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Invited Speakers
Invited Speakers
  • Jeffrey P Okeson

    Nationality:United States

    Lecture :
    New Perspectives on TMD: A Diagnostic Challenge

    Lecture language: English

    (The speech recording will be available on-demand for one week.)
    CV or Autobiography :
    Education and Professional Experiences: 
    Professor and Dean, University of Kentucky College of Dentistry, US
     
    Research Experience: 
    Okeson JP: The Clinical Management of Occlusion and Temporomandibular Disorders. 8th edition, Elsevier Publisher, 2019 (8 editions, translated into 12 foreign languages). 
    Okeson JP: Bell’s Oral and Facial Pains: 7th edition, Quintessence Publisher, (translated into 5 foreign languages).
    240 other scientific publications (articles, book chapters, etc.)
     
    Awards and Honors: 
    Awarded the first ever “Distinguished Alumnus Award” The University of Kentucky College of Dentistry Alumni Association, 2004
    “The International Dentist of the Year Award” The Academy of Dentistry International, 2008
    The “Provost’s Distinguished Service Professorship” University of Kentucky, 2009
    The Governor’s Council on Post Secondary Education’s Acorn Award, awarded to the Top University Educator in the State of Kentucky
    Awarded the “University of Kentucky Hall of Distinguished Alumni”.
     
    Abstract:
    There are many concepts in dentistry associated with temporomandibular disorders. Some of these concepts are supported by sound data and many are not. This presentation will highlight some of the facts and fantasies related to the etiology of TMD. Evidence-based dentistry will be presented that has changed our understanding and approach to managing TMD. The role of orthodontic therapy in managing TMD will be discussed along with many diagnostic challenges of TMD.
     
    Objectives:
    * Describe five potential risk factors for TMD.
    * Identify how orthodontic therapy may influence TMD. 
    * Describe the relationship of bruxism to TMD.
    * Explain the importance of taking an accurate history for the TMD patient.
     
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  • Nikhilesh Vaid

    Nationality:India

    Lecture :
    Artificial Intelligence Driven Orthodontic Care: A Flight to Utopia?

    Lecture language: English

    (The speech recording will be available on-demand for one week.)
    CV or Autobiography :
    Leadership Positions & Honors:
    President, World Federation of Orthodontists
    Professor and Vice Dean -Academics at the European University, DHCC, Dubai.
     
    Awards & Honors :
    Awarded the Best Paper & Poster award by the Indian Orthodontic Society on 4 occasions for clinical (4) and research (3) presentations.
    Co-author for best Research article award by APOS Trends in 2018.
    Guided (Supervisor/Co-author) in 9 award winning student research papers/posters and table clinics including the Best Table Clinic Award at the American Association of Orthodontists’ Annual Session in 2017. 
    Total student poster/paper presentations mentored:
        Under-graduate: 27
        Post-graduate: 168
        Doctoral: 4
     
    Abstract
    AI applications in Orthodontics are relatively young but growing at a rapid pace.
    This presentation aims to- 1) Explain conceptually how AI algorithms work. 2) Classify AI applications and their scope in orthodontics. 3)Assess clinical scope, performance and risks associated with therapeutics. 4)Propose an outline for audit of AI applications in orthodontics. 
    The lecture will explain how AI is a set of tools for problem-solving that can assist orthodontists with extra powerful and applied tools to provide better standards of care. AI can assist orthodontists to choose the best way to move a tooth or group of teeth, but AI today completely ignores the existence of oral diseases, does not fully integrate facial analysis in its algorithms, and is unable to consider the impact of functional problems in treatments. 
    The lecture will also dwell upon the risks associated with AI application.As AI enters practice, clinicians need to know how law will assign liability for errors that arise from interaction between algorithms and practitioners. These issues are likely to arise sooner rather than later. Responsibility and the varied scope of these applications will also be deliberated.
     
     
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  • Eric Liou

    Nationality:Taiwan

    Lecture :
    Dissect Mandibular Asymmetry for Orthodontic Treatment with Orthognathic Effects


    Lecture language: English

    (The speech recording will be available on-demand for one week.)
    CV or Autobiography :
    1. President, Asian Pacific Orthodontic Society
    2. Editor in chief of APOS Trends in Orthodontics
    3. Past President, Taiwan Association of Orthodontists

    Abstract

    A mandibular asymmetry could be due to the right and left side differences in condylar/ramal/mandibular body size, morphology, condyle position in TMJ, or combination of the above. Improvement of mandibular asymmetry had been considered not possible merely through orthodontic treatment. Interestingly, we found recently in some patients their mandibular asymmetry could be improved orthodontically with certain degree of orthognathic effects after correction of occlusal cant or by application of the bite raisers or slopes, although the results variated from patient to patient. Due to the variated treatment results, the current unsolved question in orthodontic managements for improving mandibular asymmetry without jaw surgery is who are the indications. The purpose of this presentation is to decipher the orthodontic indications for improving mandibular asymmetry through meticulous dissection of the causes of mandibular asymmetry, to illustrate the orthodontic mechanics and appliances for the improvements, and to exam the adaptations of the mandibular condyle during and after orthodontic treatment.

