• 3-14.10.2006 8th Congress of Inspiration,Munich,Germany, Case presentation of Spinal Instrumentation for Osteoporotic Compression Fracture
• 8 Oct.2005 Joint Congress of The 8th annual Meeting of Korean Musculoskeletal Laser and Radiofequency Society(KOMULARS) & The 5th spine Total Care(STC),Seoul, Korea “Minimally Invasive Spinal Surgery in the Elderly”
• 10.4.2004. Taiwan Spine Society, Taipei, Taiwan “Surgical Management of Osteoporotic Vertebral Compression Fracture in Elderly”
• 16.12.2003 11th Asia Pacific Orthopedic Society, 8th Spine course, Hochiminh city, Vietnum“Spinal Instrumentation for Kyphotic Deformities in Elderly Indications and Operative Technique”
• 2002.1.31-2.1 6th International ARGOS Symposium, Paris , France “Lateral placement of a single cylindrical threaded cage in 360 degrees lumbar interbody fusion for lumbar degenerative disorders"
• 2001.1.25-27 5th International Argos Symposium, Paris , France “High thoracic subdural lymphoma complicated in dorsolumbar burst fracture
• 2000.8.29 World Spine I, Berlin, Germany “Low Back Pain After 360 Degrees Lumbar Fusion Using Pedicle Screwing And Titanium Cages”
• 2000.1.26-2.6 4th International Argos Symposium, Paris, France “Low Back Pain after 360 Degrees Lumbar Fusion Using Pedicle Screwing and Titanium Cages”
• 1999.6.22-24 5th International Congress on Spine Surgery, Istanbul, Turkey “Surgical Technique of Reduction and Fixation of Lumbar Spondylolisthesis”