penetration was measured in each group. Mean values were compared by two-way-ANOVA test. Multiple comparisons were performed by Tukey test. The level of significance was set at 0.05 in all tests. The continuous wave of condensation technique led to reduced microleakage. Moreover, dye penetration values were reduced for the tricalcium-silicate sealer. In terms of microleakage, the warm continuous wave of condensation technique seems promising even when combined to a bioceramic sealer.

scholarly journals Comparison of shaping ability of ProTaper Next and 2Shape nickel—titanium files in simulated severe curved canals

2019 ◽  
Vol 32 (2) ◽  
pp. 52-56
Author(s):  
Simone Staffoli ◽  
Taha Ozyurek ◽  
Avi Hadad ◽  
Alex Lvovsky ◽  
Michael Solomonov ◽  
...  
Keyword(s):  
Computer Software ◽  
Nickel Titanium ◽  
Significance Level ◽  
Root Canals ◽  
Photographic Camera ◽  
Mean Centering ◽  
Significant Difference ◽  
The Mean ◽  
Niti Instruments ◽  
Shaping Ability

Aim: To evaluate the centering ability of ProTaper Next (PTN) and 2Shape (TS) nickel—titanium (NiTi) instruments in terms of maintaining the original root canal configuration in a simulated tooth with severe curvature. Methodology: Twenty standardized simulated curved root canals were prepared to an apical size of 0.25 mm using PTN and TS (n = 10 canal/group) nickel-titanium files. A gig was constructed to enable reproducible image acquisition using a photographic camera. Pre- and post-instrumented images were recorded and superimposed using a computer software. The ability of the instruments to remain centered in the canal was determined by calculating a centering ratio at three independent points of the simulated canal: coronal, middle and apical third of the curvature, using a computer software. Statistical analysis was performed using one-way analysis of variance (ANOVA) followed by independent sample t-test at 5% significance level. Results: No significant difference was found between the two systems (p > 0.05). At the apical third, the mean centering ratio was significantly higher than the centering ratio of the coronal and the middle thirds in both TS and PTN (p < 0.05). Conclusions: There were no significant differences in the centering ability of the ProTaper Next and 2Shape systems in simulated severe curved canals. Both systems exhibited some degree of transportation, especially in the apical third.

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