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  • Birte Melsen

    Nationality:Denmark

    Lecture :
    Are We Treating Patients or Cases

    Lecture language: English

    (The speech recording will be available on-demand for one week.)
    CV or Autobiography :
    Education and Professional Experiences:
    1. Previous Head of Department of Orthodontics, University of Aarhus Denmark
    2. Visiting Professor of NYU, US
     
    Awards and Honors: 
    1984 Recipient of the Robert H.W. Strang Award in Orthodontics
    1999 Recipient of the Ernest Sheldon Friel Memorial Award
    2013 Recipient of the Brainerd F. Swain Award of Excellence,US
    2018 Honorary member of the American University Beirut Libanon.
    2018 Recipient of the Ketcham Award in Washington by AAO
     
    Abstract:
    Orthodontics started with an E arch to which the teeth were tied to widen the arch enough to accommodate all teeth in the case of crowding. When the bands with brackets were introduced and the orthodontists became “wire benders “. Bending served to: 1) reduce the force level by adding loops, 2) perform first second and third order corrections, 3) generate the necessary force system for the desired displacement.
    The first reason became superfluous when alloys delivering lower forces with the same dimension were developed. The second reason was declared to be superfluous when the prescription brackets were introduced although the different authors did not agree on the same prescription. The third reason is still there and,but countless market driven suggestions to facilitate the orthodontist´s daily work by replacing individual treatment planning and wire bending with application of ready to go products where all the different companies possessed the “truth”.
    With respect to the third reason none of the brackets , whether self-ligating or not, can determine where the arch resulting from sliding mechanics on prebend archwires is ending in the face. Each tooth has 6 degrees of freedom and already connecting two teeth with a piece of wire has 36 possible solution. The forces developed by a straight wire system is unpredictable as it depends on forces from the appliance, from the muscle matrices and in the young population from growth. Introduction of skeletal anchorage seems to take care of anchorage problems and finally clear aligners are marketed as the solution without any effort from the orthodontists. The advertisment is favoring expression as as: treat with less less time; treat predictably; empowering your practice; consistent outcome; intelligent wires. Has the brain and the manuality become superfluous? No but yes; if patients were cases reacting as typodonts, reification is a word used when we talk about cases and not patients. The patients need an occlusion compatible with normal function and this is not applicable to Cases.
     
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  • John Jin-Jong Lin

    Nationality:Taiwan

    Lecture :
    Unravelling the Myth of Myofunctional Therapy and Prefabricated Myofunctional Appliances(MRC,EF Line, Multi-Family, Pre Ortho etc.)

    Lecture language: English

    (The speech recording will be available on-demand for one week.)
    CV or Autobiography :
    M.S and Certificate in Orthodontics, Marquette University (USA) (Orthodontic Graduate Program) 2000~2002: President of the Taiwan Association of Orthodontists 2004~present: Clinical Professor, Taipei Medical University (Orthodontic Department)
     
    Abstract:
    Recently the use of Prefabricated Myofunctional Appliances(PMA) became very popular,it seems the PMA is kind of magical appliance,just put it into the patient's mouth the malocclusions will be miraculously disappear.
    The history and development of the myofunctional therapy and PMA will be reviewed.
    The indications and contra-indications for using the PMA will be discussed.
    What should be prepared before using the PMA will be concluded,so whomever interested in using it will be equipped with plenty of proper knowledge.So both patients and doctors can be benefited the most.
     
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  • Peter H. Buschang

    Nationality:United States

    Lecture :
    Maxillo-mandibular Orthopedics - Why It Is Possible and When It Should Be Performed

    Lecture language: English

    (The speech recording will be available on-demand for one week.)
    CV or Autobiography :
    Education and Professional Experiences:
    Director of Orthodontic Research, Texas A&M College of Dentistry, US
     
    Research Experience: 
    Developed the biological basis of a new approach for treating patients with hyperdivergent retrognathic skeletal dysmorphology
    Established methods to treat and prevent the development of white spot lesions during orthodontic treatment
    Provided a new understanding of the primary and secondary stability of miniscrew implants.    
    Discovered new ways to speed up and slow down orthodontic tooth movements, and refute the notion that tooth movements can be accelerated with minimally invasive approaches.
     
    Awards and Honors: 
    2019 American Association of Orthodontics Lifetime Achievement Award, Los Angeles.
    2019 Edward H. Angle Lecture, Award given by the Edward H. Angle Society.
    2018 The Paul Herren Award, University of Bern, Switzerland.
    2009, Honorary Member of the Edward H. Angle Society of Orthodontics
    2005, Honorary Member of the American Association of Orthodontists

    Abstract:
    Other than maxillary expansion, the orthodontic community has never really believed that it is possible to produce substantial orthopedic changes, especially mandibular changes. It is now possible to produce clinically meaningful changes in both the maxilla and mandible. Bone biology tells us that both jaws will respond in predictable ways to alterations of the biomechanical environment. The response can be controlled by orthodontists who understands how and why the jaws respond as they do. The two most prevalent and important skeletal problems that need to be corrected by orthodontists are hyperdivergent Class IIs and hyperdivergent Class IIIs. Hyperdivergent Class IIs can best be corrected by rotating the mandible forward. For older patients, this can be accomplished by intruding the posterior teeth –both relatively and absolutely - using miniscrew implants (MSIs). Vertical pull chin-cups can produce similar changes when MSIs cannot be used (e.g. younger patients whose permanent teeth have not yet erupted). Hyperdivergent Class IIIs can be successfully treatment with miniplates or miniscrews. Both approaches work by protracting the maxilla and rotating the mandible forward while restricting its forward displacement. These orthopedic treatments can be successfully applied in both the permanent and mixed dentitions. 
     
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  • Johnny JL Liaw

    Nationality:Taiwan

    Lecture :
    Nonsurgical Treatment of the Challenging Borderline Cases

    Lecture language: English

    (The speech recording will be available on-demand for one week.)
    CV or Autobiography :
    Dr. Johnny Joung Lin, Liaw completed his orthodontic training at National
    Taiwan University Hospital in 1994 and received his master degree in Chang Gung University. He is now in private practice since 2002 after 8-year visiting staff in Shin Kong Memorial Hospital. He keeps on part-time teaching at National Taiwan University . He served as the President o f Taiwan Association of Orthodontists during 2013 & 2014, and Chair of Taiwan Board of Orthodontics during 2015 & 2016. His mai n interest is the pursuit of Orthodontic excellence through interdisciplinary treatment and the use of TADs. He speaks nationally and internationally to share the experience and seeks the next level on Orthodontic excellence.

