GUIDED ENDODONTIC ACCESS

2021 ◽  
pp. 65-66
Author(s):  
Manuja Nair ◽  
A Devadathan
Keyword(s):  
Fracture Resistance ◽  
Structural Integrity ◽  
Conventional Technique ◽  
Minimal Invasive ◽  
Dental Practice ◽  
Operating Microscope ◽  
The Future ◽  
Endodontically Treated Tooth ◽  
Occlusal Load

We have come a long way in dentistry from “extension for prevention” to “prevention of extension”. Asimilar approach in endodontics is going to change the future of dental practice with Minimal Invasive Endodontics (MIE). MIE mainly includes preservation of structural integrity of tooth, alternate access cavity designs, guided endodontic access, modern burs, cleaning and shaping, 3D irrigation and disinfection, magnication aids like loupes and dental operating microscope. Survival of an endodontically treated tooth depends mainly on its remaining structural integrity after access preparation. The concept of Conservative endodontic cavities (CEC) was introduced to preserve the pericervical dentin (PCD), which is crucial to transfer the occlusal load to the root. In traditional endodontic cavities (TEC) much of PCD is lost which reduces the fracture resistance of tooth. Guided endodontic access was introduced as an attempt to preserve the PCD. It ensures predictable outcome without any procedural errors. The present paper attempts to narratively summarize the scope of Guided endodontic access in dental practice and explain its benets to the practitioners compared with conventional technique

scholarly journals Minimal Invasive Post Endodontic Monoblock Restorations, II- Sharonlay Crown: Review

2021 ◽  
Vol 6 (3) ◽  
Author(s):  
Nagy Abdulsamee
Keyword(s):  
Fracture Resistance ◽  
Structural Integrity ◽  
Minimal Invasive ◽  
Cervical Region ◽  
Shear Forces ◽  
Cavity Preparation ◽  
Horizontal Fracture ◽  
Tooth Structure ◽  
Post And Core ◽  
The Common

The loss of tooth structure owing to caries, iatrogenic cavity preparation, and dentin drying compromises the structural integrity of root canal treated teeth. Because the quantity of remaining tooth structure and the ability to resist occlusal forces have a direct link, it is critical to offer a post endodontic restoration that allows cuspal covering as soon as possible after completion. The decision to place a full crown or an onlay is based on the remaining tooth structure; an onlay can be inserted if the cuspal width to length ratio is 1:2 or above. A full crown must be planned when the ratio is less than 1:2. Cast post and core or a prefabricated post can provide fracture resistance with equivalent outcomes in single-rooted teeth requiring post-endodontic repair. In the case of premolars, however, contrary to the common practice of just providing cuspal covering through onlays, cervical reinforcement would be required to counteract horizontal stresses acting in the cervical region. Only full crown or onlay does not prevent horizontal fracture of tooth that occurs due to shear forces of mastication so many a times radicular support is taken to retain coronal restoration and strengthening of cervical region of tooth. Sharonlay is one of the newer ways being developed by researchers to improve the function of teeth and repair in such circumstances. Sharonlay is a new onlay patented design with I.P. no 1956475 dated 27/04/2010 that has a post extending into the radicular section of the premolar giving the required strengthening in a conservative manner while also protecting it against both vertical and horizontal stresses. It is a potential post-endodontic restoration option for premolars, and it may be indicated in a multirooted tooth primarily for retention, particularly when the clinical crown is too short to support an onlay, crown, or endocrown.

Managing Structural Integrity of Offshore Platforms: Looking Back to Drive the Future

2013 ◽  
Author(s):  
Roberto Piva ◽  
Margherita Latronico ◽  
Andrea Nero ◽  
Stefano Sartirana
Keyword(s):  
Structural Integrity ◽  
Offshore Platforms ◽  
The Future ◽  
Looking Back

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.

scholarly journals Inclusion of Warm Pre-Stress Concept in French RPV Structural Integrity Assessment

2016 ◽  
Author(s):  
Dominique Moinereau ◽  
Malik Ait-Bachir ◽  
Stéphane Chapuliot ◽  
Stéphane Marie ◽  
Clémentine Jacquemoud ◽  
...  
Keyword(s):  
Brittle Fracture ◽  
Fracture Resistance ◽  
Large Scale ◽  
Structural Integrity ◽  
Stress Effect ◽  
Local Approach ◽  
Experimental Database ◽  
Term Operation ◽  
Integrity Assessment ◽  
Brittle Fracture Resistance

