The 53rd Annual Scientific Congress of the Korean Association of Orthodontists PASSION FOR A LONG JOURNEY :
Nature vs Nurture

November 5(Thu) - 6(Fri), 2020
Precongress: November 1(Sun) / VOD: November 7(Sat) - 8(Sun)

Special Lectures

Long term stability of microimplant orthodontic treatment
Dr. Hyo-Sang Park
  • Professor and chair, Department of Orthodontics.
  • School of Dentistry, Kyungpook National University, Daegu, Korea
  • His research background was immunhistochemical studies for neurotransmitter following tooth movement and growth studies using rats as experimental animal. he published numerous papers. He did pioneer works and extensive researches on development of microimplants since 1998. He is using microimplants for 21 years and owned ten patents and wrote more than 100 international articles, six text books, and seven chapters dealing with Orthodontic Microimplants. He found Dentos Limited with collaboration with colleagues. He has spoken world renowned orthodontic meetings more than 70 times as keynote speaker and provided 2 or 3 days microimplants training course internationally more than 300 times.
    He is doing reseaches concerning clinical use of microimplants, its biomechanics, and animal experiments to improve Microimplants.

It has been more than two decades to accept the microimplant as routine anchorage device. There have been many studies on developing skeletal anchorage itself and various treatment mechanics for each entity of malocclusion. It brought about tremendous paradigm shifts on many fields in orthodontic treatment.

Relapse was one of the most frustrating sequela in orthodontic treatment and it has been accepted that certain amount of relapse is inevitable and occasionally is considered as normal aging process in terms of long term basis. In conventional orthodontic treatment, it has been already well known that which malocclusion has more relapse than others. Microimplant treatment, however, is comparatively new treatment and has not been fully assessed for stabililty of the treatment even though there were many studies.

Basically the microimplant orthodontic treatment is not totally different treatment as compared to conventional orthodontic treatment. It means that there might be no big differences in relapse of microimplant orthodontic treatment. However after the use of microimplants in orthodontic treatment, some movement which was not possible with conventional Tx. was performed routinely and the extent of movement is much bigger in microimplant treatment. There was not enough information on relapse related to these differences.

Therefore speaker would like to discuss the differences in relapse between conventional and microimplant orthodontic treatment with focusing on the intrusion of molars and big retraction of the upper anterior teeth. Also would like to discuss etiology oriented understanding of relapse which was obtained from long-term close observation of orthodontic-surgery borderline cases.