Orthodontics and Orthodontology Commons^™

Management Of A Patient With Euryprosopic Face And Upper Central Diastema, Chung-Teng Chang, Yi-Min Liu, Yuen-Yung Tsang, Huei-Mei Tsai

Taiwanese Journal of Orthodontics

An adult female has upper central diastema complicated with a complete deep bite and spacing in lower dentition. The broad face and ovoid shaped dental arch form require special attention as an intrinsic transverse dimensional skeletal malocclusion. The treatment modality therefore should be totally different from other deep bite cases with crowding or tapered dental arch. The space retention after active treatment is of prime important. Root divergence of upper incisors and bodily protraction movement of lower posterior teeth were the main concerns during treatment. Fixed lingual retainer and long term follow up are essential for stable outcome.

Validating The 3d And 2d Mandibular Plane To The Frankfort Plane For Craniofacial Measurement, Jason Jyun-Chen Kuo, Ellen Wen-Ching Ko

Taiwanese Journal of Orthodontics

Purpose: This study evaluated whether the three-dimensional (3D) plane-to-plane mandibular plane angle measurement method could be applied in clinical analysis in a manner similar to the application of conventional two-dimensional (2D) cephalometric measurement, regardless of whether patients had symmetrical planes. Patients and methods: This retrospective study selected 30 patients who had undergone both lateral cephalometric radiography and cone beam computed tomography (CBCT). The 2D measurement was manually traced from the lateral cephalometric radiographs for the Frankfort horizontal plane line and mandibular plane line (2D FMA). The 3D reconstructions for each patient in the CBCT were evaluated using 3D software and …

Class Ii Deep Bite Malocclusion Corrected By Two-Stage Approach, Meng-Yun Tsai, Wei-Ting Tseng, Li-Fang Hsu, Kelvin Wen-Chung Chang, Jenny Zwei-Chieng Chang, Eddie Hsiang-Hua Lai

Taiwanese Journal of Orthodontics

In Class II deep-bite malocclusions with growth potential, we could combine orthodontic treatment with orthopedic methods to achieve stable occlusion. The case was a 12-year-old male presented with Class II malocclusion, deep-bite, and low mandibular plane angle. In the stage I treatment, headgear was used to restrict the growth of maxilla. Bilateral Class III molar relationship was gained. After re-evaluation, stage II treatment was started from full mouth banding and bonding, with emphasis on leveling lower curve of Spee and intruding lower anterior teeth by placing reverse curve of Spee in the archwire and intrusive arch to solve the deep …

Long-Term Observation Of Orthodontic Management And Facial Growth On A Patient With Familial Cleidocranial Dysplasia, Chung-Yi Ho, Ellen Wen-Ching Ko, Cheng-Hui Lin

Taiwanese Journal of Orthodontics

The orthodontic management of patients with cleidocranial dysplasia (CCD) is challenging, which takes a long treatment duration and observation to follow the progress. The completion of treatment is usually not finished until growth completion. This case describes the long-term stage treatment of a 22-year-old female presented with familial CCD. The first stage orthodontic treatment was separated into two phases including surgical exposure of the anterior and posterior teeth, respectively. Extraction of the delayed exfoliated deciduous incisors and supernumerary teeth to clear the eruption path of the submerged permanent anterior teeth was started at her age of 8. The impacted anterior …

Correction Of Skeletal Class Iii Malocclusion With Four Missing Premolars By Surgery-First Approach, Yi-Bo Huang, Chia-Yi Pan, Yu-Ling Cheng, Shih-Wei Pan

Taiwanese Journal of Orthodontics

A 21-year-old female with severe concave profile and prominent chin came for surgical-orthodontic consultation. The patient had missing of four premolars which became intricate with extremely lingual inclined incisors and over-developed mandible. The surgery first approach (SFA) was adopted to correct the skeletal factors at the early stage. The pre-adjusted orthodontic bracket system was applied to normalize the torque of the teeth afterward. The capacities of anterior root-torquing auxiliary wire (ART) and multiple-loop edgewise archwire (MEAW) will be discussed, accordingly. The progress records showed remarkable improvement of profile and occlusion. The change of upper incisor show was also discussed. The …

Impact On The Pharyngeal Airway Space After Maxillomandibular Advancement Procedure For Obstructive Sleep Apnea Patients, Ghaddy Alsaty

