Change In Working Length At Different Stages Of Instrumentation As A Function Of Canal Curvature,
2018
Virginia Commonwealth University
Change In Working Length At Different Stages Of Instrumentation As A Function Of Canal Curvature, Mei Tang
Theses and Dissertations
The aim of this study was to determine the change in working length (∆WL) before and after coronal flaring and after complete rotary instrumentation as a function of canal curvature. One mesiobuccal or mesiolingual canal from each of 43 extracted molars had coronal standardization and access performed. Once the access was completed, canal preparation was accomplished using Gates Glidden drills for coronal flaring and EndoSequence files for rotary instrumentation. WLs were obtained at 3 time points: pre-instrumentation (unflared), mid-instrumentation (flared) and post-instrumentation (concluded). Measurements were made via direct visualization (DV) and the CanalPro apex locator (EM) in triplicate by a …
The Effect Of Instrumentation Taper On Dentin Conservation,
2018
Virginia Commonwealth University
The Effect Of Instrumentation Taper On Dentin Conservation, Megan E. Green
Theses and Dissertations
Introduction: The aim of this in vitro study was two part. The first being to assess and compare the amount of dentin removed by an instrument with a taper of 0.04 versus an instrument with a taper of 0.06 using the Edge Evolve® file system at different increments within the canal system. Secondly, this study evaluated whether instrumentation with either taper resulted in a remaining dentin thickness (RDT) of less than 0.3mm. If this RDT was imposed upon, fracture resistance was compromised. Both pre and post instrumentation measurements were taken of samples instrumented with the 0.04 and 0.06 tapered files. …
The Efficacy Of Copper Iodide Nanoparticle-Augmented Mta Against Enterococcus Faecalis: A Confocal Microscopy Study,
2018
Medical University of South Carolina
The Efficacy Of Copper Iodide Nanoparticle-Augmented Mta Against Enterococcus Faecalis: A Confocal Microscopy Study, Craig Alan Atchison
MUSC Theses and Dissertations
Introduction: The introduction of metallic nanoparticles such as copper into medical materials has shown promising results in terms of antimicrobial activity. A novel material incorporating nanoparticles could be useful in combating bacterial biofilms and improving long-term success rates in endodontic therapies. The aim of this study was to evaluate the antibacterial effect of mineral trioxide aggregate disks augmented with copper iodide nanoparticles on a biofilm of E. faecalis and compare the results with non-augmented control MTA in the same conditions using confocal laser scanning microscopy. Methods: Fabricated disks were made up of control, non-augmented MTA or copper iodide nanoparticle-augmented MTA …
Observations Of Trends And Successes Of Revascularization Therapy At Virginia Commonwealth University: A Retrospective Study,
2018
Virginia Commonwealth University
Observations Of Trends And Successes Of Revascularization Therapy At Virginia Commonwealth University: A Retrospective Study, Richard W. Sedwick
Theses and Dissertations
The aim of this study was to determine the trends in protocol, success rates, and consistency in follow up of revascularization procedures in a controlled environment. Patients of the Virginia Commonwealth University School of Dentistry were identified who were offered revascularization therapy as a treatment option on immature permanent teeth from January 1, 2010 to May 31, 2017. A total of 77 patients and 78 teeth were evaluated for revascularization therapy. For patients accepting treatment, records were reviewed for outcome assessment and consistency of follow up. A total of 30 patients (31 teeth) were treated following revascularization protocols, with only …
Effects Of Blood Contamination On Chemical Composition And Ion Releasing Of Calcium Silicate-Based Materials,
2018
Faculty of Dentistry
Effects Of Blood Contamination On Chemical Composition And Ion Releasing Of Calcium Silicate-Based Materials, Nareerat Thanavibu
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study assessed the effects of blood contamination on the chemical composition and ion release of calcium silicate-based materials. ProRoot MTA (WMTA), Biodentine and TotalFill BC RRM putty (TRRM) were investigated. Materials were exposed to blood (blood-contaminated condition) or normal saline (non-blood-contaminated condition) for 24 hours. Three samples of each group were analysed for chemical composition using X-ray diffractometer and an energy-dispersive X-ray spectoscope with a scanning electron microscope after immersed in phosphate-buffered saline for 1, 7, 14 and 28 days. Five samples of each group were used to measure pH and ion release using a pH meter and inductively …
