scholarly journals Comparison of the Different Techniques to Remove Fractured Endodontic Instruments from Root Canal Systems

2009 ◽  
Vol 03 (02) ◽  
pp. 90-95 ◽  
Author(s):  
Nimet Gencoglu ◽  
Dilek Helvacioglu
Keyword(s):  
Success Rate ◽  
Conventional Method ◽  
Successful Treatment ◽  
Root Canal ◽  
Operating Microscope ◽  
Removal Method ◽  
Effective Removal ◽  
Canal Systems ◽  
Conventional Methods ◽  
Different Levels

ABSTRACTObjectives: To evaluate the success of certain methods that can be used in the removal of separated instruments from different levels in curved and straight canals.Methods: Instrument removal attempts were undertaken on 63 straight and 30 curved canals containing a pre-fractured instrument using the ultrasonics under the visualization of an operating microscope or conventional methods. In straight canals, a Masseran Kit was additionally used to these techniques. The success of instrument removal in relation to the techniques used and the location of the fragments in the root canal were evaluated. Successful treatment was defined by the removal or complete by passing of the fragments.Results: The overall success rate was found 93.3% with ultrasonics and 66.6% when only conventional methodswere used in curved canals. In straight canals, also the success rate was the highest with ultrasonics (95.2%). This was followed by conventional method (80.9%) and the least by Masserann Kit (47.6%). When the success rate was investigated according to the location of the broken instruments, the lowest rate was found in the apical third of root canal.Conclusions: Location of the fragment and the shape of the root canal influence the success of fractured instrument management. Ultrasonics under the visualization of an operating microscope was found to be an effective removal method. (Eur J Dent 2009;3:90-95)

An Alternative to High-Temperature and Acid/Solvent-Based Methods for Removing Integrated Circuits from Ceramic or Other Problem Substrates

2005 ◽  
Author(s):  
Carl M. Nail
Keyword(s):  
High Temperature ◽  
Integrated Circuits ◽  
Success Rate ◽  
Mechanical Damage ◽  
Test Equipment ◽  
High Success Rate ◽  
Automated Test Equipment ◽  
Removal Method ◽  
Automated Test ◽  
Conventional Methods

Abstract Dice must often be removed from their packages and reassembled into more suitable packages for them to be tested in automated test equipment (ATE). Removing bare dice from their substrates using conventional methods poses risks for chemical, thermal, and/or mechanical damage. A new removal method is offered using metallography-based and parallel polishing-based techniques to remove the substrate while exposing the die to minimized risk for damage. This method has been tested and found to have a high success rate once the techniques are learned.

scholarly journals Selectable Implant Removal Methods due to Mechanical and Biological Failures

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Jong-Bin Lee
Keyword(s):  
Success Rate ◽  
Dental Implant ◽  
Conventional Method ◽  
Implant Removal ◽  
Pivotal Role ◽  
Removal Method ◽  
Surgical Method ◽  
Advantages And Disadvantages ◽  
Implant Complications ◽  
Missing Tooth

Dental implant has been restoring the function and esthetics lost from missing tooth. However, biomechanical implant complications are the major cause of failing implants. Therefore, implant removal is one of the indispensable dental treatments. The 70-year-old male and 66-year-old female who had discomfort on posterior implants region came to Department of Periodontology. Conventional method using trephine bur and the new, nontraumatic method using a fixture removal kit were used for implant removal, respectively. Two different methods are commonly used for implant removal. Each has advantages and disadvantages; thus, the applied surgical method must consider a patient’s intraoral condition, posttreatment plan, and the level of surgeon’s skill and experience. In conclusion, strategically executing the most optimal implant removal method plays a pivotal role in maximizing the success rate of implant reinstallation that follows afterwards.

ENDODONTIC MANAGEMENT OF SIX CANALS IN MANDIBULAR FIRST MOLAR : A CASE REPORT.

2021 ◽  
pp. 10-12
Author(s):  
Monika Rawat ◽  
Kamlendra K Roy ◽  
Anika Mittal ◽  
Aditi Dhaundiyal ◽  
Beenish Parvez ◽  
...  
Keyword(s):  
Case Report ◽  
Case Studies ◽  
Root Canal ◽  
Endodontic Treatment ◽  
Operating Microscope ◽  
Pulp Chamber ◽  
Numerous Case ◽  
Canal Systems ◽  
Uncommon Case ◽  
Mandibular First Molar

This case report presented here shows the endodontic treatment of an uncommon case of mandibular rst molar with six canals . Even though such a nding is clinically uncommon but numerous case studies have been reported. Therefore, a thorough knowledge of the anatomy of root canal systems, the variations, correct assessment of the pulp chamber oor, use of operating microscope, taking proper radiographs plays a major role in management of such cases.

scholarly journals Middle Mesial and Middle Distal Canals in Mandibular First Molar