Graduate Theses, Dissertations, and Problem Reports (ETD)

Background and Objectives: Obstructive sleep apnea (OSA) is a sleep-related breathing disorder, characterized by disrupted snoring and repetitive upper airway obstructions. Continuous positive airway pressure (CPAP) is considered the therapeutic mainstay for OSA patients. However, CPAP therapy has compliance limitations. An alternative treatment options is maxillomandibular advancement (MMA) surgical procedure. Genial tubercle advancement (GTA) is often performed concomitant with MMA for esthetic purposes. Cone-beam computed tomography (CBCT) provides the ability to visualize the upper airway and perform three-dimensional (3D) reconstructions. The purpose of this study is to evaluate the impact of MMA procedure with or without GTA on oropharyngeal …

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 (ETD)

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 after …

Type Of Tooth Movement During En Masse Retraction Of The Maxillary Anterior Teeth Using Labial Versus Lingual Biocreative Therapy In Adults: A Randomized Clinical Trial, Islam Tarek, Mayse Sadek, Noha Sabet

Dentistry

No abstract provided.

Orthodontic Correction Of Transposed Maxillary Canine And First Premolar In Mixed Dentition, Lan-Tien Lin, Yi-Min Liu, Yuen-Yung Tsang

Taiwanese Journal of Orthodontics

Transposition is rare and occurred commonly on maxillary canine and premolar. To extract or not to extract, to correct or not to correct the dental transposition teeth, it’s a tough decision. A 12-year-old boy was referred for orthodontic correction because of bad alignment at upper dentition. His dental age was in late mixed dentition. Both upper deciduous canines were still retained. Left canine was buccally blocked-out, and first premolar was in palatal crossbite with the lower premolars. Panoramic film showed impacted upper right canine and transposed left canine and first premolar. The treatment duration took 3.5 years. The upper left …

To Do Or Not To Do? Slow Orthodontic Extrusion For Implant Site Development In Esthetic Zone At The Anterior Maxilla, Hui-Chen Tsai, Chung-Chen Jane Yao, Cheing-Meei Liu

Taiwanese Journal of Orthodontics

Slow orthodontic extrusion (SOE) for implant site development, was introduced in 1991. It has been more than 20 years since this treatment was applied in our clinical practice. In this paper, we investigate surgeon's expectation of SOE for special requirements of immediate implantation by a clinical case. We also review case reports/case series searched from PubMed and inspect the power of evidence of these reports from the integration of data collection, and try to define the value of SOE. If the SOE cannot eliminate at least one surgical procedure, we need to consider the necessity of SOE before implant surgery.

A Modified Surgery-First Approach For Mandibular Prognathism With Proclined Maxillary Incisor And Mandibular Spacing, Jutharath Chanruangvanich, Ellen Wen-Ching Ko, Ying-An Chen

Taiwanese Journal of Orthodontics

This case report describes the management of an adult patient presenting with a skeletal Class III malocclusion, mandibular protrusion, upper incisor proclination and mandibular arch spacing by a modified surgery-first approach. A 26-year-old man had skeletal Class III and dental Class III malocclusion with concave facial profile, midface deficiency and mandibular prognathism with chin deviation to left. His dental manifestation presented anterior crossbite, upper incisors proclination and spacing in his mandibular arch. Treatment was performed with a modified surgery-first approach, which included a short presurgical alignment phase. In the maxilla, the significant maxillary crowding was relieved by 14 and 24 …

Orthodontic Treatment Of Class Ii Malocclusion With Single Maxillary Incisor, Chien-Cheng Chen, Yi-Horng Chen

Taiwanese Journal of Orthodontics

Orthodontic treatment of a Class II malocclusion case with single maxillary central incisor was presented in the case report. The treatment plan consisted of removing one maxillary central incisor instead of premolars. Bilateral maxillary lateral incisors were mesialized for space closure and substitution for maxillary central incisors. The morphology of maxillary lateral incisors was modified to mimic the maxillary central incisors. After treatment, both occlusion and esthetics was improved, and the patient was satisfied with the results.

