Numerical analysis of WaveOne Gold and 2Shape endodontic files during root canal treatment

2022 ◽  
pp. 095441192110689
Author(s):  
Vinod Singh Thakur ◽  
Pavan Kumar Kankar ◽  
Anand Parey ◽  
Arpit Jain ◽  
Prashant Kumar Jain
Keyword(s):  
Mechanical Behaviour ◽  
Root Canal ◽  
Computer Aided Design ◽  
Elastic Strain ◽  
Niti Alloy ◽  
Equivalent Stress ◽  
Element Model ◽  
Root Canal Treatment ◽  
Total Deformation ◽  
Explicit Dynamic

This study aims to develop and analyse a finite element model of the endodontic nickel-titanium (NiTi) instrument during the root canal treatment (RCT). The 3D model of the tooth and the endodontic instrument has been created using computer-aided design software. The nonlinear explicit dynamic analysis in the CAE package (ANSYS) has been used to analyse the mechanical behaviour of endodontic instruments such as total deformation, equivalent elastic strain, and equivalent stress during canal preparation. The mechanical behaviour of three commercially available endodontic NiTi alloy instruments such as WaveOne Gold (WOG), 2Shape 1 (TS1) and 2Shape 2 (TS2) endodontic files was evaluated using FEA. Consequently, the effect of deformation, equivalent stress and equivalent elastic strain on endodontic files during cleaning and shaping are investigated and compared. The results show that the total deformation and equivalent elastic strain are maximum in the TS1 endodontic file in comparison to TS2 and WOG files. Graphical abstract [Formula: see text]

scholarly journals Enhancing Structural Stability of Submerged Cylindrical Shell with Stiffeners

2019 ◽  
Vol 8 (4) ◽  
pp. 11317-11325
Keyword(s):  
Shear Stress ◽  
Cylindrical Shell ◽  
Material Properties ◽  
Elastic Strain ◽  
Cylindrical Shells ◽  
Equivalent Stress ◽  
Extensive Study ◽  
The Other ◽  
Total Deformation ◽  
Explicit Dynamic

An extensive study is made on the buckling types and conditions of various types cylindrical shells based on their design and material properties. Based on those, numerical analysis is done on a submerged type of cylindrical shell. This analysis is done based on two different conditions. The first one includes design with the addition of stiffeners and the other is based on the design which has no stiffeners. A comparative study is performed between these two and the results are analyzed. Two cylindrical shells, one including stringer and the other without a stringer are modeled using CATIA with specific dimensions. These models are imported into ANSYS to perform an explicit dynamic analysis. Parameters such as equivalent stress, equivalent elastic strain, shear stress, shear elastic strain and total deformation are calculated. The end results are obtained using ANSYS and the graphs are plotted using the values obtained. Based on the results obtained, it is concluded that the use of stiffeners makes the structure widely enviable to bear compressive types of loads. Also, it gives additional strength to the structure with sturdiness at the top and bottom layers. Based on the study, it can be concluded that the use of rectangular type stringer is preferred much more than the other types.

BIOMECHANICAL STABILITY OF THE CERVICAL SPINE AFTER UNCINATE PROCESS RESECTION: A FINITE ELEMENT ANALYSIS

2015 ◽  
Vol 15 (06) ◽  
pp. 1540049 ◽  
Author(s):  
XUEFENG BO ◽  
XI MEI ◽  
HUI WANG ◽  
WEIDA WANG ◽  
ZAN CHEN ◽  
...  
Keyword(s):  
Finite Element ◽  
Cervical Spine ◽  
Equivalent Stress ◽  
Three Dimensional ◽  
Element Model ◽  
Uncinate Process ◽  
Total Deformation ◽  
Maximum Equivalent Stress ◽  
Left And Right ◽  
The Stability

