scholarly journals CT evaluation of apical canal transportation associated with stainless steel hand files, oscillatory technique and ProTaper rotary system

2011 ◽  
Vol 22 (4) ◽  
pp. 288-293 ◽  
Author(s):  
Mateus Silveira Martins Hartmann ◽  
Vânia Regina Camargo Fontanella ◽  
José Roberto Vanni ◽  
Volmir João Fornari ◽  
Fernando Branco Barletta
Keyword(s):  
Computed Tomography ◽  
Oscillatory System ◽  
Maxillary Molars ◽  
Root Curvature ◽  
Ct Evaluation ◽  
Root Dentin ◽  
Canal Transportation ◽  
Spss Software ◽  
Hand Instrumentation ◽  
Root Canal Instrumentation

This study used computed tomography (CT) to compare apical canal transportation in mesiobuccal canals of maxillary molars prepared with different techniques. Sixty teeth were assigned to 3 groups (n=20), according to the technique used for root canal instrumentation: hand instrumentation with K-Flexofiles, K-Flexofiles activated by an oscillatory system and ProTaper NiTi rotary system. Pre and post-instrumentation CT images were obtained 3 mm short of the apical foramen and were superimposed to compare canal transportation. Data were analyzed statistically by ANOVA and Tukey's test using the SPSS software (α=0.05). In the buccal direction, the manual technique produced significantly less canal transportation than the oscillatory technique (p<0.05) and both were similar to the rotary technique (p>0.05). In the distal and distopalatal directions, the oscillatory technique produced more canal transportation (p<0.05). In the mesiopalatal direction, the oscillatory technique produced more canal transportation than the manual technique (p<0.05), and both were similar to the rotary technique (p>0.05). In conclusion, all techniques produced canal transportation, and the oscillatory technique produced the greatest removal of root dentin toward the innerside of the root curvature.

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 Comparison of Canal Transportation and Centric Ability of Two Nickel-Titanium Rotary Systems Using Cone Beam Computed Tomography: An In Vitro Study

2018 ◽  
Vol 6 (02/03) ◽  
pp. 076-079
Author(s):  
Aditi Soni ◽  
Anjali Oak
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
In Vitro Study ◽  
Nickel Titanium ◽  
Cone Beam ◽  
Maxillary Molars ◽  
Canal Transportation ◽  
Group 2 ◽  
Student’S T

Abstract Aim The aim of this study was to compare the canal transportation and canal centric ability of One Shape (Micro Mega, Besançon, France) and Mani Silk (Mani Utsunomiya, Tochigi, Japan) nickel-titanium (NiTi) rotary files in curved canals with the help of cone beam computed tomography (CBCT). Materials and Methods Total 40 mesiobuccal canals of maxillary molars with an angle of curvature ranging between 25 and 45 degrees were divided according to the instrument used in canal preparation into two groups 20 samples each: One Shape (group 1) and Mani Silk (group 2). Pre- and post-instrumentation scans were performed using CBCT (Carestream CS 9300 scanner) to evaluate the transportation and centric ability at apical, middle, and coronal levels using unpaired Student's t-test. Results Mani Silk file showed significantly less canal transportation and better canal centric ability compared to One Shape system. Conclusion Mani Silk file maintained original canal curvature better than One Shape NiTi rotary file.

scholarly journals Characteristics and computed tomography evaluation of primary retroperitoneal tumours: report of 113 cases

2017 ◽  
Vol 99 (1) ◽  
pp. 55-59 ◽  
Author(s):  
W Cheng ◽  
Y Qi ◽  
B Wang ◽  
L Tian ◽  
W Huang ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Clinical Manifestations ◽  
Large Size ◽  
Irregular Margin ◽  
Ct Evaluation ◽  
Surgical Data ◽  
Mean Size ◽  
Spss Software ◽  
Benign Tumours ◽  
Primary Retroperitoneal

INTRODUCTION Benign and malignant primary retroperitoneal tumours (PRT) have different clinical manifestations and pathological characteristics. We explore the characteristics and evaluate the value of computed tomography (CT) for PRT. METHODS Fifty-six benign and fifty-seven malignant PRT with clinical, radiographic and surgical data were retrospectively investigated. Statistical analysis was carried out using SPSS software. RESULTS We found that mean size of benign tumours was 12.4 ± 7.7cm but 20.7 ± 11.6cm in malignant cases (P < 0.05). The accuracy of CT localisation was approximately 70%. The sensitivity and specificity of CT diagnosis for benign tumours were 96% and 85%, respectively; 51 (91%) underwent complete resection among benign cases but 42 (74%) in malignant cases (P < 0.05). Sensitivity of CT evaluation for invaded organs and vessels was 50% and 65%, respectively, and specificity was 88% and 81%, respectively. CONCLUSIONS Large size, no capsule, irregular margin, heterogeneous density and specific enhancement pattern on CT are highly suggestive of malignancy. CT is the most useful tool in assessing the size and characteristics of PRT but it does not have the sensitivity to assess the involvement of organs and vessels.

