Micro‐CT evaluation of ‘danger zone’ and microcrack formation in mesial root canals of primary teeth with single‐file rotary and reciprocating systems

2021 ◽  
Author(s):  
Burcu Nihan YÜKSEL ◽  
Ayşenur ÖNCÜ ◽  
Berkan ÇELİKTEN ◽  
Burak BİLECENOĞLU ◽  
Ayşe Işıl ORHAN ◽  
...  
Keyword(s):  
Primary Teeth ◽  
Micro Ct ◽  
Danger Zone ◽  
Root Canals ◽  
Single File ◽  
Ct Evaluation ◽  
Microcrack Formation ◽  
Reciprocating Systems

scholarly journals A micro-CT evaluation of the performance of rotary and reciprocating single-file systems in shaping ability of curved root canals

2020 ◽  
Vol 34 ◽  
Author(s):  
Manoel Damião SOUSA-NETO ◽  
Bruno Monguilhott CROZETA ◽  
Fabiane Carneiro LOPES ◽  
Jardel Francisco MAZZI-CHAVES ◽  
Rodrigo Dantas PEREIRA ◽  
...  
Keyword(s):  
File Systems ◽  
Micro Ct ◽  
Root Canals ◽  
Single File ◽  
Ct Evaluation ◽  
Shaping Ability ◽  
Curved Root Canals

scholarly journals Micro-Computed Tomography (Micro-CT) Evaluation of Effects of Different Rotary Glide Path Techniques on Canal Transportation and Centering in Curved Root Canals

2019 ◽  
Vol 25 ◽  
pp. 6351-6358
Author(s):  
Gabrielė Česaitienė ◽  
Tadas Venskutonis ◽  
Vita Mačiulskienė ◽  
Vaidotas Cicėnas ◽  
Vykintas Samaitis ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Micro Ct ◽  
Micro Computed Tomography ◽  
Root Canals ◽  
Glide Path ◽  
Ct Evaluation ◽  
Canal Transportation ◽  
Curved Root Canals

scholarly journals Dentinal Microcrack Formation after Root Canal Instrumentation by XP-Endo Shaper and ProTaper Universal: A Microcomputed Tomography Evaluation

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Sarah M. Alkahtany ◽  
Ebtissam M. Al-Madi
Keyword(s):  
The Body ◽  
Micro Ct ◽  
Cross Sectional ◽  
Significance Level ◽  
Root Canals ◽  
Type Iv ◽  
Significant Difference ◽  
Before And After ◽  
Microcrack Formation ◽  
Group 2

Aim. To evaluate dentinal microcrack formation on root canals instrumented, continuously in the body temperature, with XP-endo shaper (XPES) and ProTaper Universal (PTU), by means of microcomputed tomographic (micro-CT) analysis. Methodology. Nineteen mesial roots with two separate canals (Vertucci Type IV) of extracted mandibular molars were used in this study. The root canals (N = 38) were divided into 2 groups. Group 1 (n = 19): all MB canals were instrumented with XPES. Group 2 (n = 19): all ML canals were instrumented with PTU. All roots were scanned with micro-CT before and after instrumentation. Two precalibrated examiners evaluated the cross-sectional images of each sample with DataViewer program. The dentinal microcracks (complete and incomplete) were counted in each third of the root for the preinstrumentation and the postinstrumentation images. Wilcoxin signed-rank and Mann–Whitney U tests were used for statistical analysis at a significance level of P<0.05. Results. The number of microcracks increased significantly (P<0.05) after instrumentation with XPES in the middle and cervical thirds. The number of microcracks increased significantly (P<0.05) after instrumentation with PTU in the cervical third only. There was no significant difference between the groups in the cervical and apical thirds. In the middle third, the XPES induced more incomplete microcracks than PTU (P<0.05). Conclusion. Within the limitations of this study, there was no significant difference in the dentinal microcrack formation between XPES and PTU in the apical and cervical thirds of the root. However, XPES instrumentation induced more incomplete microcracks than PTU in the middle third of human roots.

