Orthodontics and Orthodontology Commons^™

Dental Pulp Response To Orthodontic Tooth Movement, Chih-Wei Wang, Kai-Long Wang, Kwok-Hing Ho, Shun-Chu Hsieh, Heng-Ming Chang

Taiwanese Journal of Orthodontics

Pulp vitality may occasionally change while tooth experiencing orthodontic movement, and orthodontists are the particular group who concern this phenomenon if it happens. The respiration rate of dental pulp will be depressed inevitably in short term when tooth is subject to orthodontic force. If force level is extreme, circulatory interruption can occur and further induce pulp necrosis. When orthodontic movement on pulpalcompromised teeth (e.g. teeth with trauma history or large restorations) is required, the pulp response to orthodontic force should be monitored. This article provides an overall review on the pulpal reactions during orthodontic movement and dental movement on teeth …

Combine The Orthodontic-Orthognathic Surgical Correction On Class Ii Division 2 Malocclusion, Supawadee Hasprayoon, Ellen Wen-Ching Ko, Ying-An Chen

Taiwanese Journal of Orthodontics

This case report illustrates a combined orthodontic-orthognathic surgical treatment option for correction of Class II division 2 malocclusion. A 31-year-old female patient, presenting a chief complaint of gummy smile and backward position of anterior teeth, came to seek for treatment. She had skeletal Class II with hypodivergent facial type and mild asymmetric face. Intraoral examination revealed a severe deep bite with 13 mm overbite. The pre-surgical orthodontic treatment consisted of proclination of the maxillary incisors and increased in overjet to provide space for surgical advancement of mandible; the mandibular curve of Spee was partially leveled and maintained some parts of …

Surgical-Orthodontic Treatment With Molar Protraction In A Patient With Skeletal Class Iii Anterior Open Bite And Facial Asymmetry, Yi-Hsuan Chen, Cheng-Hui Lin, Ellen Wen-Ching Ko

Taiwanese Journal of Orthodontics

A 20-year-old young male complained of his protrusive and deviated chin. He also presented occlusal plane cant, anterior open bite and unrestorable maxillary right first molar and mandibular left first molar. The severe maxilla-mandibular discrepancy was solved with surgery-first double jaw orthognathic surgery. The space of two extracted first molars was closed by protraction of the second and third molars after surgery. Two protraction techniques were used in this case, including closing maxillary right first molar space with reciprocal retraction, and closing mandibular left first molar with one miniscrew as an absolute anchorage. Careful biomechanical consideration was used during protraction …

A 4-Year Follow-Up Of A Rare Case With Ectopic Eruption Of The Permanent Second Molars Associated With Resorption Of The Permanent First Molars, Hui-I Chen, Wen-Hui Hsieh, Chih-Hsiang Chan, Hsuan-Fang Lai

Taiwanese Journal of Orthodontics

A rare case-a 11-year-old boy with ectopic eruption of all the permanent second molars associated with resorption of all the permanent first molars was reported. Severe root resorption was found in the mandibular first molars, while moderate root resorption was found in the maxillary first molars. There were several points should be addressed into consideration: (1) young age; (2) the third molars will probably be brought into occlusion in the future; (3) Class III jaw relationship. The orthodontic treatment was approached with two-stage. Stage I treatment was aimed to upright the mandibular second molars after removal of the mandibular first …

Molar Distalization By Temporary Anchorage Devices (Tad S) – A Review Article, Jun Ming Tan, Yi-Min Liu, Hung-Cheng Chiu, Yi-Jane Chen

Taiwanese Journal of Orthodontics

Clinically, there are many ways to achieve molar distalization, such as skeletal anchorage, extraoral anchorage, sliding jig, lip bumper, and pendulum, etc. Although several methods have been described to distalize molars or total dentition, there is no strong scientific evidence of the effectiveness of various methods. To date, temporary anchorage devices (TADs) are increasingly used as orthodontic anchorage sources because of its strong anchorage, including endoosseous implants, miniplates, miniscrews and microscrews. Application of bony anchorage makes teeth move more efficiently, without depending on patient compliance in wearing appliance. However, only case reports and small case series have been published on …

Segmental Maxillomandibular Rotational Advancement To Correct Obstructive Sleep Apnea In A Patient Skeletal Class Ii Malocclusion - A Case Report, Yea-Ling Yang, Sam Sheng-Pin Hsu, Clement Cheng-Hui Lin