Effectiveness Of Different Root Canal Disinfection Protocols On The Reduction Of Bacteria In Large Root Canals,
2018
Faculty of Dentistry
Effectiveness Of Different Root Canal Disinfection Protocols On The Reduction Of Bacteria In Large Root Canals, Parnwad Sasanakul
Chulalongkorn University Theses and Dissertations (Chula ETD)
Introduction: The aims of this study were to evaluate the effectiveness of disinfection methods and determine the most promising irrigation protocol for regenerative endodontics in teeth with large root canals. Methods: Sterilized root samples with 0.8-mm wide apical foramen (n=94) were prepared from human mandibular premolars. Ninety-two samples were infected with E. faecalis for 21 days and biofilm formation was verified using scanning electron microscopy (n=2). The 90 infected samples were randomly assigned into 9 groups: no intervention (initial), 1.5% NaOCl irrigation (1.5N), 2.5% NaOCl irrigation (2.5N), 1.5N + intermittent passive ultrasonic irrigation (PUI), 1.5N + intermittent canal brushing with …
Clinical Cases In Endodontics; Chapter 1: Introduction,
2017
The University of New England
Clinical Cases In Endodontics; Chapter 1: Introduction, Takashi Komabayashi
Dental Medicine Faculty Publications
Chapter 1 of Clinical Cases in Endodontics, a problem-based text that presents a wide range of real cases in endodontics. Clinical Cases in Endodontics presents actual clinical cases, accompanied by academic commentary, that question and educate the reader about essential topics in endodontic therapy. It begins with sets of cases illustrating the most common diagnoses and the steps involved in preparing a treatment plan. Subsequent chapters continue in this style, presenting exemplary cases as the basis of discussing various treatment options, including nonsurgical root canal treatment, re-treatment, periapical surgery, internal and external resorption, emergencies and trauma, and treating incompletely developed …
Viability Of Human Periodontal Ligament Fibroblasts After Time In Tooth Storage Media,
2017
Marquette University
Viability Of Human Periodontal Ligament Fibroblasts After Time In Tooth Storage Media, Scott Macdonald
Master's Theses (2009 -)
Periodontal ligament cell viability at the time of tooth replantation is of utmost importance for proper repair of the damaged tissues (1). Multiple different options are currently available for storage of an avulsed tooth. The goal of this study was to investigate new storage media and evaluate their ability to maintain cell viability over time. Materials and Methods: Cultured human periodontal ligament fibroblasts (hPDLF) were seeded on 96-well plates. These cells were exposed to different storage media including: Hank’s Balanced Salt Solution (HBSS), EMT Toothsaver (EMT), Save-A-Tooth (SAT), trehalose (T300), cell culture media, water, and different formulations of HBSS combined …
Survival Rates Of Primary Endodontic Therapy Following Core/Post And Crown Placement,
2017
Marquette University
Survival Rates Of Primary Endodontic Therapy Following Core/Post And Crown Placement, Kandace Yee
Master's Theses (2009 -)
Introduction: The objective of this study was to determine if a correlation exists between the time to core or post and core (core/post) placement following non-surgical root canal therapy (NS RCT), the time to crown placement following core/post placement, and the incidence of an untoward event. Materials and Methods: Utilizing the Delta Dental of Wisconsin Insurance Database, information was analyzed from 476,479 initial NS RCT procedures. Of these teeth, 160,040 had a core/post and a crown placed before the end of the continuous coverage period or occurrence of an untoward event. Untoward events were defined as having a retreatment, apicoectomy, …
Qmix 2in1 And Naoci Precipitate: Documentation, Identification, And Exothermic Reaction,
2017
Marquette University
Qmix 2in1 And Naoci Precipitate: Documentation, Identification, And Exothermic Reaction, Gordon L. Barkley Iii
Master's Theses (2009 -)
Introduction: The aim of this study was to document and identify precipitate formation and exothermic reaction caused when mixing NaOCl and QMiX. Methods: Photography captured time-dependent changes when mixing NaOCl and QMiX at; 0 seconds, 30 seconds, 1 minute, 30 minutes, 1 hour, and 24 hours. A differential scanning calorimeter (DSC) was utilized in determination of heat flow while analyzing temperature change (°C), enthalpy (mJ), and time (seconds) for NaOCl with QMiX and NaOCl with 2% chlorhexidine (CHX). 1H Nuclear Magnetic Resonance (NMR) and 2D NMR (DOSY) spectroscopy analyzed precipitation formed from NaOCl and QMiX. Results: Digital photography documented immediate, …
Prevalence And Clinical Characteristics Of Teeth Extracted With A Diagnosis Of Cracked Tooth: A Retrospective Study,
2017
Virginia Commonwealth University
