scholarly journals Comparison of forward and reverse single-file reciprocation for root canal instrumentation in curved mandibular molar canals - a Micro-CT analysis

2020 ◽  
Vol 75 (4) ◽  
Author(s):  
PJ van der Vyver ◽  
M Vorster ◽  
F Paleker ◽  
ZI Vally
Keyword(s):  
Root Canal ◽  
Micro Ct ◽  
Single File ◽  
Mandibular Molar ◽  
Ct Analysis ◽  
Root Canal Instrumentation

scholarly journals Sonic irrigation for removal of calcium hydroxide in the apical root canal: A micro-CT and light-coupled tracking analysis

2021 ◽  
Author(s):  
Wonjoon Moon ◽  
Shin Hye Chung ◽  
Juhea Chang
Keyword(s):  
Calcium Hydroxide ◽  
Root Canal ◽  
Motion Tracking ◽  
Irrigation System ◽  
Analysis Data ◽  
Micro Ct ◽  
Irrigation Systems ◽  
Coupled Motion ◽  
Root Canals ◽  
Ct Analysis

Abstract This study aimed to evaluate the efficacy of three sonic irrigation systems for removal of calcium hydroxide dressing from the apical root canal. A total of 96 single-rooted teeth in three categories of root canal curvatures (straight: 0–5⁰, moderate: 6–20⁰, and severe: > 20⁰ were allocated to four groups: conventional needle irrigation, EndoActivator, EQ-S, and Vibringe. The root canals were instrumented using Protaper NEXT and filled with calcium hydroxide. After removal of calcium hydroxide, the remaining volume of calcium hydroxide was measured by micro-CT analysis. Data were compared among root canal curvatures and irrigation systems using the Kruskal-Wallis test and Mann-Whitney test (p < .05). The oscillating range of each irrigation system was measured using light-coupled motion tracking. The volumes of calcium hydroxide remained in the canals of severe curvature were significantly lower than in those of straight curvature (p < .05). In the canals of moderate or severe curvature, EQ-S showed the highest removal percentage, followed by EndoActivator, Vibringe, and needle irrigation (p < .05). Light-coupled tracking showed the largest oscillating range in EQ-S (p < .05). Sonically activated irrigation systems with a flexible tip can be beneficial for cleaning of intracanal medication in the curved apical canals.

scholarly journals Microtomographic Evaluation of Canal Centralization and Dentine Removal after Canal Preparation with Two Rotary Systems: HyFlex EDM and ProTaper Next

2022 ◽  
Author(s):  
Vivian Ronquete ◽  
Alexandre Sigrist de Martin ◽  
Karin Zuim ◽  
Thais Machado de Carvalho Coutinho ◽  
Eduardo Fagury Videira Marceliano ◽  
...  
Keyword(s):  
Root Canal ◽  
Root Diameter ◽  
Micro Ct ◽  
Micro Computed Tomography ◽  
Type Iv ◽  
Canal Diameter ◽  
Mandibular Molar ◽  
Apical Transportation ◽  
Significant Difference ◽  
Before And After

Abstract Objective This study compared the ProTaper Next (PTN; Dentsply Sirona, Tulsa, Oklahoma, United States) and HyFlex EDM (HEDM; Coltene/Whaledent AG, Alstätten, Switzerland) systems using micro–computed tomography (CT). Materials and Methods Twenty-one mesial roots classified as Vertucci's type IV from extracted mandibular first molars with curvatures between 20 and 40 degrees were selected. The teeth were scanned using a micro-CT before and after root canal preparation by both systems, applied to the same root, in alternating canals. The following parameters were analyzed: canal centering, apical transportation, root canal diameter/root diameter. Results No statistically significant differences between both systems were observed for any of the assessed morphological parameters (p > 0.05). All canals presented diameter enlargement of more than 40% in relation to root diameter in the cervical and middle segments. No statistically significant difference was noted between the HEDM and PTN groups. The wear percentage for the HEDM group in the cervical and middle thirds were 49.66 ± 8.65 and 46.48 ± 14.29, respectively, and 51.02 ± 11.81 and 45.48 ± 10.79 for the PTN group, respectively. Conclusion Both systems displayed similar mandibular molar mesial canals preparation, with no differences noted for any of the assessed parameters. Both groups showed increased canal diameter in the cervical and middle thirds by more than 40%.