    Abstract
    Orthognathic surgery is the gold standard for severe jaw bone discrepancies and challenging malocclusions beyond the envelope of conventional orthodontic treatment. However, there are still many patients who are reluctant to receive orthognathic surgery even though they are clearly informed. Shall we just let them go or is there anything we can try to maximize the orthodontic potential without surgery? To push the boundary of tooth movement to the extreme, we need to know where the boundaries are and how to achieve the treatment goals. On the contrary, the risk and the limitations should be well informed and dynamic communication with the patients for their perception of the treatment effects is very important to avoid medical disputes. However, the most critical part might be the evaluation of the patients’ attitude and expectation of the orthodontic treatment. The treatment duration might be lengthy and less cost-effective for the orthodontic practice. It is suggested to keep the nonsurgical treatments of the challenging malocclusions below a certain percentage in the clinical patient pool at your comfort level. It is rewarding when patients appreciate the treatment outcomes. What if not? Keep safe!
     
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  • Won Moon

    Nationality:United States

    Lecture :
    The New Age of Orthodontics with Novel Technologies: Overcoming the Limitations and Charting the Unknown Territories…MSE and Aligner Systems

    Lecture language: English

    (The speech recording will be available on-demand for one week.)
    CV or Autobiography :
    Education and Professional Experiences:  
    Founder/Chief Executive Officer, the Moon Principles International Research Institute

    Research Experience:
    3D Image Analysis Utilizing Surface Mapping Functions and Elliptical Fourier’s Descriptors
    MSE Related Studies: Finite Element Model (FEM) Development and Simulation, Orthopedic Corrections, Airway Changes, Digital Workflow, etc.
    Micro-implant (MI) Design study
    Accelerated Tooth Movement
    Aligner System Development and Applications of 3D Printing in Orthodontics(AJODO), “Effects of Piezopuncture on the Rate of Tooth Movement and Bone Remodeling in Maxilla and Mandible of Beagles” 

    Awards and Honors: 
    Most Innovative Faculty of the Year Award, UCLA Alumni Association, Section of Orthodontics, UCLA School of Dentistry (2021)
    Lifetime Achievement and Faculty Dedication/Excellence Award, UCLA Alumni Association, Section of Orthodontics, UCLA School of Dentistry (2019)
    AAOF 2018 Center Award, “Standard Characterization of Clear Orthodontic Aligners”
    The Best Case of the Year Award (2017) by the College of Diplomate, American Board of Orthodontists (CDABO), “The Use of a Micro-implant Assisted Rapid Palatal Expansion (MARPE) Appliance to Orthopedically Correct Transverse Maxillary Deficiency in an Adult Patient”
    (Best Research Paper in 2013), American Journal of Orthodontics & Dentofacial Orthopedics

    Abstract
    The discipline of orthodontics is going through drastic changes with the advent of new concepts and technologies. Among these, the non-surgical maxillary expansion in mature patients and clear aligner treatment have taken the center stages of the clinical interests. Although numerous research data and successful clinical cases were presented in recent years, there are many unanswered questions, shortcomings, and challenges we must overcome as we learn to adapt these novel treatment concepts. The shortcomings associated with the maxillary expansion and the current aligner systems will be discussed in detail, and potential solutions by the use of bone-borne expander and novel aligner systems will be proposed. The Maxillary Skeletal Expander (MSE) has evolved since 2004, and overcoming its shortcomings will be illustrated through a trouble shooting exercise. Despite the continuous improvements with various aligner systems, there exist many limitations of their applications. A novel aligner concepts designed to overcome these shortcomings will be introduced. Lastly, combining these two devices for optimal treatments of difficult cases will be discussed.  
    The world of orthodontics is evolving at a furious speed, and it is easy to lose sight of the biomechanical concepts of orthodontics. This presentation will shed some light into incorporating the common-sense biomechanics and fundamental principles of orthodontics into how we utilize these newly developing treatment modalities. 
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  • Chris Chang

    Nationality:Taiwan

    Lecture :
    Simplified mechanics for aligners in treating complex cases

    Lecture language: English

    (The speech recording will be available on-demand for one week.)
    CV or Autobiography :
    1. Dr. Chris Chang is the founder of Beethoven Orthodontic Center and Newton’s A Inc. in Hsinchu, Taiwan.
    2. He received his PhD in Bone Physiology and Certificate in Orthodontics from Indiana University.
    3. He is a diplomate of the American Board of Orthodontics and an active member of Angle Society-Midwest.
    4. Dr. Chang is the publisher of JDO and has authored and co-authored many orthodontic books, including Orthodontics Vols. 1-6, as well as Words of Wisdom, Jobsology and Trumpology.
    5.He is the inventor of OrthoBoneScrews(OBS®)

    Abstract
    Aligner treatment has seen a tremendous growth in patient acceptance and clinical efficacy in recent years. However, for some complex cases that involve less predicable tooth movement, additional auxiliaries and pre-aligner treatment procedures may become necessary. This lecture will help clinicians determine if a pre-aligner phase of orthodontic treatment is required and how to design key mechanics in this phase to simplify the subsequent aligner treatment.

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  • Isao Saito

    Nationality:Japan

    Lecture :
    Postsurgical Morphological Changes in Complicated Orthognathic Cases and Functional Changes During Swallowing in Skeletal Class III by Focusing on Orofacial Muscle Activities and Tongue Pressure Production

    Lecture language: English
    CV or Autobiography :
    Education and Professional Experiences:
    1. Professor and Chair, Division of Orthodontics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Japan
    2. Executive Director, Japanese Orthodontic Society
     
    Research Experience:
    3-dimensional analysis of orthognathic patients with facial asymmetry
    Tongue pressure production and masticatory functions during swallowing in skeletal Class III patients
    Clinical and basic research on cleft lip and palate 
    Histological changes in PDL during experimental tooth movement

    Awards and Honors:
    Research paper award by the Japanese Orthodontic Society (2019)
    Achievement award by the local orthodontic society (2014)
     
