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Orthodontics and Orthodontology Commons

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285 full-text articles. Page 1 of 11.

Microleakage - The Main Culprit In Bracket Bond Failure?, Ioana Roxana Bordea, Adina Sîrbu, Ondine Lucaciu, Aranka Ilea, Radu Septimiu Câmpian, Doina Adina Todea, Teodora Gabriela Alexescu, Maria Aluaș, Corina Budin, Andreea Simona Pop 2019 The University of Medicine and Pharmacy, Cluj Napoca, Romania

Microleakage - The Main Culprit In Bracket Bond Failure?, Ioana Roxana Bordea, Adina Sîrbu, Ondine Lucaciu, Aranka Ilea, Radu Septimiu Câmpian, Doina Adina Todea, Teodora Gabriela Alexescu, Maria Aluaș, Corina Budin, Andreea Simona Pop

Journal of Mind and Medical Sciences

Microleakage is the most common cause of bracket debonding. Moreover, different thermal expansion coefficients between the enamel, the adhesive, and the bracket bases will cause repeated expansion and contraction, adding more stress to the bonding strength. Debonding represents the failure of the adhesion between the brackets and the tooth enamel. The debonding of brackets from the enamel surface is the result of several factors, such as acid-etching and drying, adhesive application, and the time and type of photo activation. The under polymerization process of composite photo activation may lead to early bracket debonding. Objective. The aim of this research is ...


Following Surgically Assisted Rapid Palatal Expansion, Do Tooth-Borne Or Bone-Borne Appliances Provide More Skeletal Expansion And Dental Expansion?, Adrien Hamedi-Sangsari 2019 University of Pennsylvania

Following Surgically Assisted Rapid Palatal Expansion, Do Tooth-Borne Or Bone-Borne Appliances Provide More Skeletal Expansion And Dental Expansion?, Adrien Hamedi-Sangsari

Dental Theses

Abstract

Purpose: The aim of this study is to compare the outcome measures of skeletal and dental expansion with Bone-Borne (BB) versus Tooth-Borne (TB) appliances following SARPE. This study is being done to provide quantitative measurements that will help the oral surgeon and orthodontist in selecting the appliance with, on average, the greatest amount of skeletal expansion and the least amount of dental expansion.

Methods: A computerized database search was performed using PubMed, EBSCO, Cochrane, Scopus, Web of Science, and Google Scholar on publications in reputable oral surgery and orthodontic journals. A systematic review and meta-analysis was then completed with ...


Comparison Of Patient Factors Influencing The Selection Of An Orthodontist, General Dentist, Or Direct-To-Consumer Aligners For Orthodontic Treatment, Jeffrey C. Olson 2019 Virginia Commonwealth University

Comparison Of Patient Factors Influencing The Selection Of An Orthodontist, General Dentist, Or Direct-To-Consumer Aligners For Orthodontic Treatment, Jeffrey C. Olson

Theses and Dissertations

Purpose: To evaluate the factors that influence potential orthodontic patients choosing between an orthodontist, general dentist, and direct-to-consumer (DTC) aligners for their treatment, and to determine the demand for each provider type.

Methods: An electronic survey was administered to 250 individuals among the general population of adults in the United States. Questions were designed to determine the respondent’s level of interest in pursuing orthodontic treatment with each provider type, evaluate their current level of knowledge concerning provider options, and identify factors influencing their selection. Pearson’s chi-squared test and ANOVA were used to evaluate the factors influencing patients in ...


Let’S Face It: The Effect Of Orthognathic Surgery On Facial Recognition Algorithm Analysis, Carolyn Bradford Dragon 2019 Department of orthodontics

Let’S Face It: The Effect Of Orthognathic Surgery On Facial Recognition Algorithm Analysis, Carolyn Bradford Dragon

Theses and Dissertations

Aim: To evaluate the ability of a publicly available facial recognition application program interface (API) to calculate similarity scores for pre- and post-surgical photographs of patients undergoing orthognathic surgeries. Our primary objective was to identify which surgical procedure(s) had the greatest effect(s) on similarity score.