Taiwanese Journal of Orthodontics

The first priority to solve the sleep-disordered breathing could be soft-tissue surgery or non-surgical therapy such as continuous positive airway pressure (CPAP). However, in patients with incomplete remission or relapse, the sleep quality and day time symptoms may persist. The case report presented a young man with main problems of obstructive sleep apnea (OSA) and Skeletal Class II maxillary protrusion. We proposed a segmental maxillomandibular rotational advancement (SMMRA) with surgery-first procedure at the end of his puberty. The surgical orthodontic treatment achieved good outcome of function and esthetics at the same time. The polysomnogrphic data and airway dimension were dramatically …

Surgical-Orthodontic Treatment Of A Patient With Severe Skeletal Class Iii Anterior Open Bite And High Mandibular Plane By Preserving The Posterior Facial Height, Tz-Ya Hung, Wei-Cheng Lee, Benjamin Lo, Philip Kuo-Ting Chen, Lih-Juh Chou, Chung-Hsing Li

Taiwanese Journal of Orthodontics

Class III malocclusions with a hyperdivergent vertical facial pattern are often difficult to treat without combining the surgical-orthodontic approach. The aim of this article is to present a collaborative management of a case with severe skeletal class III and anterior open bite. The 19-year-old man was characterized with midface deficiency, mandibular prognathism, high mandibular plane angle, long lower facial height, and excessive anterior open bite. The achievement of a stable surgical setup in interdigitation prior to orthognathic surgery (OGS) is critical for a successful treatment via dental decompensation. Two-jaw surgery with clockwise rotation of the maxilla and bilateral sagittal split …

Radiographic Predictors Affecting On The Duration Of Treatment For Maxillary Impacted Canine, Jen-Bang Lo, Chen-Jung Chang, Hsiu-Ming Hsu, Jia-Kuang Liu

Taiwanese Journal of Orthodontics

The purpose of this study was to investigate radiographic predictors of impacted maxillary canine related to the duration of treatment time. A total of twenty-four maxillary impacted canines with surgical exposure and orthodontic treatment were collected. The average age of the patients was 13.7 years at the beginning of treatment and the study included 9 males and 14 females. There were sixteen impacted teeth on the buccal side and eight on the palatal side. Four panoramic radiographic predictors including canine angulation, mesiodistal position, vertical position and root formation related to the duration of orthodontic treatment were assessed. The duration of …

Non-Surgical Treatment Of An Adult Class Iii Malocclusion Patient With Facial Asymmetry By Unilateral Mandibular Arch Distalization, Chi-Yu Tsai, Shiu-Shiung Lin, Yi-Hao Lee, Li-Tyng Sun, Yu-Jen Chang, Te-Ju Wu

Taiwanese Journal of Orthodontics

This article reports the treatment of a 22-year-old male with Class III malocclusion and facial asymmetry by non-surgical camouflage orthodontic approach. This patient presented with anterior crossbite and deviated midline, mild protrusive mandible and chin deviation. The Class III malocclusion was marked with anterior functional shift resulted from the premature contact of the incisors. Unilateral mandibular buccal shelf miniscrew was applied for the correction of the skewed mandibular arch. After treatment, the deviated dental midline and Class III molar relation were both corrected. This patient exhibited harmonious profile and occlusion.

Camouflage Orthodontic Treatment For Adultpatient With Skeletal Class Iii Malocclusion And Bilateral Posterior Cross-Bite, Rouh-Hwai Wang, Hsin-Lan Shen

Taiwanese Journal of Orthodontics

This 23-year-old female presents with skeletal Class III malocclusion, complicated by prominent chin projection, bilateral posterior lingual cross-bite, missing of bilateral maxillary first molars, and severely lingualtilted lower second molars. The treatment modality was conventional edgewise appliance with bilateral lower first premolar extraction. A favorable result of ideal overbite and overjet and correction of bilateral posterior cross-bite were achieved. The patient was satisfied the improvement of function and esthetics after treatment.

Maxillofacial Distraction Osteogenesis, Hong-Po Chang, Tsau-Mau Chou, Yu-Chuan Tseng, Jen-Hao Chen, Han-Jen Hsu, Pao-Hsin Liu

Taiwanese Journal of Orthodontics

Distraction osteogenesis in the maxillofacial skeleton is an increasingly popular alternative to many conventional orthognathic surgical procedures. This review summarizes recent data regarding the biological and biomechanical basis of distraction osteogenesis, its advantages and disadvantages, and special considerations in maxillofacial distraction. Intraoral mandibular distraction osteogenesis, maxillary and midfacial distraction, and alveolar distraction osteogenesis are discussed. This review also discusses sutural expansion/maxillary protraction osteogenesis and orthodontically induced periodontal osteogenesis, which are similar to physeal osteogenesis. In the near future, improved understanding of biomolecular mechanisms that mediate distraction osteogenesis may guide the development of targeted strategies that use molecular mediators, growth factors, …

