Contemporary Multiloop Edgewise Archwire (MEAW) Technique: Old-fashioned but Useful

Feb 8, 2020 10:30am ‐ Feb 8, 2020 11:15am

In 1967, Young H. Kim created the multiloop edgewise archwire (MEAW) to treat open bite malocclusions, which he achieved with great efficiency. Subsequently, Prof. Young-il Chang (Seoul National University, Seoul, Korea) studied the MEAW mechanics to establish the principles. Young H. Kim applied it to all types of malocclusions. MEAW can be constructed with stainless steel 0.016 × 0.022 (bracket 0.018 inch slot) or 018 x 0.022 or 0.017 × 0.025 ss (bracket 0.022 inch slot). The MEAW requires wire bending, which seems very old-fashioned, but it is still very useful in many cases. This lecture will present both old and contemporary cases allowing the audience to easily understand the MEAW techniques.

Buccal Shelf (BS) Screws for Class III Openbite Correction

Feb 8, 2020 11:15am ‐ Feb 8, 2020 12:00pm

Common anterior open bite corrections include extractions and a variety of appliances, such as, high-pull headgear, bite blocks, and elastics. In more severe cases, orthognathic surgery is required to correct the skeletal malocclusion. While surgery proves to be a reliable treatment option, many patients reject it for the prohibitive cost, pain and long recovery time. Recently, TADs have allowed orthodontists to treat some of these patients without orthognathic surgery through intrusion of the posterior mandibular molars and rotate the occlusal plane. They provide a treatment alternative for mild-to-moderate open bite cases without other skeletal contributing factors. This lecture will demonstrate how to properly identify and eliminate the etiology of anterior open bite and create effective strategies to correct it with buccal shelf (BS) TADs and extractions. After this lecture, you’ll be able to apply BS screws in your daily practice.

Long-term Stability of Openbite Correction

Feb 8, 2020 11:15am ‐ Feb 8, 2020 11:45am

Treatment for anterior openbite malocclusion is notorious for being difficult and having high rates of relapse. Many appliances and treatment techniques are available to assist the practitioner in closing an openbite, but reports often lack information on the long-term success of any given treatment. This talk will present a summary of stability reports from across the orthodontic literature, giving clinicians insight into what to expect from the treatments they render.

Orthodontic Treatment Combined with Maxillary Surgery for Correction of Open Bite

Feb 8, 2020 1:45pm ‐ Feb 8, 2020 2:30pm

**Audio Only

In 1932 Martin Wassmud introduced the concept of LeFort I osteotomy and since that time it has become the “workhorse” in conjunction with orthodontic treatment for the resolution of malocclusions, especially open bite. There are many technical nuances associated with the orthodontic preparation that will be discussed as well when the surgery is combined with coordinated orthodontic care, the long-term outcomes can be favorable. Appropriate diagnosis and patient selection are the keys to success as well as close interdisciplinary working relationships between surgeons and orthodontists.

A Case for Considering the Mandibular Sagittal Osteotomy in Treating Anterior Openbite

Feb 8, 2020 3:00pm ‐ Feb 8, 2020 3:45pm

The use of the mandibular sagittal split osteotomy for the correction of anterior open bite is still relatively rare. This bias is generally based on historical experience of treating open bite in the era of using wire osseous fixation and the belief that posterior facial height can not be increased. The stability of using rigid internal screw fixation and bilateral sagittal osteotomies in counterclockwise rotation of the mandibular body now has been demonstrated. Indications for considering a mandibular osteotomy in the correction of anterior open bite will be reviewed.

Anterior Openbite Correction: Surgery vs. TADs

Feb 8, 2020 3:45pm ‐ Feb 8, 2020 4:15pm

Anterior open bite (AOB) can be corrected by orthognathic surgery or orthodontic treatment. Severe skeletal, facial, and functional problems should be corrected by orthognathic surgery, but combining cone-beam computed tomography (CBCT) and temporary anchorage devices (TADs) can provide an efficient and accurate way to correct AOB. Nowadays, by using TADs, we can expand orthodontic boundaries. In this lecture, various clinical applications of TADs and orthognathic surgery will be discussed in challenging AOB cases along with new American Board of Orthodontics (ABO) Scenario-based Oral Clinical Examination domains. After the lecture, clinicians will be able to treat and finish anterior open bite cases more efficiently and successfully while minimizing the chance of relapse.

Q&A Discussion

Feb 8, 2020 4:15pm ‐ Feb 8, 2020 4:45pm

Q&A Panel Discussion: All Saturday Speakers

Anterior Open Bites in Adults: Treatment Success, Satisfaction, and Stability

Feb 9, 2020 8:30am ‐ Feb 9, 2020 9:15am

**Audio Only

Dr. Huang will present findings from the National Adult Anterior Open Bite Study, which was conducted in the NDPBRN setting. The study enrolled more than 90 practitioners and 347 patients from across the United States. Dr. Huang will describe the success rates associated with 4 major categories of treatment - aligners, fixed appliances, TADs, and orthognathic surgery. He will also discuss practitioner and patient factors related to satisfaction and stability. Finally, he will review the mechanism by which open bites were corrected using the 4 treatment categories, based on cephalometric analyses.

Solving the Mystery of the Anterior Open Bite in Adults

Feb 9, 2020 9:15am ‐ Feb 9, 2020 10:00am

Adult anterior open bites are a particularly difficult diagnostic and treatment scenario that will be explored in this presentation. Evaluating, establishing and maintaining an orthopedically stable occlusion is a foundation piece for the orthodontic practitioner. The interaction of muscles, teeth, jaws and TMJs will be explored with the use of imaging. Key anatomic variables that negatively influence occlusion will be singled out and discussed in this presentation.

Silver-Bullet Breakthrough? Mandibular Autorotation Concept (MAC) Surgery: Rationales and Outcomes

Feb 9, 2020 10:30am ‐ Feb 9, 2020 11:15am

Osteoarthritis of the temporomandibular joint causes marked retrusion of the mandible and open bite. To date, several surgical orthodontic treatment modalities have been performed, but prognosis and postoperative stability are poor, because of relapse and condylar resorption. Mandibular autorotation concept (MAC) surgery performed at our hospital is a broad term to describe the series of orthognathic surgery utilizing an intentional mandibular autorotation. In this presentation, I would like to share with you the backgrounds and effectiveness of the MAC surgery with the basic and clinical data.