scholarly journals Evaluation of Apically Extruded Debris and Irrigant Produced by Different Nickel-Titanium Instrument Systems in Primary Teeth

2015 ◽  
Vol 16 (11) ◽  
pp. 864-868 ◽  
Author(s):  
Ebru Kucukyilmaz ◽  
Selcuk Savas ◽  
Gokhan Saygili ◽  
Banu Uysal
Keyword(s):  
Primary Teeth ◽  
File System ◽  
File Systems ◽  
Nickel Titanium ◽  
Root Canals ◽  
System A ◽  
Bonferroni Adjustment ◽  
Single File ◽  
Significant Difference ◽  
Irrigation Solution

ABSTRACT Aim The purpose of this study was to determine the amount of extruded debris and irrigant associated with different single-file systems and one multiple-file system. Materials and methods Forty-five newly extracted single rooted primary canine teeth were used in this study. The root canals were instrumented using the reciprocating single-file system, the single-file rotary system and the multiple-file rotary system. A 10–6 precision micro-balance was used to calculate the amount of extruded debris and irrigant. The incubation period was set as 15 days at 37°C to obtain dry debris. The preparation time for instrumentation was also recorded. The data were statistically analyzed by Manova and Bonferroni adjustment. Results Considering the apically extruded debris, while there was statistically significant difference between Reciproc and OneShape groups (p < 0.05), no statistically significant difference was found among the other groups (p > 0.05). In terms of irrigation solution, although significant difference was obtained between the Reciproc and other two groups (p < 0.05), no statistically significant difference was obtained between the two rotary instruments (p > 0.05). Instrumentation was significantly faster using Reciproc than with all other instrument (p < 0.05). Conclusion All systems caused apical debris and irrigant extrusion. Full-sequences rotary instrumentation systems may be preferable for preparation primary teeth. Clinical significance This is the first study carrying out to compare both apical debris and irrigation solution extrusion with reciprocal and rotary single-file systems with other preparation systems in primary teeth. How to cite this article Kucukyilmaz E, Savas S, Saygili G, Uysal B. Evaluation of Apically Extruded Debris and Irrigant Produced by Different Nickel-Titanium Instrument Systems in Primary Teeth. J Contemp Dent Pract 2015;16(11):864-868.

Micro‐CT evaluation of filling of flattened root canals using a new premixed ready‐to‐use calcium silicate sealer by single‐cone technique

2020 ◽  
Author(s):  
Karina I. M. C. Tavares ◽  
Jáder C. Pinto ◽  
Airton O. Santos‐Junior ◽  
Fernanda F. E. Torres ◽  
Juliane M. Guerreiro‐Tanomaru ◽  
...  
Keyword(s):  
Calcium Silicate ◽  
Micro Ct ◽  
Root Canals ◽  
Single Cone ◽  
Ct Evaluation

scholarly journals Micro-CT evaluation of apical enlargement of molar root canals using rotary or reciprocating heat-treated NiTi instruments

2019 ◽  
Vol 27 ◽  
Author(s):  
Jáder Camilo PINTO ◽  
Mariana Mena Barreto PIVOTO-JOÃO ◽  
Camila Galetti ESPIR ◽  
Maria Luiza Gioster RAMOS ◽  
Juliane Maria GUERREIRO-TANOMARU ◽  
...  
Keyword(s):  
Micro Ct ◽  
Root Canals ◽  
Heat Treated ◽  
Ct Evaluation ◽  
Niti Instruments

Effect of Retreatment Instruments on Microcrack Formation: A Microcomputed Tomography Study

2017 ◽  
Vol 40 (3) ◽  
pp. 123-127 ◽  
Author(s):  
Mustafa M. Koçak ◽  
Neslihan Y. Çirakoğlu ◽  
Sibel Koçak ◽  
Baran C. Sağlam ◽  
Ersan Çiçek ◽  
...  
Keyword(s):  
Stainless Steel ◽  
High Resolution ◽  
Microcomputed Tomography ◽  
Filling Material ◽  
Micro Ct ◽  
Root Canals ◽  
Microcrack Formation ◽  
Ct System

