Biography of the speaker
Hyo-Sang Park, Kyungpook National University, Daegu, Korea
Name, profession: Park, Hyo-Sang DDS, MSD, PhD.
Professor and Chair, Department of Orthodontics.
School of Dentistry, Kyungpook National University, Daegu, Korea
Director at Orthodontic Research Center, Kyungpook National University Hospital
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 18 years and owned ten patents and wrote more than 70 international articles, seven 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 120 times. He is director of Orthodontic Research Center in Kyungpook University Hospital which performs research on Microimplants. He is serving as reviewer AJODO, Angle Orthod, EJO, J of Orthodontics, KJO, and other journals.
He is doing reseaches concerning clinical use of microimplants, its biomechanics, and animal experiments to improve Microimplants.
Theses of a performance
The Changes of soft tissue profile by vertical control in versus anterior teeth retraction
Professor, Dept. of Orthodontics, School of Dentistry, Kyungpook National University.
Soft tissue changes in hyperdivergent patients are largely dependent on retraction of anterior teeth and vertical control, in other words, intrusion of the teeth. The critical point for facial profile changes is related to disappearance of hypermentalis muscle, which is normally evident on skeletal Class II hyperdivergent patients. The retraction of the anterior teeth and vertical control can reduce the length of distance from basal maxilla through incisal tip of the upper incisors, to the chin. The soft tissue length is not changed much with these movements, and hypermentalis muscle activity can be disappeared.
In conventional orthodontic treatment, the retraction of anterior teeth was emphasized to improve facial profile. However occasionally profile improvement was not sufficient even after large retraction of the anterior teeth. The vertical control seems to be more important to improve facial profile than incisor retraction.
Speaker would like to explain how to maximize the profile improvement in hyperdivergent patients and to emphasize the importance of soft tissue dimension on facial esthetic improvement.