    Abstract
    Over 50 years have passed since Division of Orthodontics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University was established in 1968.  During this period, we, orthodontists, have had the opportunities to correct orthognathic patients as well as orthodontic ones.  Various types of orthognathic cases such as mandibular prognathism, retrognathism or facial asymmetry etc. are treated combined with various orthognathic surgeries.
    At Niigata University Medical and Dental Hospital, approximately 2000 orthognathic patients including complicated cases have been successfully treated in collaboration with experienced oral surgeons.  Most patients with complex dentofacial deformities expect to obtain not only proper occlusion but also balanced facial appearance.  It’s therefore essential for orthodontists to make enough discussion on determination of treatment plan with the oral surgeon and patient, considering post-treatment stability as well.
    On the other hand, objectives of surgical orthodontic treatment include an improvement in orofacial functions such as jaw movement, mastication or swallowing.  Of those, no details of swallowing-related function in orthognathic patients have been reported yet.  Hence, our division has been studying on functional activities during deglutition in orthognathic patients with skeletal Class III focusing on orofacial muscles and/or tongue behaviors.
    In this presentation, I will show morphological changes in several types of complicated orthognathic cases actually treated with bimaxillary surgery or multi-piece Le Fort I osteotomy.  Furthermore, I will introduce swallowing functions in skeletal Class III orthognathic patients by analysis of orofacial muscle activities and tongue pressure production.
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  • Chooryung Judi Chung

    Nationality:Korea (Republic of [South] Korea)

    Lecture :
    Successful Anterior Retractions in the Digital TADs Era

    Lecture language: English

    (The speech recording will be available on-demand for one week.)
    CV or Autobiography :
    Education and Professional Experiences:
    Professor, College of Dentistry of Yonsei University, Seoul, Korea
     
    Research Experience:
    Clinical application of TADs
    Esthetics and smile perception
    Interdisciplinary treatment for adults and elderly patients.
    3D evalaution of orthodontic treatment outcome
    Adult treatment combined with autotrasnplantation
     
    Abstract:
    Orthodontic treatment with multiple teeth extraction is a well-accepted treatment protocol even to the general public. While fully controlling and managing anterior retraction has long been considered one of the most important, but difficult orthodontic mechanics in clinical orthodontics, the recent developments in digital dentistry and the application of temporary anchorage devices (TADs) have dramatically improved diagnosis, customizing techniques and treatment efficiency. However, even with the most ideal diagnosis, cutting-edge appliances with mastered techniques, orthodontists sometimes confront unpredicted individual responses or clinical phenomenon which is not fully explained.
    The aim of this presentation is to discuss physiological, biologic and esthetic limitations that may interfere with treatment outcomes in cases of maximum/absolute retraction and would like to propose clinical fundaments to successful anterior retraction in the digital TADs era.
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  • Wen-Ching Ko

    Nationality:Taiwan

    Lecture :
    The Role of Surgical Orthodontics in Multidisciplinary Dental Treatment

    Lecture language: English

    (The speech recording will be available on-demand for one week.)
    CV or Autobiography :
    1.  Vice-chairman, Dental Department, Chang Gung Memorial Hospital, Linkuo, Taiwan
    2.  Professor, Graduate Institute of Dental and Craniofacial Science, Taoyuan, Taiwan
    3.  Editor-in-Chief, Taiwanese Journal of Orthodontics

    Abstract
    Surgical-orthodontics provides proper alignment of the maxillary and mandibular position, improves oral function, and enhances patient quality of life in patients with dentofacial deformitie. It is the gold standard for treating moderate-to-severe deformities. It has increasing demands for adult patients with complicated dentofacial problems that could not be solved by one single dental specialty alone. The problems might come from dental crowding, tooth decay, reduced periodontal support, tooth migration by old extractions, deep bite and bite collapse due to prolonged tooth missing. The three-dimensional dentofacial deformities and malocclusion could aggravate the complexity of the treatment strategies. Among all the dental specialties, orthodontic treatment might take a longer treatment duration. It is essential to develop a treatment protocol that has an effective working scheme among different dental specialties. Patient’s apprehension and compliance is also a key to success among this team work. The role of the orthodontist could be the hub of the treatment team. The orthodontic plan should be considered prior to other dental specialties and surgery. The overall treatment outcomes could be enhanced by providing harmonize jaw bone relation, establishing functional occlusion and level occlusal curve. The missing dental space and dental extraction could be managed properly either by close, reduce or regain for ultimate functional and esthetic solutions. The well coordination of treatment sequence relies on the apprehension of the working tempo in different dental specialties and oral surgery. The treatment limitations should be predicted in some mutilated dentition with poor dental health. The realistic treatment goal is preservation rather than perfection in adult patients with comprehensive dental problems.
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  • Johnson, Hsin-Chang Cheng

    Nationality:Taiwan

    Lecture :
    The Challenge of Treatments and Smile Changes on Skeletal Class III Malocclusions

    Lecture language: English

    (The speech recording will be available on-demand for one week.)
    CV or Autobiography :
    1. Dean and Professor, College of Oral Medicine, Taipei Medical University
    2. Director, Orthodontic Department, Taipei Medical University Hospital
    3. Immediate Past President, Taiwan Association of Orthodontists

    Abstract
    The correction of skeletal Class III malocclusion often requires a combination of traditional orthodontic treatment and orthognathic surgery to achieve perfect results. However, the teeth compensation generated under the discrepancies between the upper and lower jaws complicate the treatment. Whether it is surgical first or orthodontic first, how to effectively and quickly solve the treatment of teeth decompensation has become a challenge for this type of treatment! This report will mainly present, analyze and discuss the orthodontic first-based treatment modes from three directions including transversal, vertical, and anterior-posterior, while observing the correlation of smile changes. This report also presented the clinical research of 30 completed cases of Skeletal Class III malocclusions that collected from the Orthodontic Department of Taipei Medical University Hospital. After the systematic analysis, the changes and applications of skeletal, dental, soft tissue and smile before and after the above treatment modes will be proved and the affecting factors also be surveyed and discussed in this presentation.
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  • Eddie, Hsiang-Hua Lai