Solving The Complications Of Treating A Unilateral Submerged And Ankylosed Maxillary Permanent First Molar – A Case Report, Han-Wen Yang, Hsin-Yi Lo, Kwong-Wa Li, Liang-Ru Chen

Taiwanese Journal of Orthodontics

The study reported an adult orthodontic case with a unilateral ankylosed upper permanent first molar. A number of complications occurred, including occlusal plane canting, dental midline deviation and asymmetric molar relationship. The case demonstrated the mechanics used to solve all the complications we met. The case also showed the phenomenon that after extraction of the ankylosed tooth, the bone remodeling mechanism of the bone in situ seemed abnormal and resulted in difficulty of protracting the tooth into the extracted site. All the above reasons, therefore, resulted in prolonged treatment time. In addition, the case also demonstrated the method we used …

Using The Forsus Appliance To Correct Class Ii Mandibular Asymmetry In A Growing Patient: A Case Report, Yun-Fang Chen, Yu-Fang Liao

Taiwanese Journal of Orthodontics

The case report described the orthodontic treatment of a 13-year-old male patient diagnosed as Angle Class II Division 1 subdivision left malocclusion with deep bite and spacing. The chief complaint was protrusive upper front teeth prone to injury. Non-extraction treatment with Forsus appliance and Class II elastics was used to correct the Class II relationship on the left side, and to improve the deviated mandibular dental midline, protrusive front teeth and lips, and lip incompetence. Although there were residual mandibular dental deviation of 0.5 mm and lip incompetence, the patient and his parents were satisfied with the treatment results revealing …

An Investigation Of Surface Characteristics Of Enamel Treated With Infiltrative Resin: A Scanning Electron Microscopy Study, Danielle E. Easterly

Theses and Dissertations

AN INVESTIGATION OF SURFACE CHARACTERISTICS OF ENAMEL TREATED WITH INFILTRATIVE RESIN: A SCANNING ELECTRON MICROSCOPY STUDY

Danielle E. Easterly, Doctorate of Dental Surgery.

A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Dentistry at Virginia Commonwealth University.

Virginia Commonwealth University. 2017.

Director: Dr. Eser Tüfekçi

D.D.S., M.S., Ph.D., M.S.H.A.

Objective: To evaluate the microstructural changes of a resin infiltrant (ICON®, DMG America LLC, Englewood, NJ) after six months of simulated toothbrushing.

Materials and Methods: Ten extracted third molars (n=10) were collected. Artificial white spot lesions were created and resin applied. Environmental SEM …

Work-Related Musculoskeletal Disorders Among Dentists And Orthodontists, Natalie R. La Rochelle

Theses and Dissertations

WORK-RELATED MUSCULOSKELETAL DISORDERS AMONG DENTISTS AND ORTHODONTISTS

A thesis submitted in partial fulfillment of the requirements for the degree of

Master of Science in Dentistry at Virginia Commonwealth University.

by

Natalie R. La Rochelle

Thesis Director: Dr. Eser Tüfekçi, D.D.S., M.S., Ph.D., M.S.H.A.

Professor, Department of Orthodontics

Virginia Commonwealth University

Richmond, Virginia

May 2017

The practice of dentistry is physically demanding due to static and dynamic postures sustained daily throughout careers. Previous literature suggests that work-related musculoskeletal disorders (WMSD) are not solely the result of work habits, but also due to the individual, his or her physical makeup, genetics, and …

Comparison Of Intraoral And Extraoral Scanners On The Accuracy Of Digital Model Articulation, Jason L. Porter

Theses and Dissertations

Introduction: Orthodontists increasingly rely on digital models in clinical practice. The ability of modern scanners to articulate digital models must be scientifically evaluated. Methods:Twenty five digital articulated models were produced from four digital scanners in five experimental groups. The resulting inter-arch measurements were compared to the gold standard. An acceptable range of 0.5mm more or less than the gold standard was used for evaluation. Results: iTero® and iTero® Element yielded all acceptable inter-arch measurements. The 3M™ True Definition and Ortho Insight 3D® with Regisil® bite registration produced four of six acceptable inter-arch measurements. The Ortho Insight 3D® with Coprwax ™ …

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 …

Effects Of Flash-Free Technique On Plaque Retention, White Spot Lesions, And Bracket Failure: A Randomized Clinical Trial, Payam Ishani Afousi