Prevalence And Clinical Characteristics Of Teeth Extracted With A Diagnosis Of Cracked Tooth: A Retrospective Study, Riley B. Sturgill
Theses and Dissertations
The body of knowledge that exists regarding cracked teeth is limited. The purpose of this study was to determine the prevalence of cracks among extracted teeth. This retrospective longitudinal cohort study included patients of the Virginia Commonwealth University School of Dentistry that underwent extraction procedures over a 6 year period. The sample consisted of 20,408 patients and 40,870 teeth. Statistical analysis software was used to identify diagnoses of a crack, fracture, or split tooth prior to extraction of the tooth by analyzing the Electronic Health Record (EHR) (axiUm™, Version 6.03.03.1035, Exan Corporation, Vancouver, BC, Canada). There were 3,228 teeth …
A Comparative Study Of Intraradicular Enterococcus Faecalis Biofilm Removal With Three Root Canal Treatment Systems: A Scanning Electron Microscopy Evaluation,
2017
Virginia Commonwealth University
A Comparative Study Of Intraradicular Enterococcus Faecalis Biofilm Removal With Three Root Canal Treatment Systems: A Scanning Electron Microscopy Evaluation, Cyrous Ardalan
Theses and Dissertations
The objective of this study was to evaluate the biofilm removal efficacy of three root canal treatment systems: ProUltra® PiezoFlow™, traditional needle irrigation, and the GentleWave® system in an ex-vivo benchtop study. Twenty-four extracted maxillary and mandibular molars were selected. Teeth were all instrumented to a master apical file size #25 with 4% taper. Teeth were then randomly divided into four experimental groups and two control groups. The root canals were inoculated with a culture of Enterococcus faecalis and incubated for five weeks to form a biofilm. Each group was then treated with one of the different root canal treatment …
Evaluation Of Volumetric Change Of Periapical Lesions After Apicoectomy As A Measure Of Postsurgical Healing Utilizing Cone Beam Computed Tomography,
2017
Virginia Commonwealth University
Evaluation Of Volumetric Change Of Periapical Lesions After Apicoectomy As A Measure Of Postsurgical Healing Utilizing Cone Beam Computed Tomography, Eshwar Arasu
Theses and Dissertations
The aim of this study was to evaluate whether volumetric changes in persistent periapical lesions can be detected in follow-ups six months to five years after apicoectomy using cone-beam computed tomography. Patients with a previous treatment history of apicoectomy and for whom a pre-surgical CBCT scan was taken between November 2010 and December 2015 were invited to participate in the study. A post-surgical CBCT image of the treated tooth was obtained at the recall visit. Volumetric and linear measurements of periapical lesions on initial and postoperative CBCT images were performed using DiThreshGUI software and two calibrated examiners—a board-certified endodontist and …
The Prevalence, Predictive Factors, And Classification Of Intrapulpal Cracks In Maxillary Molars Requiring Endodontic Treatment,
2017
Virginia Commonwealth University
The Prevalence, Predictive Factors, And Classification Of Intrapulpal Cracks In Maxillary Molars Requiring Endodontic Treatment, Husain Karashi
Theses and Dissertations
Diagnosis and treatment of teeth with longitudinal fractures is challenging. Cracks are usually not visible radiographically; they require a thorough evaluation to aid in diagnosis. Patients may be asymptomatic, demanding the dentist rely on clinical findings to make a diagnosis. Early diagnosis of the presence and extent of a crack is essential for the successful management of a cracked tooth. There is limited information in the literature regarding the prevalence or predictive factors of cracks extending into the pulp chamber of teeth. The purpose of this study was to determine the prevalence of intrapulpal cracks in maxillary molars and to …
A Study Of The Relationship Between Job Related Stress And Temporomandibular Disorders In Accountants Working In Jakarta,
2016
Undergraduate Program, Faculty of Dentistry, Universitas Indonesia, Jakarta 10430, Indonesia
A Study Of The Relationship Between Job Related Stress And Temporomandibular Disorders In Accountants Working In Jakarta, Cindy Maura Saputra, Laura Susanti Himawan, Ira Tanti
Journal of Dentistry Indonesia
Stress is a known risk factor for Temporomandibular Disorders (TMD), however there are few studies of TMD in people who work in high stress jobs. Accounting is a profession known for its high levels of stress and expectation. Objective: The aim of this study is to investigate the relationship between the intensity and frequency of job related stress and the occurrence of TMD in accountants in Jakarta. Methods: A cross-sectional study, with ethics approval from the Ethical Committee of the Faculty of Dentistry, University Indonesia, was performed on 116 accountants aged 21 to 50, living in Jakarta. Subjects were asked …