    Nationality:Taiwan

    Lecture :
    Treatment Philosophy of Vertical Dimension Loss

    Lecture language: English

    (The speech recording will be available on-demand for one week.)
    CV or Autobiography :
    1. Head, Division of Orthodontics, Division of Orthodontics and Dentofacial Orthopedics, National Taiwan University Hospital
    2. President, Taiwan Association of Orthodontists
    3. DDS, MS, PhD. School of Dentistry, National Taiwan University
    4. MOrtho, FDSRCS. Royal College of Surgeons of Edinburgh

    Abstract
    Effective and efficient orthodontic management of partially edentulous patients is biomechanically challenging and often requires a thorough treatment plan to predictably achieve the desired tooth movements. Comprehensive orthodontic treatment in adults with several missing teeth requires an interdisciplinary approach to restore the occlusion. Associated with the missing teeth, these patients often have edentulous ridges with reduced buccolingual and vertical dimensions, altered occlusal planes caused by extrusion of unopposed teeth, migration of teeth into adjacent extraction spaces, and associated periodontal defects.
    In patients with several missing teeth, certain types of tooth movement are significantly challenging with conventional mechanics. Overbite reduction, distalization, intrusion of posterior teeth, and retraction of anterior teeth are some movements that require a full complement of teeth in the buccal segments to minimize the side effects. Endosseous dental implants can be used for anchorage in these patients and also to increase or support the increased vertical dimension of the occlusion in adults with deep overbite and to reestablish the esthetics of the smile in the early phases of orthodontic treatment.

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  • Heng-Ming Chang

    Nationality:Taiwan

    Lecture :
    Non-surgical Treatment Strategy in Class III Malocclusion

    Lecture language: Mandarin

    (The speech recording will be available on-demand for one week.)
    CV or Autobiography :
    1. 中華民國齒顎矯正學會理事與學術主委
    2. 秀傳醫療財團法人彰濱秀傳紀念醫院牙科部主任
     
    Abstract
    三類異常咬合的治療,往往是長期抗戰的過程。但如果能了解上下顎骨的生長發育時機及過程中的三度變化,搭配適當的裝置及施力機制,應該能夠幫助患者朝向好的方向發展。
    此次演講,講者將從三級異常咬合於混合齒列期的治療策略切入,再提到如何利用擴弓(rapid palatal expansion)及面罩(facemask)來改善上下顎間關係。於成人階段,微型骨釘輔助上顎擴張術(microimplant-assisted rapid palatal expansion; MARPE)也能大幅改善三級異常咬合治療上的困難度。搭配下頷後下旋轉術(mandible backward rotation technique; MBRT),能夠幫助患者藉由不手術的方式獲得更好的外觀。
    希望藉由這次的演講,能夠幫助醫師更全面地了解三級異常咬合的問題及處置策略,並提供患者更好的治療品質。

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  • Yu-Chuan Tseng

    Nationality:Taiwan

    Lecture :
    The Investigation of Jaw Movemet and the Change of Upper Airway

    Lecture language: Mandarin
    CV or Autobiography :
    School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.
    In 1996 Dr. Tseng got dental degree from School of Dentistry, Kaohsiung Medical University (KMU). In 1998, she received Master degree and specialist training from Department of Orthodontics, Dental clinics, Kaohsiung Medical University Hospital (KMUH). In 2017, she obtained the PhD degree from School of Dentistry, College of Dental Medicine, Kaohsiung Medical University(KMU).
    Dr. Tseng is an associate professor of School of Dentistry, College of Dental Medicine (KMU) and director of Department of orthodontics, Dental clinics (KMUH). She is also an active member of Taiwan Association of Orthodontics and committee member in Taiwan Board of Orthodontists.
    Her major research interest relies on subjects of cephalometric analysis, TADs, soft and hard tissue change after orthognathic surgery and CBCT study.

    Abstract

    With advances in medical care, the pharyngeal airway space of orthodontic patients begins to attract attention. If the structure of a patient's pharyngeal airway is not completely understood before administering orthodontic treatment, the airway space changes that occur during the orthodontic treatment process may easily be overlooked. Investigating the correlation between jaw movement and the related changes of the upper airway is essential. Studies have reported that backward mandibular movement also resulted in the retraction of the tongue, the hyoid bone, and the position of the epiglottis. These movements may narrow the pharyngeal airway space after orthognathic surgery, even giving rise to obstructive sleep apnea. This presentation will discuss the correlation between the mandibular setback and the related changes of the tongue area, pharyngeal area, and pharyngeal airflow velocity.
    The second part will share some cases about the change of upper airway in three skeletal patterns.

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  • Chun-Liang Kuo

    Nationality:Andorra

    Lecture :
    Molars Extraction in Orthodontic Treatment

    Lecture language: Mandarin

    (The speech recording will be available on-demand for one week.)
    CV or Autobiography :
    1. 國防醫學院臨床副教授/南台科技大學助理教授
    2. 奇美醫學中心齒顎矯正科主任

    Abstract
    傳統齒顎矯正治療中若是需要借助拔牙來達到較好的治療效果時,上、下顎第一或第二小臼齒往往是最常見的選擇。而上、下顎大臼齒由於咬合功能上的考量,以及拔除後空間關閉的難度增加! 因此,大臼齒拔牙比較少見於傳統的齒顎矯正治療中。
    本次講題將分享關於嚴重齲齒、後牙阻生齒、後牙錯咬、二級一類過度水平覆蓋(Class II division-I excessive overjet)、骨性三級前牙開咬/反咬(skeletal class III anterior openbite/crossbite)等病症,跳脫傳統治療的思維,藉由拔除上顎或下顎第一大臼齒、第二大臼齒或第三大臼齒來進行齒顎矯正治療,讓原本可能需要假牙膺復、犧牲牙齒數量,或是需要侵入性骨釘植入甚或手術輔助等處置得以免除,亦可達到不錯的治療成果!同時也將探討大臼齒拔牙的考量及其適用的時機。
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  • Chia-Tze Kao