Methods: Standard treatment progress photographs for 25 retrospectively identified, orthodontic-orthognathic patients were analyzed using the API to calculate similarity scores between the pre- and post-surgical photographs. Photographs from two pre-surgical timepoints were compared as controls. Both relaxed and smiling photographs were included in the study to assess for the added impact of facial ...


The Efficacy Of A Fluoride-Containing Orthodontic Primer In Preventing Demineralization, Alyssa G. Ricci 2019 Virginia Commonwealth University

The Efficacy Of A Fluoride-Containing Orthodontic Primer In Preventing Demineralization, Alyssa G. Ricci

Theses and Dissertations

Purpose: To evaluate the efficacy of a fluoride-containing orthodontic primer in preventing demineralization adjacent to brackets and compare the quality of enamel on tooth surfaces that received interproximal reduction (IPR).

Methods: Patients at the VCU Orthodontic clinic who consented to orthodontic treatment involving extraction of at least 2 premolars were recruited to this pilot clinical study. Brackets were bonded to premolars using one of two primers, fluoride-containing experimental or control. IPR was also performed, and the experimental primer was applied to randomly selected teeth. Extracted teeth were analyzed visually for the presence of white spot lesions (WSLs). Micro-CT analyses were ...


Effect Of Shear Bond Strength With Novel Apc™ Flash-Free Brackets And Different Bonding Protocol: An In Vitro Study, Carl Bernstein 2019 West Virginia University

Effect Of Shear Bond Strength With Novel Apc™ Flash-Free Brackets And Different Bonding Protocol: An In Vitro Study, Carl Bernstein

Graduate Theses, Dissertations, and Problem Reports

Background and Objectives: In today’s time, there is an increasingly crowded field of competition vying over a small subset of the population. Now, more than ever it is imperative to compete with efficiency and esthetics. Each step for orthodontic bonding procedures increases the chance for error to occur. However, orthodontic bracket, etchant, sealant, and adhesive material has the ability to improve bond strength and final outcome for the patient and provider. The aim of this study was to determine effective bonding protocols for Advanced Clarity APC™ Flash-Free Brackets and to determine if adhesive remains on enamel or orthodontic bracket ...


Judged Facial Attractiveness Of Extraction And Non-Extraction Orthodontic Treatment In Repose And Smiling, Nicolette R. Chahin 2019 West Virginia University

Judged Facial Attractiveness Of Extraction And Non-Extraction Orthodontic Treatment In Repose And Smiling, Nicolette R. Chahin

Graduate Theses, Dissertations, and Problem Reports

Background and Objectives: More so than ever, the public is becoming exceedingly aware of esthetics, and will evaluate their treatment outcome based upon the improvement to their smile and overall enhancement of their facial appearance. There exists a debate in orthodontics, as to whether or not extractions harm the profile. The aim of this study was to determine if facial attractiveness is harmed in subjects having completed orthodontic treatment involving the extraction of four premolars both in repose and smiling when viewed in lateral profile. Another objective is to identify any impact upper incisor retraction has on facial attractiveness.

Experimental ...


Acquired Bracket Pellicle Modulation Via Exposure To Histatin 3, Niklas W. Neilson 2018 The University of Western Ontario

Acquired Bracket Pellicle Modulation Via Exposure To Histatin 3, Niklas W. Neilson

Electronic Thesis and Dissertation Repository

Objectives: To investigate the effect of histatin 3 on the protein pellicle formation on the orthodontic bracket surface.

Methods: Our study consisted of 4 sample groups. A sample of human parotid saliva without histatin functioned as a control group. Other groups were immersed with or without histatin 3 and human parotid saliva. Each group was incubated for 2 hours in their respective substrate at 37°C. The acquired pellicle from each group was harvested, then analyzed with SDS-PAGE and LC-ESI-MS/MS.