When performing anterolateral foraminotomy for the treatment of cervical spondylotic radiculopathy, the extent of uncinate process resection affects the stability of the cervical spine. The aim of this study was to determine the stability of the cervical spine after resection of various amounts of the uncinate process. Based on computed tomography (CT) scans of an adult male volunteer, a three-dimensional geometric model of the cervical spine (C4-C6) was established using Mimics 13.1, SolidWorks 2012, and ANSYS 15.0 software packages. Next, the mechanical parameters of the tissues were assigned according to their different material characteristics. Using the tetrahedral mesh method, a three-dimensional finite element model of the cervical spine was then established. In modeling uncinated process resection, two excision protocols were compared. The first excision protocol, protocol A, mimicked the extent of resection used in current clinical surgical practice. The second excision protocol, protocol B, employed an optimal resection extent as predicted by the finite element model. Protocols A and B were then used to resect the left uncinate process of the C5 vertebra to either 50% or 60% of the total height of the uncinate process. The stability of the cervical spine was assessed by evaluating values of deformation and maximum equivalent stress during extension, flexion, lateral bending, and rotation. After protocol A resection, the total deformation was increased as was the maximum equivalent stress during left and right rotation. After protocol B resection, the total deformation was little changed and the maximum equivalent stress was visibly decreased during left and right rotation. As evidenced by these results, protocol B resection had relatively little effect on the stability of the cervical spine, suggesting that resection utilizing the limits proposed in protocol B appears to better maintain the stability of the cervical spine when compared with current clinical surgical practice as replicated in protocol A.

Finite Element Analysis of Hydraulic Clipping Machine Shear Platform Dased on ANSYS

2014 ◽  
Vol 945-949 ◽  
pp. 190-193
Author(s):  
Hai Lin Wang ◽  
Yi Hua Sun ◽  
Ming Bo Li ◽  
Gao Lin ◽  
Yun Qi Feng ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Distribution ◽  
Elastic Strain ◽  
Optimization Design ◽  
Equivalent Stress ◽  
Element Model ◽  
Element Analysis ◽  
Maximum Equivalent Stress

Q43Y-85D type crocodile hydraulic clipping machine was taken as research object to optimization design. A finite element model for clipping machine was built using shell unit as fundamental unit. ANSYS12.0 finite element method was used to analyze the deformation and stress distribution of the shear platform model of hydraulic clipping machine. The result showed that the maximum equivalent stress at the dangerous area was 368.162 MPa and the maximum elastic strain was 0.1814×10-2 mm. After the structural optimization design, it was found that the maximum equivalent stress decreased to 186.238 MPa which did not exceed the material’s yield limitation 215 MPa and the maximum elastic strain decreased to 0.919×10-3 mm which satisfied the requirement of stiffness.

scholarly journals Treatment outcome following a single-visit coronal indirect restoration by a CAD/CAM technique in endodontically treated teeth with coronal contamination:  A pilot retrospective study

2020 ◽  
Author(s):  
Xinwei Lin ◽  
Danlu Chi ◽  
Zhongchun Tong
Keyword(s):  
Root Canal ◽  
Computer Aided Design ◽  
Clinical Investigation ◽  
Root Canal Treatment ◽  
Radiographic Examination ◽  
Computer Assisted ◽  
Endodontically Treated Teeth ◽  
Single Visit ◽  
Clinical Scenarios ◽  
Cad Cam

Abstract Background It is not uncommon that coronal contamination might take place in some clinical cases of ETT following improper treatment choices. This clinical investigation evaluated the outcome of endodontically treated teeth (ETT) with adequate root canal treatment and less than 12 months of coronal contamination by only a single-visit coronal indirect restoration. Methods Twenty-five patients with less than 12 months of coronal contamination following adequate root canal treatment were selected in the period from June 2016 to June 2018, and a single-visit coronal coverage restoration was performed by a chairside computer-aided design/computer-assisted manufactured (CAD/CAM) technique. The clinical outcome was evaluated by radiographical and clinical examination at 1 ~ 3 years recall. Results Twenty-three patients paid a return visit at 1 ~ 3 years recall. All teeth showed no clinical symptoms and no sensitivity to percussion through single-visit coronal coverage restoration, and the radiographic examination showed no change in comparison to the preoperative perirapical X-ray. Three typical clinical scenarios are presented in detail. Conclusions Coronal contamination may not be a unique indicator of endodontic retreatment, and clinicians should evaluate the quality of pre-existing endodontic treatment by radiographical and clinical conditions to determine whether retreatment is necessary.