2018 ◽  
Vol 19 (2) ◽  
pp. 233-236 ◽  
Author(s):  
Ahmad H Jabali
Keyword(s):  
Treatment Failure ◽  
Successful Treatment ◽  
Root Canal ◽  
Root Canal Treatment ◽  
Operating Microscope ◽  
Canal System ◽  
Persistent Symptoms ◽  
Patient Reported ◽  
Root Canal System ◽  
Mandibular First Molar

ABSTRACT Background Root canal anatomy is a complex entity. The main objective of root canal treatment is to get rid of the infection and have a good apical and coronal seal with an appropriate filling. Inability to achieve thorough cleaning and shaping followed by three-dimensional obturation of the root canal system usually causes root canal treatment failure. For this reason, clinicians should be aware of these anatomical variations to achieve successful treatment. Aim The aim of this article is to report on the successful treatment and follow-up of mandibular first molar with additional middle mesial (MM) and middle distal (MD) canals. Case report A 29-year-old white male patient reported with a complaint of pain in relation with tooth #19. On clinical examination, diagnosis of symptomatic irreversible pulpitis with symptomatic apical periodontitis and condensing osteitis was made and nonsurgical root canal treatment was planned. Initially, two mesial and two distal canals were located, and the patient was planned for the obturation in the second visit. The complaint of mild persistent symptoms gave a possibility of additional canals. Under the dental operating microscope and selective troughing on the floor of the pulp chamber with ultrasonic tips, additional canals were located as MM and MD canals. Conclusion Leaving some area of the root canal system untreated is found to be one of the main reasons for root canal treatment failure. Dentists should take advantage of new tools, such as dental operating microscope and ultrasonic tips to be able to locate and treat the hidden and unusual anatomy. Clinical significance Mandibular first molar with six canals is very rare to encounter. Clinician should have a thorough knowledge of these unusual anatomy to avoid treatment failure due to incomplete disinfection of the root canal system. Keywords Additional canals, Mandibular first molar, Middle distal, Middle mesial, Root canal morphology. How to cite this article Jabali AH. Middle Mesial and Middle Distal Canals in Mandibular First Molar. J Contemp Dent Pract 2018;19(2):233-236.

scholarly journals An in vivo Study of Variations in the Canal Anatomy of Maxillary and Mandibular First Molar using Surgical Operating Microscope

2013 ◽  
Vol 4 (1) ◽  
pp. 47-55
Author(s):  
Sayed Abrar Bashir Ahmed ◽  
Mansing Ganpati Pawar
Keyword(s):  
Root Canal ◽  
In Vivo Study ◽  
Operating Microscope ◽  
Canal Systems ◽  
Molar Teeth ◽  
Root Canal Morphology ◽  
Mandibular First Molar ◽  
Canal Morphology

ABSTRACT Introduction The success of endodontic therapy depends upon the ability of the clinician to locate, clean, shape and completely obturate all the root canal systems present in a tooth. In the recent times number of additional canals vs traditional canals has been very striking and pointing toward a greater degree of variation in the root canal morphology which needs to studied, understood and born in mind during practice so as to enhance the success. Introduction of surgical operating microscope is a major breakthrough in enhancement of vision in endodontics which not only gives required magnification but also coaxial illumination and video output. These facilities should be of a great help in location of small otherwise difficult to locate accessory canals. Materials and methods This in vivo study was planned to study variations in the canal anatomy of maxillary and mandibular first molar using surgical operating microscope using 200 first molar teeth, 100 maxillary and 100 mandibular groups, each group to be divided into 50 males and 50 female subgroups. After access opening chambers were cleaned, dried and observed and imaged under the microscope. Results The observations were recorded and incidences of variations in anatomy were analyzed subjecting the same to SPSS version 16.0. Conclusion It was observed that surgical operating microscope enhances clinician's ability to locate additional canals in the teeth. How to cite this article Abrar BAS, Pawar MG. An in vivo Study of Variations in the Canal Anatomy of Maxillary and Mandibular First Molar using Surgical Operating Microscope. World J Dent 2013;4(1):47-55.

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 Safety and Efficacy of All-In-One Percutaneous Pedicle Screw System

2021 ◽  
pp. 219256822110114
Author(s):  
Atsushi Kojima ◽  
Takato Aihara ◽  
Makoto Urushibara ◽  
Kenji Hatakeyama ◽  
Tomonori Sodeyama
Keyword(s):  
Pedicle Screw ◽  
Conventional Method ◽  
Surgical Time ◽  
Computed Tomography Images ◽  
Spine Stabilization ◽  
Percutaneous Pedicle Screw ◽  
Minimally Invasive Spine ◽  
Conventional Methods ◽  
Speed And Accuracy ◽  
Minimally Invasive Spine Stabilization