A Comprehensive Diagnostic System For Orthodontists- Beyond Angle’S Classification, Ib Leth Nielsen

Taiwanese Journal of Orthodontics

Traditionally orthodontists have used the classification system developed by Edward H. Angle in 1900 to describe the malocclusion of an orthodontic patient. This classification is very limited with respect to the information it provides and should be replaced by a more detailed and inclusive description of a patient’s malocclusion as well as the underlying biology. In this review article we propose a new technique that ensures all pertinent information gets considered and we suggest a systematic approach to a more differentiated orthodontic diagnosis. Our approach divides the diagnosis into clearly defined categories that bring together the clinical findings into a …

Mandibular Molar Protraction For Edentulous Space Closure: A Systematic Review, Yueh-Tse Lee, Proudchompoo Paungmalit, Eric Jein-Wein Liou

Taiwanese Journal of Orthodontics

Objective: Orthodontic molar protraction into the edentulous space is a treatment option for patients with missing mandibular molars or premolars. Space closure by moving the molars mesially into edentulous ridge is difficult, especially in the mandible. This systematic review aimed to evaluate the dental and periodontal changes after mandibular molar protraction into an edentulous ridge. Material and Methods: Literature search was conducted using PubMed, Medline (Ovid), Cochrane Library, Web of Science, and Scopus until September 2019 limited to English publications. Specific inclusion and exclusion criteria were extracted and analyzed. Study quality was objectively assessed. Results: In total, 490 studies were …

Factors Influencing Fixed Orthodontic Treatmentoutcomes In A University Dental Clinic, Zhan Yan Fang, Sneha Ravindranath, Allan Pau

Taiwanese Journal of Orthodontics

Objective: To assess the orthodontic treatment outcomes in a university dental clinic and to determine factors associated with the treatment outcomes. Methods and materials: Firstly, the records of all patients who have completed fixed orthodontic treatment from 2012 to 2017 were identified and included in the study. Age at start of treatment, gender, decayed, missing filled teeth (DMFT), malocclusion classification, type of appliance used and type of treatment (extraction or non-extraction) were recorded. The pre-treatment and post-treatment study models were assessed by the Peer Assessment Rating (PAR) Index. The treatment outcomes were tabulated in a nomogram to show the proportions …

Management Of Congenital Missing In Bilateral Mandibular Incisors, Yun-Ting Huang, Chien-Wei Chao, Po-Yu Yang, Chia-Tze Kao

Taiwanese Journal of Orthodontics

This case report described the management of congenital missing bilateral mandibular central incisors in a 16 years-old female patient who was diagnosed as Angle’s Class I molar malocclusion, canine Class II relationship by a treatment plan of orthodontic space regain. The options of fixed bridge, removable partial denture or dental implants to replace the missing teeth were well explained to the patient by prosthodontic consultation. After the orthodontic alignment, the treatment results demonstrated that the initial profile of the patient was maintained, the missing teeth was later replaced by removable partial denture. The interdisciplinary therapy between orthodontics and prosthodontics should …

The Orthodontic Treatment Of Class Iii Malocclusion With Anterior Cross Bite And Severe Deep Bite, Chieh Yang, Yu-Chuan Tseng

Taiwanese Journal of Orthodontics

This 22-year-old female presents with skeletal Class III malocclusion, complicated by anterior cross bite, deep bite, and congenital missing of bilateral mandibular second premolars. The treatment modality was fullmouth fixed edgewise appliances. A favorable result of ideal overbite and overjet and closure of bilateral spaces of missing teeth were achieved. The patient was satisfied the improvement of function and esthetics after treatment.

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

Graduate Theses, Dissertations, and Problem Reports (ETD)

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. …

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 …

Frictional Properties Of Novel Bracket Systems: An In-Vitro Study, Stephen M. Haverkos

Theses and Dissertations

Orthodontic brackets undergo resistance during sliding that includes classical friction, binding, and notching. Current bracket systems are hampered by these challenging forces. As a result, the clinician usually needs to apply additional forces to overcome the resistance which increases the risk of root resorption and discomfort for the patient. This study evaluated frictional properties of a novel bracket that had polytetrafluoroethylene (Teflon™) coated rollers in its design. Five types of brackets (n = 10, each), including a passive self-ligating bracket, a traditional ligated bracket, a three-dimensionally printed direct metal laser sintering (DMLS) bracket with and without Teflon™ rollers, and computer …

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 pose on …

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 …

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 Forsus^TM, 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 …

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 …

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 …

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 axial …

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 models, and the CR-Eval …

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 Monitoring’sTM tracking …

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 …

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 rank …