A micro-computed tomographic (micro-CT) analysis of the root canal morphology of maxillary third molar teeth

2018 ◽  
Vol 215 ◽  
pp. 83-92 ◽  
Author(s):  
Iwona M. Tomaszewska ◽  
Bartosz Leszczyński ◽  
Andrzej Wróbel ◽  
Tomasz Gładysz ◽  
Hal F. Duncan
Keyword(s):  
Root Canal ◽  
Third Molar ◽  
Micro Ct ◽  
Computed Tomographic ◽  
Maxillary Third Molar ◽  
Ct Analysis ◽  
Molar Teeth ◽  
Root Canal Morphology ◽  
Canal Morphology

scholarly journals Occurence of dentinal defects after root canal preparation with R-phase, M-Wire and Gold Wire instruments: a micro-CT analysis

2017 ◽  
Vol 17 (1) ◽  
Author(s):  
Marcely Cassimiro ◽  
Kaline Romeiro ◽  
Luciana Gominho ◽  
Andressa de Almeida ◽  
Larissa Costa ◽  
...  
Keyword(s):  
Root Canal ◽  
Gold Wire ◽  
Micro Ct ◽  
Root Canal Preparation ◽  
Ct Analysis

scholarly journals Influence of voxel size on micro-CT analysis of debris after root canal preparation

2021 ◽  
Vol 35 ◽  
Author(s):  
Jáder Camilo Pinto ◽  
Fernanda Ferrari Esteves Torres ◽  
Airton Oliveira Santos Junior ◽  
Karina Ines Medina Carita Tavares ◽  
Juliane Maria Guerreiro-Tanomaru ◽  
...  
Keyword(s):  
Root Canal ◽  
Micro Ct ◽  
Root Canal Preparation ◽  
Voxel Size ◽  
Ct Analysis

scholarly journals Marginal gaps and internal voids after root-end filling using three calcium silicate-based materials: A Micro-CT analysis

2021 ◽  
Vol 32 (4) ◽  
pp. 1-7
Author(s):  
Alexander Pompermayer Jardine ◽  
Ketsia Fernanda Váz Rosa ◽  
Felipe Barros Matoso ◽  
Ramiro Martins Quintana ◽  
Renata Grazziotin-Soares ◽  
...  
Keyword(s):  
Root Canal ◽  
Calcium Silicate ◽  
Statistical Difference ◽  
Root Canal Treatment ◽  
Ct Scans ◽  
Micro Ct ◽  
Air Entrapment ◽  
Cavity Preparation ◽  
Ct Analysis

Abstract This study evaluated the 3D quality of root-end filling, assessing the presence (volume and percentage) of marginal gaps and internal voids formed after retro-filling with three calcium silicate-based materials: MTA Angelus (Angelus Soluçoes Odontologicas, Londrina, PR, Brazil), Biodentine (Septodont Ltd., Saint Maur-des-Faussés, France) and Neo MTA Plus (Avalon Biomed Inc., Bradenton, Florida, US). Thirty human, extracted, single rooted teeth were used. Orthograde root canal treatment, root resection (3mm shorter than the apex) and retrograde cavity preparation with ultrasonic tips were performed. Teeth were divided into 3 groups (n =10 each) following a stratified randomization according to the initial volume of the root-end cavity. After retrofilling, samples were stored for 7 days. Then, two rounds of micro-CT scans were performed: soon after root-end preparation (with the cavity still empty) and 7 days after root-end filling. Marginal gaps, internal voids volume (mm3 and %), as well as, the overall defects (sum of gaps and voids) were evaluated. Statistics compared the three groups in relation to those defects. There was not statistical difference between groups regarding the marginal gaps (P≥ 0.05), the internal voids (P≥ 0.05), and the overall defects (P≥ 0.05). Median (mm3) and % of overall air-entrapment defects (gaps and/or voids) was: 0.004mm3 and 1.749% for MTA Angelus, 0.018mm3 and 6.660% for Biodentine, and 0.012mm3 and 4.079% for Neo MTA Plus. All materials had gaps and/or voids. No differences were found between MTA Angelus, Biodentine and Neo MTA Plus.

scholarly journals Micro-CT analysis of dentinal microcracks on root canals filled with a bioceramic sealer and retreated with reciprocating instruments

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Andressa Almeida ◽  
Kaline Romeiro ◽  
Marcely Cassimiro ◽  
Luciana Gominho ◽  
Eugênia Dantas ◽  
...  
Keyword(s):  
Root Canal ◽  
Material Removal ◽  
Filling Material ◽  
Micro Ct ◽  
Root Canal Filling ◽  
Root Canals ◽  
Type Iv ◽  
Ct Analysis ◽  
Ah Plus ◽  
Reciprocating Instruments

Abstract This study aimed to analyze the potential occurrence of dentinal defects after the removal of a root canal filling with two different sealers using Reciproc (RC) or Reciproc Blue (RB). The mesial roots of 60 mandibular molars with a Vertucci type IV configuration were selected. The samples were initially instrumented with Reciproc (R25) and then divided into the following four experimental groups according to the endodontic sealer and retreatment instrument (n = 15): BC Sealer/Reciproc (BCRC); BC Sealer/Reciproc Blue (BCRB); AH Plus/Reciproc (AHRC); and AH Plus/Reciproc Blue (AHRB). Then, the samples were scanned under micro-CT after obturation and removal of the filling material. Two analyses were conducted. First, an evaluation was performed on all the axial images, and another analysis evaluated each millimeter of the 10 mm from the apex. Dentinal defects were observed in all the samples. All of the identified defects in the images after filling material removal were present in the corresponding images after obturation. The use of AH Plus and EndoSequence BC Sealer, and filling material removal using RC and RB instruments did not induce dentinal defects.

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