Results: Thirty-nine proteins were identified in the control group, 18 were identified in group 2, and 21 were identified ...


Effects Of Class Ii Correctors And Functional Appliances On The Periodontal Health Of The Mandibular Incisors – A Prospective Cone-Beam Computed Tomography (Cbct) Study, David C. Duevel 2018 University of Nebraska Medical Center

Effects Of Class Ii Correctors And Functional Appliances On The Periodontal Health Of The Mandibular Incisors – A Prospective Cone-Beam Computed Tomography (Cbct) Study, David C. Duevel

Theses & Dissertations

The purpose of this investigation was to evaluate the effects of Class II correctors and functional appliances on the dentoalveolar support of the mandibular incisors during orthodontic treatment. Twenty six patients who were treated with a ForsusTM, Herbst, or MARA participated this study. Lateral cephalometric radiographs, limited field-of-view CBCTs, and periodontal measurements were collected both the day of appliance activation and day of appliance deactivation. Ten hard tissue measurements on all four mandibular incisors were collected at each time point on CBCT images. Bone thickness increased at 6 and 9 mm apical from the cementoenamel junction (CEJ) on the ...


Changes In The Transverse Dimension Of The Nasomaxillary Complex Following Rapid Palatal Expansion – A Post-Retention, Cbct Evaluation, Allison Schubert 2018 University of Nebraska Medical Center

Changes In The Transverse Dimension Of The Nasomaxillary Complex Following Rapid Palatal Expansion – A Post-Retention, Cbct Evaluation, Allison Schubert

Theses & Dissertations

Purpose: The purpose of this investigation was to evaluate the immediate and long-term effects of palatal expansion on the transverse dimension of the nasomaxillary complex.

Materials and Methods: Twenty-eight patients’ CBCTs were obtained at four time points: pre-expansion (T1), post-expansion (T2), pre-treatment (T3), and middle or end of orthodontic treatment (T4). The patients’ age, sex, cervical vertebral maturation stage, and the number of instructed expander turns were recorded. Measurements of the nasal floor, nasal passage, maxillary sinus, maxillary first molar mesiolingual cusp, maxillary first molar palatal cusp, maxillary first molar buccal cortical bone, maxillary first molar ...


Diagnostic Ultrasound In The Measurement Of Cortical Bone Thickness In Porcine Mandibular Specimens, Diego Diaz Guerrero 2018 The University of Western Ontario

Diagnostic Ultrasound In The Measurement Of Cortical Bone Thickness In Porcine Mandibular Specimens, Diego Diaz Guerrero

Electronic Thesis and Dissertation Repository

Introduction: Ultrasound (US) is a safe, non-invasive diagnostic method that has been used in various capacities in medicine and dentistry. Periodontal bone loss, bony dehiscence, and gingival recession have been reported as potential risks of orthodontic treatment in patients who have decreased buccal/labial bone thickness. US has the potential to aid in the diagnosis of patients at risk for these possible complications of orthodontic treatment. Purpose: To validate the use of a novel US device in the measurement of buccal cortical bone (BCB) thickness over roots in porcine mandibles. Materials and Methods: Jaw and cortical bone models were constructed ...


Effect Of Clear Aligner Therapy On Masticatory Muscle Tenderness And Orthodontic Pain, Johnny Tran 2018 The University of Western Ontario

Effect Of Clear Aligner Therapy On Masticatory Muscle Tenderness And Orthodontic Pain, Johnny Tran

Electronic Thesis and Dissertation Repository

Introduction: Patients undergoing orthodontic clear aligner therapy (CAT) may experience discomfort in their teeth and jaws, and often present with visible wear on their aligners. This multi-site prospective clinical study aimed to analyze tooth pain and masticatory muscle tenderness in patients subjected to CAT with Invisalign©.