The Lightweight Design and Improvement of Aluminum Alloy Automobile Wheel

2011 ◽  
Vol 63-64 ◽  
pp. 189-192 ◽  
Author(s):  
Ying Shi ◽  
Liang Wang ◽  
Peng Yu
Keyword(s):  
Aluminum Alloy ◽  
Elastic Strain ◽  
Maximum Stress ◽  
Lightweight Design ◽  
Equivalent Stress ◽  
Allowable Stress ◽  
Total Deformation ◽  
Element Analysis ◽  
Automobile Wheel ◽  
Ansys Workbench

This paper models the auto wheel by UG, and made analysis through ANSYS Workbench software. The result of finite element analysis shows that the maximum stress is much less than the allowable stress of aluminum alloy wheels. So auto wheels can be optimized further. Then structural optimization is made to minimize the weight of the wheel. The static analysis and fatigue analysis to the optimized wheel is made then. The results of equivalent stress, equivalent elastic strain and total deformation are similar with the results that before optimize, but its weight is decreased. It gains the goal of lighting weight, decreasing fuel consumption and reducing pollution.

SAF file: It's really three dimensional file

2018 ◽  
Vol 14 (1) ◽  
pp. 1
Author(s):  
Prof. Dr. Jamal Aziz Mehdi
Keyword(s):  
Cross Section ◽  
Root Canal ◽  
Three Dimensional ◽  
Circular Cross Section ◽  
Circular Motion ◽  
Root Canal Treatment ◽  
Metal Core ◽  
Rotating Blade

The biological objectives of root canal treatment have not changed over the recentdecades, but the methods to attain these goals have been greatly modified. Theintroduction of NiTi rotary files represents a major leap in the development ofendodontic instruments, with a wide variety of sophisticated instruments presentlyavailable (1, 2).Whatever their modification or improvement, all of these instruments have onething in common: they consist of a metal core with some type of rotating blade thatmachines the canal with a circular motion using flutes to carry the dentin chips anddebris coronally. Consequently, all rotary NiTi files will machine the root canal to acylindrical bore with a circular cross-section if the clinician applies them in a strictboring manner

Root Canal Treatment of A Maxillary Canine With Two Root Canals: a Case Report

2012 ◽  
Vol 2 (8) ◽  
pp. 406-407
Author(s):  
Dr. Ramta Bansal ◽  
◽  
Dr. Aditya Jain ◽  
Dr. Ramta Bansal
Keyword(s):  
Case Report ◽  
Root Canal ◽  
Root Canal Treatment ◽  
Maxillary Canine ◽  
Root Canals

2% Chlorhexidine in root canal treatment: A review

2020 ◽  
Vol 3 (12) ◽  
Author(s):  
Dr. Vishal Thakur ◽  
Dr. Manpreet Kaur ◽  
Priyanka Jamwal ◽  
Bharti Thakur
Keyword(s):  
Root Canal ◽  
Root Canal Treatment ◽  
Number Of Microorganisms ◽  
By Products

Abstract- - Microorganisms and their by-products are considered to be the major cause of pulp and peri-radicular pathologies, and for the dis-infection of these canals we need proper shaping, cleaning of these canals with mechanical instruments and chemical irrigants. Here we are discussing about the chlorohexidine with a concentration of 2% in root canal treatment. It has been found that there is a highly significant reduction in the number of microorganisms in the chlorhexidine-treated specimens after instrumentation and irrigation. Here we will discuss the merits and de-merits of chlorhexidine and its use in root canal as an irrigant or medicaments.

