Dept. of Ortho, School of Dentistry, Kyungpook Nati. Univ. Daegu, Korea.
Full time instructor, Dept. of Dentistry, Catholic Univ. Daegu, Korea.
intern & orthodontic residency, affiliated hospital, Kyungpook Nati. Univ.
DDS, School of Dentistry, Kyungpook Nati. Univ.
Dept. of Ortho., School of Dentistry, Kyungpook Nati. Univ. Daegu, Korea.
Visiting assistant professor, Dept. of Ortho., Univ. of Oklahoma, USA.
Dept. of Ortho., Keimyung Univ. Daegu, Korea.
Dean, School of Dentistry, Kyungpook Nati. Univ.
Dept. of Ortho., School of Dentistry, Kyungpook Nati. Univ.
Dept. of Ortho., Faculty of Dentistry, Univ. of British Columbia, Canada.
Visiting professor, Dept. of Ortho., Faculty of Dentistry, Osaka Univ. Japan.
Professor emeritus, Kyungpook Nati. Univ. Daegu, Korea.
President, Korean Association of Orthodontists.
Visiting professor, Univ. of Michigan, USA.
intern & orthodontic residency, affiliated hospital, Kyunghee Univ. Seoul, Korea.
DDS, School of Dentistry, Seoul Nati. Univ. Seoul, Korea.