Canal Transportation after Root Canal Instrumentation: A Comparative Study with Computed Tomography

2007 ◽  
Vol 33 (8) ◽  
pp. 962-965 ◽  
Author(s):  
Mateus Silveira Martins Hartmann ◽  
Fernando Branco Barletta ◽  
Vânia Regina Camargo Fontanella ◽  
José Roberto Vanni
Keyword(s):  
Computed Tomography ◽  
Comparative Study ◽  
Root Canal ◽  
Canal Transportation ◽  
Root Canal Instrumentation

Mind the Gap: Alveolar Bone Graft Revision in the Era of Computed Tomography

2021 ◽  
pp. 105566562110026
Author(s):  
Ema Zubovic ◽  
Gary B. Skolnick ◽  
Abdullah M. Said ◽  
Richard J. Nissen ◽  
Alison K. Snyder-Warwick ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Bone Grafting ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Alveolar Bone ◽  
Tertiary Care ◽  
Radiographic Examination ◽  
Graft Take ◽  
Alveolar Bone Grafting ◽  
Ct Evaluation

Objective: To determine the rate of revision alveolar bone grafting (ABG) in patients with cleft lip and palate (CLP) before and after the introduction of postoperative computed tomography (CT). Design: Retrospective case–control study analyzing the incidence of revision ABG in patients with and without postoperative CT scans for graft success evaluation. Setting: Academic tertiary care pediatric hospital. Patients: Eighty-seven patients with CLP or cleft lip and alveolus treated with autologous iliac crest bone grafting for alveolar clefts over a 10-year period (January 2009 to March 2019) with minimum 6-month follow-up. Fifty patients had postoperative CT evaluation; 37 did not. Interventions: Postoperative CT to determine ABG success, versus standard clinical examination and 2-dimensional radiographs. Main Outcome Measures: Requirement for revision ABG, defined as failure of the original graft by clinical or radiographic examination. Results: Fifty-eight percent of patients underwent a postoperative CT scan at median interval of 10 months after surgery. Patients with postoperative CT evaluation had a 44% rate of revision ABG (22/50) for inadequate graft take, compared to 5% (2/37) in patients without postoperative CT ( P < .001; 95% CT, 31%-58% in the CT group, 1%-16% in the non-CT group). Conclusions: Computed tomography evaluation after ABG is associated with a significantly increased revision rate for inadequate graft take. The presence of a secondary palatal fistula at the time of original ABG is not associated with revision requirement. Lack of standardized dental and orthodontic records complicates the study of ABG outcomes and presents an area for systems-based improvement.

scholarly journals Comparison of Apical Transportation, Centering Ability and Cyclic Fatigue Resistance of Four Rotary File Systems

2015 ◽  
Vol 03 (01) ◽  
pp. 012-019
Author(s):  
Ankita Sood ◽  
Varun Jindal ◽  
Ajay Chhabra ◽  
Arvind Arora ◽  
Ankur Vats
Keyword(s):  
Fatigue Resistance ◽  
Fatigue Testing ◽  
File Systems ◽  
Cyclic Fatigue ◽  
Root Canal Preparation ◽  
Maxillary Molars ◽  
Apical Transportation ◽  
Significant Difference ◽  
Before And After ◽  
Canal Transportation

Abstract Aim: The aim of this study was to evaluate the apical transportation, centering ability and cyclic fatigue resistance of Hero shaper, Twisted file, Hyflex file and RACE rotary file systems. Methods: Mesiobuccal roots of eighty maxillary molars were divided into four groups and instrumented with Hero shaper, Twisted file, Hyflex file and RACE rotary file systems with a final apical size being 25/.04. Apical deviation was assessed by the radiographic platform method that enables obtaining superimposed images of the first and last instrument used in root canal preparation in the same radiograph. Apical transportation was measured in millimeters with the aid of the AUTOCAD 2008 software. Forty canals were sectioned at 7mm from the apex and stereomicroscopic Images were taken at 6x magnification before and after instrumentation for evaluation of centering ability. The cyclic fatigue testing was conducted with the instrumentrotating freely at angles of curvature of 45 degree. Total 10 instruments were tested in each group. The instruments were rotated at 400rpm using the X-smart motor (Dentsply, Maillefer) until fracture occurred. Results: There was no statistically significant difference between the four groups in apical transportation and centering ability whereas twisted files showed the maximum cyclic fatigue resistance. Conclusion: The different rotary file systems provided minimum canal transportation and the twisted file performed significantly better in terms of cyclic fatigue resistance.

scholarly journals Endodontic Management of a Maxillary First Molar with Two Palatal Canals and a Single Buccal Canal: A Case Report

2012 ◽  
Vol 2012 ◽  
pp. 1-4 ◽  
Author(s):  
Leila Atash biz Yeganeh ◽  
Mamak Adel ◽  
Reza Vahedi ◽  
Maryam Tofangchiha
Keyword(s):  
Computed Tomography ◽  
Treatment Outcome ◽  
Case Report ◽  
Cone Beam Computed Tomography ◽  
Cone Beam ◽  
Root Canals ◽  
Type Iv ◽  
Maxillary Molars ◽  
Root Canal Morphology ◽  
Canal Morphology

Thorough knowledge of root canal morphology is essential for the endodontic therapy. There are rare variations in canal number and configuration in maxillary molars, which could affect treatment outcome. This paper presents the endodontic management of a maxillary first molar with two palatal canals in one root (Vertucci type IV) and a single buccal canal. In this paper cone-beam computed tomography was made to asses this morphology. This paper is intended to reinforce clinician’s awareness of the rare morphology of root canals.

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