Theses & Dissertations

A side effect of orthodontic treatment is the development of white spot lesions (WSLs). This thesis attempted to evaluate the effects of the use of APC™ Flash-Free (FF) and conventional adhesives in bonding of orthodontic brackets on plaque formation and retention, WSL development, and bracket failure in-vivo. This was accomplished by collecting plaque samples from around orthodontic appliances and analyzing them using ATP-driven bioluminescence; scanning enamel surfaces using the Canary System™ to evaluate WSL development, and counting the number of spontaneous debonding of brackets of the 4 maxillary incisors in the first 6 months of treatment. It was found …

Comparison Of Two Methods Of Transpalatal Arch And Lingual Arch Activation, Taoran Zhang

Loma Linda University Electronic Theses, Dissertations & Projects

The TPA and LA can be activated with two methods: the “shape-driven method” where the appliance is made to match the final tooth position and the “force-driven method” where the appliance is made to make sure the force system delivered by it at the beginning is consistent with the planned tooth movement. This study compared the two methods in vitro quantitatively with typodont teeth and multi-axis force torque transducers in all three dimensions. Results: In the TPA first order activation, with comparable Fy (force on Y axis) reading, the shape-driven activation group had a significantly higher Mx (moment on X …

A Cbct Study Of Pharyngeal Airway Changes Due To Fixed Functional Appliances, Scott T. Peterson

Loma Linda University Electronic Theses, Dissertations & Projects

Introduction: The purpose of this retrospective study, using head and neck Cone-Beam Computed Tomography (CBCT) images, was to measure and compare volumetric, area, and linear changes of the pharyngeal airway space in patients treated with a MARA or Herbst Class II correction appliances. Materials and Methods: Twenty-six patients treated with a MARA (mean age 13.2), nine with a Herbst (mean age 12.12) , and a control group twenty-five orthodontically treated class I patients (mean age 13.11). T1 and T2 CBCT images were measured and compared between the three groups for area, length, and width measurements along the velo-, oro-, and …

An Evaluation Of Root Length Change Measurements Using Intraoral Scan And Panoramic Radiographs, Elijah C. Wang

Loma Linda University Electronic Theses, Dissertations & Projects

Introduction: This study was intended to evaluate the accuracy of using panoramic radiographs to measure root length change over the course of orthodontic treatment, using intraoral scans of crowns, and a mathematical model to account for distortions in the radiographs. The study additionally evaluated whether a best-fit equation could be created from the calculated data to minimize differences to the measurements of root resorption made on CBCT scans. Materials and Methods: Twenty-one patients were selected who had comprehensive orthodontic treatment, and all teeth in the upper right quadrant were evaluated in this study. T1 and T2 CBCT images were compared …

Correlation Of Tooth Length Measurements Made On Cbct And 3t Mr Images, Andrew Scott Taylor

Loma Linda University Electronic Theses, Dissertations & Projects

Objective. This study compared tooth length measurements made on cone beam computed tomography (CBCT) scans and 3-Tesla (3T) magnetic resonance (MR) scans performed with and without an alginate bite registration surrounding the crowns of the teeth. Materials and Methods. One CBCT scan, one MR scan with alginate bite registration, and one MR scan without bite registration were performed on 12 subjects. The alginate bite registration was used to provide a proton-rich material to surround proton-poor teeth in an attempt to improve visualization of teeth. DICOM formatted images from each of the three scans for each subject were oriented in all …

The Effect Of Orthodontic Treatment On Sagittal Root Position Of The Maxillary Central Incisor, Jeremy Haines

Loma Linda University Electronic Theses, Dissertations & Projects

Introduction: Sagittal root position (SRP) of maxillary incisors is an important factor in implant treatment planning. Kan et al defined four classes of SRP in an effort to aid implant placement treatment planning and these SRP classifications represent a novel approach to describing bone changes around the maxillary incisors. The effect of orthodontic tooth movement, specifically changes in inclination, on SRP is of interest in potentially facilitating immediate implant placement. Purpose: The purpose of this study was to use Cone Beam Computed Tomography (CBCT) to evaluate the adaptation of alveolar bone around the maxillary incisors as a result of orthodontic …

Ricketts Analysis Using Conventional And Dolphintm Generated Cbct Lateral Cephs, Yeganeh Parhizkar Jewell

Loma Linda University Electronic Theses, Dissertations & Projects

Purpose: The aim of this study was to evaluate the difference between Ricketts analysis measurements made on Sirona Orthophos XG Plus (Sirona Dental Systems, Charlotte,NC) lateral cephalograms, and DolphinTM generated perspective and orthogonal lateral cephalograms from CBCT (NewTom 5G; QR srl, Verona, Italy). Materials and Methods: A Sirona digital lateral cephalogram and DophinTM synthesized CBCT lateral cephalograms of a radiographic phantom in orthogonal and perspective projections were created. Horizontal and vertical measurements were made in multiple planes on the radiographic phantom to compare each imaging modality. Twenty-five lateral cephalometric radiographs were selected retrospectively from the records of patients of …