    Nationality:Taiwan

    Lecture :
    The Changes in Early Orthodontic Treatment Trend (Part II)

    Lecture language: Mandarin

    (The speech recording will be available on-demand for one week.)
    CV or Autobiography :
    1. 中華民國齒顎矯正學會第10屆理事長
    2. 中山醫學大學附設醫院齒顎矯正科主任

    摘要
     
    齒顎矯正治療在已開發中國家是一項普遍被接受的處置,加上近年隱形矯正治療、肌功能矯正治療的發展,整個矯正治療系統已經是跨足老、中、青、少年代的治療。台灣這些年,一般牙醫師或是兒童牙醫師在這股洪潮下,紛紛投入到這個領域。
    早期矯正治療概念上不外就是阻斷性矯正或是預防性矯正治療,傳統觀念下,早期矯正就是以頭帽、簡單活動式或2x4矯正或搭配功能性矯正之治療。然而,兒童早期咬合矯正處置,則涉及到兒童之身心行為問題與生長發育問題,治療難度上遠比成人矯正治療來的難以預測與處理。
    本次演講內容為在台灣臨床矯正學會大會演講之第二部分,早期矯正治療之趨勢,主要將介紹早期矯正治療應有之正確概念,了解兒童生長發育修飾的模式、辨別早期矯正治療之時機、學習兒童口腔不良習慣之處置方式與差異,在不同裝置下,如何應用最適合之矯正裝置給患者等。期盼非專科矯正醫師的同儕們,可以提供患者最好品質的治療。


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  • Chin-Yun Pan

    Nationality:Taiwan

    Lecture :
    Clinical consideration of Surgery-First and Surgery-Early in Orthodontic-Ogs combined case.

    Lecture language: Mandarin

    (The speech recording will be available on-demand for one week.)
    CV or Autobiography :
    1. 高雄醫學大學口腔醫學院牙醫學研究所齒顎矯正組碩士
    2. 高雄醫學大學附設中和紀念醫院齒顎矯正科主治醫師

    Abstract
    在矯正治療合併正顎手術的病例中,多數病例會遵循較保守的治療順序在正顎手術前先進行矯正治療再進行正顎手術,術前矯正治療主要目的在於準備齒性差異符合骨性差異以利手術時的顎骨移動以及去除可能的干擾,手術中可以順利達到計畫中的顎骨相對位置及術後的咬合穩定度。正顎手術前矯正治療雖然可以增加手術中咬合的穩定度但是矯正治療時間較長且必須重複進行多次模型確認及側顱X光片模擬手術來確認是否符合正確位置。因為有數位軟體的輔助進行正顎手術前的模擬以增加手術優先和早期手術的手術選擇配合詳細的手術及矯正治療規劃,可以有效率的完成手術後的矯正治療工作並達到良好的治療結果。
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  • Ying Kwei Tseng

    Nationality:Taiwan

    Lecture :
    After 22 Consultations---What is The Choice

    Lecture language: Mandarin

    (The speech recording will be available on-demand for one week.)
    CV or Autobiography :


    Abstract
    When the dental assistant told me: ”Dr. Tseng, you are the 17th orthodontist this patient has consulted”, I was planning to keep the consultation short. However, when I found out that this patient was a highly educated structural engineer, we talked for 30 minutes about mechanics and structure.
     
    One month later, the patient returned and told me that he had consulted another 5 well-known orthodontists in Taipei during my trip to the US. Eventually, he accepted my diagnosis and treatment plan.
     
    This is a complex case study with multiple orthodontic problems:
    (1) Class III Malocclusion with Anterior Crossbite & Mandible Protrusion
    (2) #15, #25 Missing
    (3) #36 Incomplete RCT with Apical Lesion
    (4) #38 Impacted with Severe Caries
    (5) Lower Anterior Crowding with #43 Block Out…..
     
    The chaotic appearance of these teeth confused many orthodontists, resulting in more than10 different treatment options offered by 22 orthodontists.
     
    In this lecture, you will not only learn to make accurate diagnosis, but also gain a better understanding of recognizing clinical differences (Envelope Discrepancy) and its operation. How to solve these dilemmas of anchorage and tooth extraction will be fully presented in this speech.

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  • Chien-Hau Chen

    Nationality:Taiwan

    Lecture :
    The Reality and Virtuality of Molar Distalization in Aligner Treatment.

    Lecture language: Mandarin

    (The speech recording will be available on-demand for one week.)
    CV or Autobiography :



    Abstract
    As we know non-extraction treatment is easier than extraction treatment in aligner treatment. And distalization is most used in non-extraction case.Especially when the perfect clinical check simulation is shown to Doctor and our patients, even we Doctor can not distinguish the myth and fall into the the sweet trap. Lead to to aligner treatment  experience is not as good as expected.
    In this section, I would like to share you all about the reality and virtuality with some cases reviewed from class I, class II, class III. You will know what is the limitation, how to deal with reaction force, bite control and correct most often aligner side effect  posterior open bite. Hope to help you reducing unexpected treatmtment result.
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  • Yeong-Charng Yen

    Nationality:Taiwan

    Lecture :
    Clinical Managements of Incisor Position & Torque Compensation in Treatment of Jaw Discrepancy Patients

    Lecture language: Mandarin

    (The speech recording will be available on-demand for one week.)
    CV or Autobiography :




    Abstract
    The shape and positions of incisors are the primary influence determining mandibular movements. The smile arc, profile smile esthetics, protrusive guidance and posterior occlusion are all influenced by the incisor positions. Orthodontists need to make clinical decisions concerned to incisor torque compensations in management of jaw discrepancy cases by ways of classical biomechanics and miniscrew anchorage managements. For optimal stability, comfort and function, the anterior teeth should be in harmony with the neuromuscular neutral zone, lips, phonetics, centric relations and envelop of function.

