UCLA Orthodontics

Lecture ^
Course Fee: $480

Early Registration: $432

CDE Credits: 6
May 3, 2019

Friday 8:30am-4:00pm


Workshop ^
Course Fee: $380

Early Registration: $342

CDE Credits: 2
May 3, 2019

Friday 4:30-6:30pm

^ Enrollment in lecture required to attend workshop

Limited enrollment

Downtown Los Angeles - location to be determined


The Moon Principles by Won

Advanced Maxillary Skeletal Expander (MSE) Seminar with Retrospective Overview, the Latest Developments, and Prospective Advanced Applications

Lecture and optional Workshop


Won Moon, DMD, MS   

Thomas R. Bales Endowed Chair in Orthodontics, Program Director Orthodontics residency program, Associate Professor UCLA School of Dentistry and Diplomate of the American Board of Orthodontics






The MSE has evolved since 2004, and its application has been steadily growing globally. With a proliferation of MSE related publications by multiple authors (twenty of them were authored by Won Moon), there is clear evidence to support its impact.

The dental and skeletal effects of maxillary expansion using the conventional rapid palatal expander (RPE), the surgically-assisted rapid palatal expander (SARPE), and the micro-implant assisted maxillary skeletal expander (MSE) will be illustrated. Dental expansion, bone bending, and true skeletal expansion will be compared. The adverse clinical consequences of RPE and SARPE in high-angle cases will be explored, and a new approach eliminating these problems by the use of MSE will be presented, based on research data. Clinical cases involving non-surgical midfacial expansion in both adolescent and adult patients will be examined in detail. Through these clinical examples, a proper MSE fabrication and expansion protocols will be illustrated.

Secondly, other advantages of utilizing MSE will be demonstrated. Many patients requiring maxillary expansion often have narrow nasal airways, and positive changes in nasal airway with application of MSE are common. Clinical cases and research findings illustrating the profound enlargement of nasal airways and functional improvements after MSE in both adolescent and adult patients will be closely evaluated.

With this concept of orthopedic expansion, MSE can also aid in orthopedic correction of Class III cases when combined with a face-mask (FM). Clinical cases combining MSE and FM in both growing and mature patients will be discussed, and orthopedic effects will be illustrated.

Lastly, unknown skeletal impacts will be further explored. Changes in the facial dimension and surrounding structure will be demonstrated through clinical cases. The latest findings from the UCLA research team will be presented in order to enhance depth of understanding in impact of MSE.

This course will cover a comprehensive overview of current usage of MSE and will also provide more thought-provoking possibilities for those who are seeking more advanced applications of MSE.

 Lecture Learning Objectives
  • Understanding the differences in expansion by RPE, SARPE, MARPE and MSE
  • Differences between various designs of micro-implant assisted rapid palatal expanders (MARPE), and MSE (a particular type of MARPE).
  • How to produce parallel expansion of maxilla in occlusal and frontal planes with MSE
  • Nonsurgical orthopedic expansion in adults with MSE
  • Orthopedic expansion in high angle cases with MSE
  • Orthopedic protraction in Class III cases with MSE and FM
  • Management of high-angle Class III cases with MSE and FM
  • Improving an obstructive nasal airway with MSE
  • Proper fabrication of MSE
  • Expansion protocols based on skeletal maturity and biotype
  • Other skeletal impacts associated with MSE
  • Contraindications
  • Overcoming difficult cases
  • New and improved MSE
  • Future direction in utilization of MSE
  • Troubleshooting
Hands-on Workshop Overview
  • Overview of MSE fabrication and clinical tips through case studies
  • PowerPoint Presentation of Materials and Methods for the workshop
  • Proper placement of MSE on the typodont made with synthetic bone
  • Contouring the supporting arms
  • Inserting Micro-Implants into the synthetic bone using both the mini-hand-driver and Ratchet Wrench
  • MSE Activation
  • Removing Micro-Implants with the min-hand-driver

speakers/instructors and topics are subject to change without prior notice