Introduction The purpose of this study was to compare the occurrence of microcracks in teeth prepared with different retreatment systems using microcomputed tomography (micro-CT). Methods Forty-two freshly extracted mandibular premolar teeth were used. The root canals were instrumented with stainless steel K-files to an apical size of 35/.02 using the balanced-force technique and were obturated using the passive compaction technique. The specimens were divided into 3 experimental groups according to retreatment system used (n = 14): ProTaper Universal retreatment (PTUR), Mtwo retreatment (MTR), or D-RaCe retreatment (D-RC) systems. Each specimen was scanned using a high-resolution micro-CT system before instrumentation, after obturation, and after the removal of the filling material. The images were evaluated, and the presence of microcracks was recorded. Results The PTUR system demonstrated the highest percentage, while MTR and D-RC retreatment systems resulted in similar numbers of microcracks. Conclusions Clinicians should be aware that all retreatment systems may cause microcracks.

scholarly journals Micro-CT Evaluation of Root and Canal Morphology of Mandibular First Premolars with Radicular Grooves

2017 ◽  
Vol 28 (5) ◽  
pp. 597-603 ◽  
Author(s):  
Emanuele Boschetti ◽  
Yara Terezinha Correa Silva-Sousa ◽  
Jardel Francisco Mazzi-Chaves ◽  
Graziela Bianchi Leoni ◽  
Marco Aurélio Versiani ◽  
...  
Keyword(s):  
Surface Area ◽  
Root Canal ◽  
Two Dimensional ◽  
Micro Ct ◽  
Cross Sectional ◽  
Sample Mean ◽  
Percentage Frequency ◽  
Root Canals ◽  
Ct Evaluation ◽  
Dimensional Parameters

Abstract The aim of this study was to evaluate morphological features of 70 single-rooted mandibular first premolars with radicular grooves (RG) using micro-CT technology. Teeth were scanned and evaluated regarding the morphology of the roots and root canals as well as length, depth and percentage frequency location of the RG. Volume, surface area and Structure Model Index (SMI) of the canals were measured for the full root length. Two-dimensional parameters and frequency of canal orifices were evaluated at 1, 2, and 3 mm levels from the apical foramen. The number of accessory canals, the dentinal thickness, and cross-sectional appearance of the canal at different root levels were also recorded. Expression of deep grooves was observed in 21.42% of the sample. Mean lengths of root and RG were 13.43 mm and 8.5 mm, respectively, while depth of the RG ranged from 0.75 to 1.13 mm. Mean canal volume, surface area and SMI were 10.78 mm3, 58.51 mm2, and 2.84, respectively. Apical delta was present in 4.35% of the sample and accessory canals were observed mostly at the middle and apical thirds. Two-dimensional parameters indicated an oval-shaped cross-sectional appearance of the root canal with a high percentage frequency of canal divisions (87.15%). Canal configuration type V (58.57%) was the most prevalent. C-shaped configuration was observed in 13 premolars (18.57%), whereas dentinal thickness ranged from 1.0 to 1.31 mm. Radicular grooves in mandibular first premolars was associated with the occurrence of several anatomical complexities, including C-shaped canals and divisions of the main root canal.

Micro-CT evaluation of voids using two root filling techniques in the placement of MTA in mesial root canals of Vertucci type II configuration

2017 ◽  
Vol 22 (5) ◽  
pp. 1907-1913 ◽  
Author(s):  
Ali Keleş ◽  
Mahmoud Torabinejad ◽  
Cangül Keskin ◽  
Dongjin Sah ◽  
İsmail Uzun ◽  
...  
Keyword(s):  
Type Ii ◽  
Micro Ct ◽  
Root Canals ◽  
Ct Evaluation
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