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  • Jia-Kuang Liu

    Nationality:Taiwan

    Lecture :
    From metal to ceramic self-ligating brackets

    Lecture language: Mandarin

    (The speech recording will be available on-demand for one week.)
    CV or Autobiography :



    Abstract
    Although self-ligating brackets (SLBs) was first described by Stolzenberg in 1935, it was common used named Speed since 1980. A lot of SLBs have been developed for popular use in recent 20 years. Self-ligating brackets divide into two groups, passive and active types. In general, the advantages of self-ligating brackets were claimed such as low friction, chairtime saving and treatment efficiency etc..
    When comparison of friction of metal brackets among conventional bracket, passive SLB (PSLB) and active SLB (ASLB), conventional bracket had higher friction force than SLBs had. To compare friction between passive and active SLBs for different sizes of wires, friction of ASLBs were more than those of PSLBs for rectangular wire & almost the same for round wire in most previous studies. Interestingly, when comparison of frictional resistance of different PSLBs, lower frictional resistance of those PSLBs due to large bevel of slot was noted in our study, in 2013. A series of clinical cases with different metal SLB treatment will be shown in this presentation.
    Ceramic self-ligating brackets were developed recently for esthetic reason, however, only few comparative studies had been reported about their friction and bond strengths. In 2020, frictional forces with three rotation angulations (0, 5 & 10 degrees) of wires (round & rectangular) among one ceramic conventional bracket (ClarityAdvanced), one metal PSLB (DamonMX), one ceramic ASLB (ClippyC) & 2 ceramic PSLBs (DamonClear2 & GeniusCrystal) were compared in our study. The friction of ClarityAdvanced was higher than those of other SLBs in most conditions except 5 & 10 degree angulation of rectangular wire. In shear bond strength test, DamomClear2 had highest bond strength among these 5 kinds of brackets. Some clinical cases with ceramic SLB treatment will be presented.
    In summary, we should understand SLBs before using them. The advantages of SLBs are reduction of chair time & easy to use. Disadvantage of SLB is less torque control. The ceramic SLBs can provide for esthetic need.

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  • Kelvin Wen-Chung Chang

    Nationality:Taiwan

    Lecture :
    Anterior Open-Bite Correction in Different Types of Malocclusion

    Lecture language: Mandarin

    (The speech recording will be available on-demand for one week.)
    CV or Autobiography :
    Chairman of Education Committee, TAO
    Adjunct clinical instructor, Orthodontic department of NTUH
    Director, Breeze Dental Center

    Abstract
    The first step of treating open bite malocclusion is to determine whether the bite deformity is of dental or skeletal origin. With the assistance of skeletal anchorage devices, some skeletal open bite malocclusions can be treated without surgery. Besides the improvement of the dental problems, some of the Class II facial appearance could be changed via the counterclockwise rotation of the mandible, accompanied by the intrusion of molars.
    To improve the efficacy and efficiency for this clinical difficulty, it is crucial to differentiate where the offending site locates: upper or lower; anterior or posterior. Then a solution of anterior extrusion or posterior intrusion can be delivered properly according to the corresponding dentoalveolar problems. Various types of malocclusion and difficulties will be discussed, then their treatment modalities will be introduced in this lecture.

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  • Sheng-Pin Hsu

    Nationality:Taiwan

    Lecture :
    Work Flow of Interdisciplinary Treatment with Aligners, Computer-aided Surgical Simulation, Digital Smile Design and Dental Implant

    Lecture language: Mandarin

    (The speech recording will be available on-demand for one week.)
    CV or Autobiography :
    1. 長庚醫院顱顏齒顎矯正科助理教授
    2. 美國德州醫學中心 3D 手術模擬臨床研究員

    Abstract

    近年來,數位化及三維影像在牙科及齒顎矯正治療的應用有著越來越普遍的趨勢。在齒顎矯正的領域,以三維影像進行牙齒矯正移動的模擬,同時進一步以隱型牙套/取代傳統矯正器的方式在臨床上執行齒顎矯正的治療,目前是相當的熱門;其可以[預視]矯正的流程與結果,同時減少/避免傳統矯正器的配戴,相當受到矯正患者們的青睞!另一方面,以三維影像進行正顎手術的模擬來訂定手術的計畫與術式已漸漸成為主流,其原因在於相較於傳統以X光片及牙科模型來進行Paper/ Model Surgery的規畫方式,三維影像手術模擬能更完整的呈現解剖結構與骨骼輪廓,再加上可以[預視]手術結果的流程,三維影像手術模擬能訂定出更合適、更理想的手術治療計畫;再進一步透過三維列印的手術導板,讓手術的結果更精確、更貼近我們在三維影像手術模擬中所訂定的計畫結果。而在膺復牙科治療的部分,數位微笑設計與植牙協助醫師訂定適合的治療計畫、讓患者可以[預視]治療的結果、提升醫病之間的溝通,大大提升治療結果的滿意度及減少副作用。如何將這些帶給患者更高品質的治療方式有效地結合,發揮一加一大於二的效果,是本次演講要探討的內容;除了以案例報告的方式來呈現其優點、適應症、臨床操作流程之注意要點外,同時也會以三維影像疊合的方式來提供精確性的評估。

     
     
     

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  • Chen-Jung Chang

    Nationality:Taiwan

    Lecture :
    The Pursuit of Symmetry

    Lecture language: Mandarin

    (The speech recording will be available on-demand for one week.)
    CV or Autobiography :
    1. 國立成功大學醫學院附設醫院口腔醫學部齒顎矯正科主任
    2. 美國加州大學洛杉磯分校UCLA附設醫院齒顎矯正臨床研究員
     
    Abstract

    Symmetry plays an important role in determining the facial attractiveness. However, perfectly bilateral symmetrical face created by computer has been proved less attractive than normal face. Planning correction of facial asymmetry could be difficult to clinicians since the definition of midsagittal plane in 3D skull model is still controversial. The optimal symmetry plane (OSP) is an automated landmark-free median reference plane computed from the paired CT voxel of the facial bone. The mandibular OSP was referred to the OSP of the midfacial bone for its alignment, in which the mandibular misalignment was demonstrated and quantified. By using this concept of plane-to plane analysis, the team of National Cheng Kung University has developed two surgical planning system. The “Mixed reality surgical planning” navigation system and the “OSP virtual planning” system. From 2014 to 2020, 100 orthognathic surgical cases has been performed with this two surgical planning method, the results have been shown to be promising. In this presentation, I am going to discuss the definition, the etiology of the facial asymmetry, how to analysis the facial asymmetry. And how to apply the OSP analysis to facilitate the procedures of pre-surgical orthodontic treatment and final results.