Study Design: Retrospective study of the prospectively collected outcomes data. Objective: The indications for PPS placement during minimally invasive spine stabilization (MISt) procedures have increased in recent years. To the best of our knowledge, no studies have documented the outcomes of PPS insertion using the all-in-one PPS system. This study compared the conventional methods and the use of all-in-one percutaneous pedicle screw (PPS) system with respect to the speed and accuracy of PPS placement. We also determined the advantages associated with the use of the all-in-one PPS system. Methods: We evaluated 54 patients who underwent PPS insertion using the conventional method and the all-in-one PPS system during MISt procedures. We also assessed the number of implanted PPSs, the time taken to implant PPSs, and the accuracy of PPS placement based on postoperative computed tomography images. Results: A total of 254 PPSs were inserted (126 using the conventional method and 128 using the all-in-one PPS system). The PPS insertion time with the all-in-one PPS system (mean, 25.3 ± 9.1 s) was significantly shorter than that using the conventional method (mean, 63.1 ± 13.0 s; P < 0.01). With respect to the accuracy of PPS insertion, ≥ 2 mm pedicle breach was noted in one case each in both groups. Conclusions: PPS placement using the all-in-one PPS system is as safe as conventional methods and has the potential to save the surgical time of MISt procedures.

Knowledge Graph Completion to Solve University Campus Issues

2020 ◽  
Vol 1 (3) ◽  
pp. 333-350
Author(s):  
Yuto Tsukagoshi ◽  
Takahiro Kawamura ◽  
Yuichi Sei ◽  
Yasuyuki Tahara ◽  
Akihiko Ohsuga
Keyword(s):  
Data Integration ◽  
Conventional Method ◽  
Current Literature ◽  
Statistical Data ◽  
Mean Absolute Error ◽  
Absolute Error ◽  
Knowledge Graph ◽  
University Campus ◽  
Combining Data ◽  
Conventional Methods

A number of urban challenges are encountered by modern societies. Governments, businesses and public bodies need to make statistical data widely available in order to tackle these challenges. Nonetheless, current literature and data are problematic; they have inaccuracies which lead to less effective methods of resolving these issues. This research aims to solve this challenge by thinking of a university campus as a microcosm of society, implementing a data integration schema, and combining data into a knowledge graph. Existing completion methods will then be applied and updated. Especially in regards to bicycle environment, our knowledge graph was tailored and evaluated in line with conventional methods, and secondly with our proposed derivative methods. Roughly 650 pieces of parking data, with various dates and times, was contrasted with each time's mean absolute error. Our approach accurately projected 54.5 more bicycles than the conventional method.

High Success Rate of Prehospital and En Route Cricothyroidotomy Performed in the Israel Defense Forces: 20 Years of Experience

2021 ◽  
pp. 1-6
Author(s):  
Eran Beit Ner ◽  
Avishai M. Tsur ◽  
Roy Nadler ◽  
Elon Glassberg ◽  
Avi Benov ◽  
...  
Keyword(s):  
Success Rate ◽  
Body Part ◽  
Salvage Procedure ◽  
Care Providers ◽  
Success Rates ◽  
Exact Test ◽  
Medical Teams ◽  
Israel Defense Forces ◽  
Different Levels ◽  
Overall Mortality

Abstract Introduction: Securing the airway is a crucial stage of trauma care. Cricothyroidotomy (CRIC) is often addressed as a salvage procedure in complicated cases or following a failed endotracheal intubation (ETI). Nevertheless, it is a very important skill in prehospital settings, such as on the battlefield. Hypothesis/Problem: This study aimed to review the Israel Defense Forces (IDF) experience with CRIC over the past two decades. Methods: The IDF Trauma Registry (IDF-TR) holds data on all trauma casualties (civilian and military) cared for by military medical teams since 1997. Data of all casualties treated by IDF from 1998 through 2018 were extracted and analyzed to identify all patients who underwent CRIC procedures. Variables describing the incident scenario, patient’s characteristics, injury pattern, treatment, and outcome were extracted. The success rate of the procedure was described, and selected variables were further analyzed and compared using the Fisher’s-exact test to identify their effect on the success and failure rates. Odds Ratio (OR) was further calculated for the effect of different body part involvement on success and for the mortality after failed ETI. Results: One hundred fifty-three casualties on which a CRIC attempt was made were identified from the IDF-TR records. The overall success rate of CRIC was reported at 88%. In patients who underwent one or two attempts, the success rate was 86%. No difference was found across providers (physician versus paramedic). The CRIC success rates for casualties with and without head trauma were 80% and 92%, respectively (P = .06). Overall mortality was 33%. Conclusions: This study shows that CRIC is of merit in airway management as it has shown to have consistently high success rates throughout different levels of training, injuries, and previous attempts with ETI. Care providers should be encouraged to retain and develop this skill as part of their tool box.

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