Torsion And Bending Properties Of Edgeendo Files,
2016
Marquette University
Torsion And Bending Properties Of Edgeendo Files, Chad Hansen
Master's Theses (2009 -)
Introduction: One important step of root canal therapy is the process of cleaning and shaping each canal. This process involves using endodontic rotary files combined with chemical irrigants to remove pulpal remnants and infected dentin from the canal while eliminating pathogenic bacteria. It is essential to maintain proper canal anatomy while cleaning and shaping. The challenge for the practitioner is to select a rotary file system that will be flexible enough to maintain canal anatomy but strong enough to prevent breakage under normal use. File flexibility allows for better maintenance of canal anatomy. A file’s resistance to torsional fatigue reduces …
Outcomes Of Primary Endodontic Therapy Provided By Endodontic Specialists Compared To Other Providers,
2016
Marquette University
Outcomes Of Primary Endodontic Therapy Provided By Endodontic Specialists Compared To Other Providers, Jacob Burry
Master's Theses (2009 -)
Introduction: The objective of this study was to compare the outcomes of initial non-surgical root canal therapy (NSRCT) for different tooth types provided by both endodontists and other providers. Methods: Using an insurance company database, 487,476 initial NSRCT procedures were followed from the time of treatment to the presence of an untoward event indicated by Current Dental Terminology (CDT) codes for retreatment, apical surgery, or extraction. Population demographics were computed for provider type and tooth location. Kaplan-Meier survival estimates were calculated for 1, 5, and 10 years. Hazard ratios for provider type and tooth location were calculated using the Cox …
Viability Of Human Periodontal Ligament Fibroblasts After Storage In Save-A-Tooth, Emt Toothsaver And Hank's Balanced Salt Solution,
2016
Marquette University
Viability Of Human Periodontal Ligament Fibroblasts After Storage In Save-A-Tooth, Emt Toothsaver And Hank's Balanced Salt Solution, Wonhee Lee
Master's Theses (2009 -)
Introduction: Viability of periodontal ligament (PDL) cells is a key prognostic factor fora replanted tooth following avulsion. Dehydration results death of PDL cells, which in turn causes ankylosis upon replantation, followed by replacement resorption. Hank’s Balanced Salt Solution (HBSS) has been recommended as the standard storage medium for an avulsed tooth. Save-A-Tooth and EMT Tooth saver (Dentosafe)are commercially available tooth storage media. With the best of our knowledge no study has yet compared these media for their effective tooth storage times. The aim of this invitro study is to evaluate Save-A-Tooth, EMT Toothsaver (Dentosafe), and HBSS for their effect on …
Evaluation Of Resin Sealer Penetration Of Dentin Following Different Final Rinses For Endodontic Irrigation Using Confocal Laser Scanning Microscopy,
2016
Medical University of South Carolina
Evaluation Of Resin Sealer Penetration Of Dentin Following Different Final Rinses For Endodontic Irrigation Using Confocal Laser Scanning Microscopy, Omar Ezzaldin Abusteit
MUSC Theses and Dissertations
Introduction: The aim of the study was to directly assess the depth of sealer penetration into dentinal tubules following different final rinses and indirectly evaluate precipitation of irrigating solutions. Materials and Methods: 52 extracted maxillary incisors were prepared to size 40/04 crown down with 6% sodium hypochlorite irrigating solution. Teeth were randomly divided into 4 groups (n=13) according to the final rinse. Group 1- 17% EDTA, saline and 2% Chlorhexidine solution; Group 2- SmearOFFâ„¢; Group 3- QMix®; Group 4- control with saline. Each final rinse was 3 ml over 1 minute placed with a 30-gauge needle 3 mm short from …
Comparison Of Treatment Planning Decisions When Combining Cbct And Digital Radiography Verses Digital Radiography Alone,
2016
Virginia Commonwealth University
Comparison Of Treatment Planning Decisions When Combining Cbct And Digital Radiography Verses Digital Radiography Alone, Mckay Barlow Packer
Theses and Dissertations
Cone beam computed tomography (CBCT) is the recommended imaging modality of choice for evaluating previous endodontic treatment (1). The aim of this study was to compare treatment planning decisions made when evaluating previous endodontic treatment to determine if treatment planned and projected prognosis differs when digital radiography is used alone or in combination with CBCT. A retrospective chart review was conducted. Patients for whom a CBCT was taken were included in the study. Twenty-eight patients qualified. Patient’s periapical digital radiographs (Dexis©) were evaluated by 2 calibrated endodontists, a treatment plan was identified and a prognosis was projected. Later the same …