Retrieval of fractured Endodontic Instrument under dental operating microscope using ultrasonic tips : A Case Report

2020 ◽  
Vol 11 (3) ◽  
pp. 3316-3321
Author(s):  
Samrudhi Khatod ◽  
Anuja Ikhar ◽  
Pradnya Nikhade ◽  
Manoj chandak
Keyword(s):  
Case Report ◽  
Root Canal ◽  
Fracture Resistance ◽  
Root Canal Treatment ◽  
Operating Microscope ◽  
Severe Loss ◽  
Mechanical Procedure ◽  
Root Dentin ◽  
Fracture Level

A Patient came with the complaint of pain in the lower right back region of the jaw. Root canal treatment was planned. While preparing for the bio-mechanical procedure, the Hand pro taper fractured in the apical third. Iatrogenic occurred as a result of the fracture of the endodontic instrument. Retrieval of the fractured instrument was planned to complete the cleaning and shaping of the canal. The removal of the fractured instrument was planned to be done under the Dental Operating Microscope. The use of an operating microscope enhanced the illumination and the magnification of the instrument. This illumination and magnification helped in the precision of removal. The ultrasonic tip enabled to reach of the fractured instrument in the canal and loosen the dentin around the fractured instrument. It allowed easy retrieval of the fractured instrument. During the retrieval procedure, the fractured instrument was bypassed before the use of the ultrasonic tip. After the removal of the fractured instrument, cleaning and shaping were completed, followed by obturation, definitive restoration, and prosthesis. As the removal of the fractured instrument enabled complete cleaning and shaping, it improved the prognosis of the case. When the endodontic instrument gets fractured, it should be analyzed over the radiograph to assess the fracture level, the anatomy of the root canal, size of the fractured instrument, check accessibility, stage of fracture, etc. If all the above criteria are met with the removal of the instrument only then, replacement should be tried. Otherwise, it may lead to a severe loss of root dentin, decreasing fracture resistance of the root.

Inhibition Effect Extract Stolephorus insularis as a Antimicroba in Staphylococcus aereus Bacteria

DENTA ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. 22
Author(s):  
Ayu Listya ◽  
Yulie Emilda Akhwan
Keyword(s):  
Staphylococcus Aureus ◽  
Root Canal ◽  
Quantitative Research ◽  
Media Culture ◽  
Root Canal Treatment ◽  
Research Needs ◽  
Dmso Solution ◽  
Entire Surface ◽  
Inhibition Effect ◽  
Inhibitory Power

<pre><em><strong>Background :</strong> U</em><em>ntreated caries will continue and microorganisms enter the pulp resulting in an inflammatory response and pulp necrosis. Sterilization is one part of root canal treatment and is important for the success of root canal treatment. Stolephorus insularis contains antibacterial substances such as fluor. Previous research showed that extract Stolephorus insularis has antibacterial activity in Streptococcus mutans bacteria.</em><em></em></pre><pre><em>Purpose : T</em><em>his study aims to determine the antibacterial power of Stolephorus insularis extract on the growth of Staphylococcus aereus bacteria by using 3 concentrations of 18%, 24% and 30%.</em></pre><pre><em>Material and Method :</em><em>This resesarch use culture of Staphylococcus aereus bacteria in MH blood agar, Stolephorus insularis extract with various concentrations (18%, 24%, 30%), 7% Na CMC, 1% DMSO solution, agar BHI media. Culture of Staphylococcus aereus was taken from liquid BHI media, then rubbed on the entire surface of BHI media using a sterile cotton stick. The antibacterial zone formed is measured.</em></pre><pre> </pre><pre><em>Result : B</em><em>ased on the results of the Mann-Whitney test there were significant differences in the inhibitory power of Staphylococcus aureus bacteria (p &lt;0.05) in the K + group with groups K-, P1, P2 and P3. Whereas between groups P1 with K-, group P2 with K- and P1, and group P3 with K-, P1 and P2 there were no significant differences because the significant value was greater than 0.05</em><em></em></pre><pre><em>Conclusion : T</em><em>here is no antimicrobial power at concentrations of 18%, 24%, and 30%. Quantitative research needs to be done to determine the decrease in the number of bacterial colonies.</em><em></em></pre><p><em><br /></em></p><p><em><strong>Keywords :</strong> Inhibition effect, Stolephorus insularis, Staphylococcus aereus</em></p><p><em><br /></em></p><p><em><strong>Correspondence :</strong> </em><em>Ayulistya Paramita, Paediatric Departemen. FKG UHT, Jl Arief Rahman Hakim no 150 Surabaya. email : [email protected]</em></p>

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