Thermal Properties Of Copper Nickel-Titanium Orthodontic Archwires, Joshua Gilbert

Master's Theses (2009 -)

Introduction: Copper Nickel-Titanium (CuNiTi) is a relatively new composition of Nickel-Titanium (NiTi) archwires that was originally patented in 1991 as part of the Ormco line of wires. The patent has now recently expired and many other orthodontic companies are making their own CuNiTi wires. Advertisement claims have focused on the laboratory benefits of adding Copper (Cu) to the NiTi, however few independent laboratory testings have been conducted on these new wires to verify claims. The purpose of this study was to conduct thermal analysis of CuNiTi for all currently available wires in two Austenite Finish (Af) variants and two commonly …

Mechanical Properties Of Copper-Nickel-Titanium Archwires, Margaret Amelia Rosen

Master's Theses (2009 -)

Introduction: The initial phase of orthodontic therapy relies on flexible wires, usually composed of a nickel-titanium alloy, to apply a substantially constant load during tooth movement. Copper has been added to nickel-titanium archwires, resulting in an alloy with potential clinical advantages such as a lower stress hysteresis. Many orthodontic companies claim that their copper-nickel-titanium manufacturing process allows for the production of more consistent transition temperatures in the wires, allowing the orthodontist to customize treatment to various patients based on the force level needed. There are currently many manufacturers of these wires, creating a wide range of copper-nickel-titanium archwires from which …

The Effect Of Orthodontic Appliances On The Evaluation Of The Professionalism And Esthetics Of An Adult Employee, Laura Hanson Vaccariello

Master's Theses (2009 -)

This study explored the influence of fixed and removable orthodontic appliances on participants’ ratings of the job performance, intelligence, and attractiveness of an adult female. Ninety-four adult subjects were recruited from the Graduate School of Management at Marquette University. Each subject received an identical employee performance review with an attached photograph of a female employee. The smile of the photo was manipulated to represent one of four conditions: no orthodontic appliance, a metal orthodontic appliance, a ceramic orthodontic appliance, or a clear aligner. Subjects then rated the employee on three continuous Likert scales. Ratings of job performance, intelligence, and attractiveness …

The Effects Of Mechanical Vibration On Human Chondrocytes In Vitro, Bradley J. Gauthier

Master's Theses (2009 -)

Introduction: Inflammation is the biological basis of temporomandibular joint disorders (TMD), when severe it can lead to osteoarthritis. One of the physical therapies used to manage this condition is mechanical vibration, as has been used in medicine for many years as a non-pharmacological therapy. Recently an FDA approved dental device called AcceleDent has been introduced to increase the rate of tooth movement and decrease pain. As the device-generated vibration transmits to the TMJ, it is important for us to investigate whether mechanical vibration influences TMJ on its biologic basis – chondrocytes under normal and inflammatory conditions. Materials and Methods: Human …

The Effect Of Mechanical Vibration On Human Pdl Cell Differentiation And Response To Inflammation, Megan Desroches

Master's Theses (2009 -)

Low magnitude mechanical vibration is a therapeutic adjunct being investigated to alter bone remodeling and inflammation in areas such as osteoporosis, bone fracture healing, and muscle soreness after exercise. In orthodontics a device named AcceleDent has been marketed that claims to increase the rate of tooth movement and decrease pain. However evidence for these claims is lacking. In this study we looked at two potential cellular mechanisms for these claims: periodontal ligament (PDL) cell differentiation and inflammation under an orthodontic model of strain (IL-1β). Increased PDL cell differentiation into osteogenic cells could be an avenue of increasing orthodontic tooth movement. …

Analysis Of Slot Height Accuracy And Precision Of Stainless Steel Orthodontic Brackets Manufactured By Metal Injection Molding And Computer Numerical Control Milling Using Stereomicroscopy, Mark D. Angeloni

MUSC Theses and Dissertations

Objective: It is the objective of this study to determine the dimensional accuracy and precision that is achievable by two manufacturing methods of stainless steel orthodontic brackets, CNC milling and metal-injection molding. To determine this, we propose the following specific aims: 1) to determine the actual dimensions of the slots in both milled and MIMed orthodontic bracket and standard deviations. 2) Using mathematical models to determine if the dimensional difference, if one exists, between milled and MIMed brackets will result in a difference in third order tooth movement (torque) realization (effective torque vs nominal torque). The actual bracket slot dimensions …