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  • Jiann-Chyou Chang

    Nationality:Taiwan

    Lecture :
    Limitation & Breakthrough of Clear Aligner Treatment In Complex Malocclusion

    Lecture language: Mandarin

    (The speech recording will be available on-demand for one week.)
    CV or Autobiography :
    信義瑞比牙醫診所院長
    中華民國隱形矯正學會前理事長
    Journal of Aligner Orthodontics, 編審委員

    Abstract:
    Clear Aligner was introduced to my daily practice for more than 12 years.  Because they are not clear about the mechanism of this new materials and corresponding tooth movements In the early, the treatment indications were limited only in non-extraction orthodontic patients or a little simple cases.  However, with the advancement of the SmartTrack material, G6 protocol of Invisalign and Temporary Anchorage Device, the treatment feasibility and scope of applications were widely expanded to most of the complex malocclusions when we treat with combination of  local braces and clear aligner.  
     
    Bimaxillary protrusion,mutilated occlusion, openbite, canine impaction,  impacted molar uprighting , midline  deviation with facial asymmetry cases are much tougher in clinics when treating with clear aligner therapy only.  Insufficient torque control in anterior teeth, molar mesial tilting , failed premolar derotation which often lead to unwanted bowing effect or aligner offtrack. 
     
    The way to break the limitations or unwanted effects of Clear Aligner Treatment is to thoroughly understand and apply the pros and cons of different orthodontic appliances and applied hybrid mechanics in clinics.
     
    I will present the rational combination treatment with TADs ,  fixed appliances and Clear aligner in tough orthodontic cases.

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  • Te-Ju Wu

    Nationality:Taiwan

    Lecture :
    The Maxillary Protraction From A to Z

    Lecture language: Mandarin
    CV or Autobiography :



    Abstract
    The mid-face deficiency often raised concerns not only in facial appearance but also the functional demands including occlusion and respiratory circulation. According to the literature, in Asian populations, the prevalence of Class III patients was around 15.69%–16.59%, contradictory to that in Western populations. Therefore, the Asian practitioners would more frequently face the challenges from the patients with mid-face deficiency.  
    Being members of the craniofacial team, we fortunately have chances taking care of various patients troubled from maxillary deficiency. This group of patients ranged from school-aged children to young adults. And there are diversed etiologic factors includiong occlusal interference, environmental influence, hereditary results, the developmental defects and combined effects etc.. Facing the various challenges, it takes different evaluation and preparation efforts to select appropriate treatment modalities. Additionally, the patient’s mental maturity and growth potential would also be taken into consideration during the clinical survey. Therefore, it also require comprehensive discussion with patients and care-providers.
    The maxillary protraction is the common strategy applied for maxillary deficient patients. As the orthodontics evolves, there are more and more tools provided for the maxillary protraction. As an orthodontist, we would be responsible for the acknowledgements of the pros and cons of each modality. In this presentation, we are honored to share the experiences in treating maxillary deficient patients of various conditions. From the lessons using maxillary protraction to help maxillary deficient patients, we have realized that such a treatment could bring profound effects and deserves the continuous attention. In the share, we would like to present the treatment efficacy of different protraction techniques with updated following results. The innovative concept would be introduced with the clinical results. Lastly, the comparison and suggestions among different approaches would also be described.

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  • Ze-Min Li

    Nationality:Taiwan

    Lecture :
    Lecture language: Mandarin
    CV or Autobiography :
    2010   Professor, Institute of Oral Medicine, National Cheng Kung University, Taiwan 
    2012   Vice Dean, College of Medicine, National Cheng Kung University, Taiwan 
    2015   Professor, School of Dentistry, Kaohsiung Medical University, Taiwan 
    2015   Dean, College of Dental Medicine, Kaohsiung Medical University, Taiwan 
    2019   Editor, Journal of the Formosan Medical Association (SCI) 
    2019   Member, Oral Medicine Committee, Ministry of Health and Welfare (MOHW), Taiwan 
     
    Abstract
    臨床上,鎳鈦矯正線長時間於應力狀態使用在口腔環境中,口腔環境的複雜與多變性將改變矯正線性質。本次演講將模擬在臨床條件下:(1)受力條件與pH值下對市售矯正線腐蝕性質與金屬離子釋出影響,(2) 口內溫度的轉變與受力條件對微結構、相變化及機械性質影響。第一部份實驗中循環動電位極化法實驗(Potentiodynamic test)結果顯示三點彎曲(3-pont bending)條件下,鎳鈦矯正線的產生較嚴重的局部腐蝕。浸泡人工唾液實驗中於應力的狀態下鎳離子在第1天就可被偵測到,且隨著浸泡時間增加,鎳離子釋出量有上升趨勢;且在pH 2較pH 5的人工唾液有較高的鎳離子釋出量。第二部份實驗中市售鎳鈦矯正線在三點彎曲(3-pont bending)條件下進行5-55oC熱循環,熱差分析儀(DSC)結果顯示實驗條件將影響到矯正線相變化溫度。X光繞射儀(X-ray Diffractometer)分析結果材料結晶性下降與相組成改變。機械性質測試結果顯示鎳鈦矯正線應力遲滯圈變窄與永久形變產生。本研究指出受力與熱循環測試條件下將影響到鎳鈦矯正線的腐蝕性、鎳離子釋出、相變化溫度、微結構與機械性質。
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