Evaluation of the fracture resistance of nuclear reactor pressure vessel (RPV) regarding the risk of brittle fracture is a key point in the structural integrity assessment of the component (RPV). Such approach is codified in French RSE-M code, based on a very conservative methodology. With respect to long term operation, an improvement of the present methodology is necessary and in progress to reduce this conservatism. One possible significant improvement is the inclusion of the warm pre-stress (WPS) concept in the assessment. After a short description of the WPS concept, the process engaged in France to allow inclusion of WPS in the integrity assessment is presented. In a first step, experimental and numerical studies have been conducted in France by EDF, CEA and AREVA (also including international collaborations and projects) to demonstrate and validate the beneficial effect of WPS on the brittle fracture resistance of RPV steels. A large panel of experimental results and data is now available obtained on small, medium and large scale specimens on representative RPV steels (including highly irradiated RPV materials). These data have been included in a specific WPS experimental database. Main experiments have been interpreted by refined computations, based on elastic plastic analyses and local approach to cleavage fracture. In a second step, a new criterion (ACE criterion) has been proposed by French organizations (AREVA, CEA and EDF) for an easy simplified evaluation of warm pre-stress effect on the brittle fracture resistance of RPV steels. Accuracy and conservatism of the criterion is verified by comparison to experimental data results and numerical analyses. Finally, implementation of the WPS effect in the French RSE-M code (for in service assessment) is in progress, based on the ACE criterion. The present paper summarizes all these steps leading to codification of WPS in RSE-M code.

scholarly journals Facing the future: the FGDP(UK) facial aesthetics masterclass

2009 ◽  
Vol 91 (3) ◽  
pp. 107-107
Author(s):  
Melanie Hook
Keyword(s):  
Dental Practice ◽  
Facial Aesthetics ◽  
General Dental Practice ◽  
The Future ◽  
The Uk

The Faculty of General Dental Practice UK (FGDP(UK)) is proud to announce its innovative facial aesthetics masterclass, due to be launched in July 2009. It is the only facial aesthetics course for dentists in the UK that combines instruction in the performance of practical procedures with dissection exercises on fresh, unembalmed cadaver heads (see also article on page 80).

scholarly journals Effect of two formulations of 10% sodium ascorbate on fracture resistance of endodontically treated tooth submitted to dental bleaching with hydrogen peroxide associated titanium dioxide nanoparticles

2014 ◽  
Vol 2 (1) ◽  
pp. 13
Author(s):  
Francisco Carlos Bontorim ◽  
Milton Carlos Kuga ◽  
Sabrina Spinelli Cioffi ◽  
Marcus Vinicius Reis Só ◽  
Gisele Faria ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Titanium Dioxide ◽  
Fracture Resistance ◽  
Composite Resin ◽  
Positive Control ◽  
Sodium Ascorbate ◽  
Resistance Testing ◽  
Dental Bleaching ◽  
Endodontically Treated Tooth

PURPOSE: This study evaluated the effect of 10% sodium ascorbate (10SA), in gel (10SAg) or aqueous solution (10SAs) formulations, on fracture resistance of endodontically treated tooth submitted to dental bleaching procedures with 15% hydrogen peroxide associated with titanium dioxide (15HP-TiO2) nanoparticles and photoactivated by LED-laser. MATERIAL AND METHODS: Forty maxillary premolars were endodontically-treated and embedded in acrylic resin up to the cement-enamel junction. The specimens were divided into four groups (n=10): G1 (negative control): no bleaching, coronal access restored with composite resin; G2 (positive control): three dental bleaching  sessions using 15HP-TiO2 and LED-laser photoactivation and restored with composite resin (positive control); G3 (10SAg): similar procedures to G2, but applied  10SA, in gel formulation, for 24 hours before restoration; G4 (10SAs): similar procedures to G3, but applied  10SA, in aqueous solution formulation.  The 15HP-TiO2 was applied on buccal and lingual surfaces of the crown tooth and inside the pulp chamber and photoactivated by LED-laser. Between each bleaching session, the teeth were maintained in artificial saliva, at 37oC, for 7 days. In sequence, the teeth were submitted to fracture resistance testing using an eletromechanical machine test. The data was analyzed using Kruskal Wallis test (p = 0.05) RESULTS: There are no differences significant among the groups in relation to fracture resistance of endodontically treated teeth (p>0.05). CONCLUSIONS: The use of 10% sodium ascorbate, in gel or aqueous solution formulations, did not interfered on the fracture resistance teeth after dental bleaching using 15HP-TiO2 and LED-laser photoactivation.

What is the dental practice model of the future?

2020 ◽  
Vol 84 (4) ◽  
pp. 502-504
Author(s):  
Jeanne C. Sinkford
Keyword(s):  
Dental Practice ◽  
Practice Model ◽  
The Future
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