Methods: Twenty-seven healthy adults undergoing treatment with Invisalign© were recruited from three university-based orthodontic clinics. Tooth pain and muscle tenderness were reported on visual analog scales in pain diaries prior to, and after starting CAT. Pressure pain thresholds (PPT) measured using pressure algometers were used to assess somatosensory changes in trigeminal and extra-trigeminal locations ...


Estimating Root Volumes By Limited Segmentation: A Volumetric Analysis Of Cbct And Micro-Ct Data, Theresa C. Baldwin 2018 Loma Linda University

Estimating Root Volumes By Limited Segmentation: A Volumetric Analysis Of Cbct And Micro-Ct Data, Theresa C. Baldwin

Loma Linda University Electronic Theses, Dissertations & Projects

Introduction: The increased dimensional accuracy of images provided by cone beam computed tomography (CBCT) scans allows for more in-depth diagnosis and treatment planning. Expedient interpolation of segmented data that provides clinically acceptable results will encourage clinicians to frequently use CBCT images for clinical/radiographic evaluation. Some of these applications include, quantification of root resorption, determination of force required for specific tooth movements, and customized appliances. Purpose: The study had two purposes. The first was to compare the accuracy of digital tooth volumes acquired from CBCT to the gold standard, micro-computed tomography (micro-CT). The second was to determine the effect of ...


Effect Of Centric Interference On Canine Tooth Wear, Andrey Gaiduchik 2018 Loma Linda University

Effect Of Centric Interference On Canine Tooth Wear, Andrey Gaiduchik

Loma Linda University Electronic Theses, Dissertations & Projects

Purpose: The aim of this study was to determine the long term effect of a centric interference on canine tooth wear (CTW) and on centric occlusion (CO) and maximal intercuspation (MIP) variance. Materials and Methods: Thirty subjects, 11 males and 19 females, were selected based on inclusion and exclusion criteria. Changes in enamel volume were studied between the end of orthodontic treatment (T2) and at least seven years post treatment (T4). All models were scanned using a high resolution desktop scanner, (OrthoInsight 3D Scanner™, MotionView LLC). T4 models were articulated using a Panadent® Articulator and evaluated for dental interferences and ...


Measuring A Sample Of Orthodontic Models/Panographs At Llusd Using The Cr-Eval, Jonathan Michael Drew 2018 Loma Linda University

Measuring A Sample Of Orthodontic Models/Panographs At Llusd Using The Cr-Eval, Jonathan Michael Drew

Loma Linda University Electronic Theses, Dissertations & Projects

Introduction: An index must be used to quantify the improvement in the position of teeth treated by orthodontics. The Cast-Radiograph Evaluation is the index used by the American Board of Orthodontics. The purpose of this study is to use this index to evaluate treatment outcomes in the graduate orthodontic clinic at Loma Linda University from 2012-2016. Materials and Methods: Patients included were comprehensively treated, debonded between 1/1/2012 and 12/31/2016, and under age 30. A total of 80 patients were randomly selected, with 16 coming from each year. The ABO DI was used to score the T1 ...


Reliability And Accuracy Of A Novel Photogrammetric Orthodontic Monitoring System, Vahe Ohanesian 2018 Loma Linda University

Reliability And Accuracy Of A Novel Photogrammetric Orthodontic Monitoring System, Vahe Ohanesian

Loma Linda University Electronic Theses, Dissertations & Projects

Purpose: This study quantitatively investigated the reliability and accuracy of Dental Monitoring’sTM proprietary orthodontic tracking system in comparison to an established reference. Materials and Methods: Intraoral scans (True Definition Scanner, 3MTM) and video scans (iPhone 7, AppleTM) were taken of 30 subjects undergoing comprehensive orthodontic treatment at Loma Linda University’s Graduate Orthodontic Clinic at T1 (initial) and T2 (3 months later). At each time point, an intraoral scan was taken by the operator followed by three video scans- two taken by the patient and one by the operator. Three linear and three angular measurements were analyzed using Dental ...


Accuracy Of Cephalometric Analyses And Tooth Movements Of Conventional Vs Cbct-Generated Cephalograms, Thanh Khong Ng 2018 Loma Linda University

Accuracy Of Cephalometric Analyses And Tooth Movements Of Conventional Vs Cbct-Generated Cephalograms, Thanh Khong Ng

Loma Linda University Electronic Theses, Dissertations & Projects

Purpose: The aim of this study was to compare Ricketts and American Board of Orthodontics (ABO) cephalometric measurements and tooth movements from tracings between conventional lateral cephalograms (Sirona Orthophos XG Plus, Charlotte, NC) and CBCT-generated cephalograms (NewTom 5G; QR srl, Verona, Italy). Materials and Methods: Patients who had bilateral Angle’s class II molar were evaluated. Pre-treatment (T1) and post-treatment (T2) conventional lateral cephalograms (CLCs) and CBCT-generated lateral cephalograms (CBLCs) were traced in Quick Ceph Studio using Ricketts and ABO cephalometric analyses. Linear and angular cephalometric measurements from tracings were compared between the two radiographic modalities using one-sample Wilcoxon signed ...


A Retrospective Cephalometric Growth Study Of Sagittal Airway In Skeletal Class Ii Patients, Sue V. Kim 2018 Loma Linda University

A Retrospective Cephalometric Growth Study Of Sagittal Airway In Skeletal Class Ii Patients, Sue V. Kim

Loma Linda University Electronic Theses, Dissertations & Projects

Purpose: The study retrospectively determined the average sagittal pharyngeal airway widths in Class II males and females between 7 to 16 years of age and changes in sagittal airway with increasing age. Additionally, this study determined whether average airway differs between gender at each age and compared the average airway widths in relation to increasing age between Class I and II patients. Materials and Methods: Longitudinal cephalograms were digitally traced for 38 untreated subjects (23 males, 15 females) from age 7 to 16 with skeletal and dental Class II patterns. These records were previously taken through growth studies conducted between ...


Application Of Mechanical Vibration To Enhance The Stability After Orthodontic Treatment - A Micro - Ct Study, Nicolas Branshaw 2018 Marquette University

Application Of Mechanical Vibration To Enhance The Stability After Orthodontic Treatment - A Micro - Ct Study, Nicolas Branshaw

Master's Theses (2009 -)

Introduction: Mechanical vibration (MV) possesses anti-resorptive properties that can possibly enhance the stability of the dentition during retention, lessening the potential for relapse of teeth to their initial positions. In this project, we established a mouse model and investigated the effects of MV on bone modeling during orthodontic retention. Materials and Methods: Thirty-two 14-week-old inbred strain C57BL/6 male mice were randomly assigned into four groups: 1) Control (N=6); 2) Mechanical Vibration (MV) (N =6); 3) Orthodontic Retention (OR) (N=9); and 4) Orthodontic Retention and Mechanical Vibration (ORMV) (N=11). All mice in OR and ORMV groups received ...


Orthodontic Open-Coil Spring Deactivation Forces Differ With Varying Activation Levels, Ryan Lubinsky 2018 Marquette University

Orthodontic Open-Coil Spring Deactivation Forces Differ With Varying Activation Levels, Ryan Lubinsky

Master's Theses (2009 -)

Coil springs are used in orthodontics to deliver forces to move teeth. However, the optimal amount of activation to produce predictable, continuous deactivation forces, for the purpose of orthodontic tooth movement, is unclear. The purpose of this study was to evaluate the deactivation force characteristics of nickel-titanium open-coil springs after varying levels of activation. Methods: Four open-coil spring products were evaluated: Dentsply GAC 100 gram and 150 gram, Orthoclassic Orthodontics Medium 150 gram, and American Orthodontics nickel-titanium springs. Open-coil springs were compressed (activation) with a universal testing machine to 20, 40, 60, or 80% of original length (15 mm; n ...


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