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135. C1-2 Fusion. AOSpine Advanced Level Specimen Course-Advanced Techniques of Cervical and Thoracolumbar Spine. Seoul, Korea. May 11-12, 2019.
134. C1-C2 reduction technique. APSS-APPOS 2019. Incheon, Korea. April 4-6, 2019.
133. Posterior surgery for the occiput-cervical spine: Practical Workshop, AOSpine Advanced Level Regional Anatomical Specimen Course. Chiang Mai, Thailand. August 19-20, 2018.
132. Posterior instrumentation for middle cervical spine (placement of lateral mass screw, laminar screw, pedicle screw). AOSpine Advanced Level Regional Anatomical Specimen Course. Chiang Mai, Thailand. August 19-20, 2018.
131. Techniques in posterior C1-C2 Fixation, Decompression and Fusion. CAOS-CSRS Congress 2018. Shanghai, China. June 22-24, 2018.
130. Surgical pearls and tips for the management of high cervical spine region. Global Spine Congress 2018. Singapore. May 2-5, 2018.
129. Decompression technique during posterior C1-2 stabilization. 2018 Shanghai Renji International Cervical Spine Forum on State-of-the-art Surgical Decompression and Stabilization. Shanghai, China. April 27-29, 2018.
128. Decompression technique during posterior C1-C2 stabilization. The 9th Annual Meeting of Cervical Spine Research Society - Asia Pacific Section. New Delhi, India. March 22-24, 2018.
127. New technique: Uncovertebral joint fusion during ACDF. The 34th Fall Congress Korean Society of Spine Surgery. Seoul, Korea. November 17, 2017.
126. Upper cervical lesion. 2017 Instructional Course Lectures, Korean Society of Spine Surgery. Seoul, Korea. October 28, 2017.
125. Vertebral artery injury in cervical spine surgery: Strategies in management. Instructional Course in Spine. Trivandrum, India. August 11-13, 2017.
124. Distraction arthrodesis of C1-C2 in intractable occipital neuralgia. Instructional Course in Spine. Trivandrum, India. August 11-13, 2017.
123. How to manage VA injury during surgery. AOSpine Advanced Course. Seoul, Korea. May 13-14, 2017.
122. Video: How do I do the reduction. Global Spine Congress 2017, Milan, Italy. May 3-6, 2017.
121. Technique of reduction and decompression in C1-2 fixation. Global Spine Congress 2017. Milan, Italy. May 3-6, 2017.
120. Posterior instrumentation (incuding high cervical fusion technique). 2017 Cervical Spine Research Committee Cadaver Workshop, Korean Society of Spine Surgery. Seoul, Korea. April 7-8, 2017.
119. C1-2 instability. 2017 Seoul National University Orthopaedic Update (I): SPINE. Seoul, Korea. February 19, 2017.
118. Diagnostic values of diagnostic selective nerve root block (DSNRB). Joint Symposium of The Korean Association of Orthopedic Surgeons and Korean Society of Spine Surgery. Seoul, Korea. January 15, 2017.
117. Upper cervical lesion. 2016 Instructional Course Lectures, Korean Society of Spine Surgery. Seoul, Korea. October 29, 2016.
116. High cervical lesions. Instructional Course Lectures of the 60th Annual Fall Congress of the Korean Orthopaedic Association. Incheon, Korea. October 19-22, 2016.
115. Cervical myelopathy vs. radiculopathy: surgical vs. nonsurgical treatment. The 1th International Congress on Spinal Pain. Gwangju, Korea. May 26-29, 2016.
114. Vertebral Artery Injuries: The XVIIIth Cervical Spine Research Society - European Section Cadaveric Instructional Course. Barcelona, Spain. March 31- April 01, 2016.
113. Reconstruction for cervical laminectomy defect. Nepal Orthopaedic Association. Pokhara, Nepal. February 11-13, 2016.
112. Management of upper cervical spine deformities. The 32nd Fall Congress Korean Society of Spine Surgery. Seoul, Korea. November 20, 2015.
111. Anterior cervical plating. The 32nd Fall Congress Korean Society of Spine Surgery. Seoul, Korea. November 20, 2015.
110. C1-2 fixation in rheumatoid arthritis. AOSpine Advanced Video Symposium. Seoul, Korea. November 7, 2015.
109. OC fusion: Posterior Cadaveric Workshop, The 8th Advanced Cervical Spine Course. Advanced Surgical Training Centre, National University Hospital, Singapore. October 31- November 01, 2015.
108. C1-C2 screw: Posterior Cadaveric Workshop, The 8th Advanced Cervical Spine Course. Advanced Surgical Training Centre, National University Hospital, Singapore. October 31- November 01, 2015.
107. Multiple screw rods fixation. The 8th Advanced Cervical Spine Course. Advanced Surgical Training Centre, National University Hospital, Singapore. October 31- November 01, 2015.
106. Distraction arthrodesis of C2 facet joints. The 8th Advanced Cervical Spine Course. Advanced Surgical Training Centre, National University Hospital, Singapore. October 31- November 01, 2015.
105. Reconstruction for the laminar defect. The 8th Advanced Cervical Spine Course. Advanced Surgical Training Centre, National University Hospital, Singapore. October 31- November 01, 2015.
104. Anterior plating technique. The 8th Advanced Cervical Spine Course. Advanced Surgical Training Centre, National University Hospital, Singapore. October 31- November 01, 2015.
103. Vertebral artery anatomy & injury. The 8th Advanced Cervical Spine Course. Advanced Surgical Training Centre, National University Hospital, Singapore. October 31- November 01, 2015.
102. Posterior column reconstruction for laminectomy defect. Spine Summit Asia Pacific - Hong Kong. September 25-27, 2015.
101. Distraction arthrodesis of the Atlantoaxial facet joint for the treatment of occipital neuralgia caused by C2 nerve rootcompression. Spine Summit Asia Pacific - Hong Kong. September 25-27, 2015.
100. Computer-assisted spine surgery(CASS). CAOS-KOREA. Seoul, Korea. September 18, 2015.
99. Multiple screw placement for C2 fixation. The 15th Interim Meeting of the World Federation of Neurosurgical Societies. Rome, Italy. September 8-12, 2015.
98. Distraction arthrodesis of the C1-C2 facet joint with preservation of the C2 nerve root for the management of intractable occipital neuralgia caused by C2 root compression. The 31st Annual Meeting of Cervical Spine Research Society - European Section. London, UK. May 27-28, 2015.
97. Reconstruction for laminectomy defect. The 6th Annual Meeting of Cervical Spine Research Society - Asia Pacific Section. Yokohama, Japan. March 27-28, 2015.
96. Reconstruction of posterior laminar defects. Instructional Course Lectures. The 42th Annual Meeting of Cervical Spine Research Society. Orlando, U.S.A. December 3-6, 2014.
95. Upper cervical lesion. 2014 Instructional Course Lectures, Korean Society of Spine Surgery. Seoul, Korea. October 25, 2014.
94. Posterior cervical reconstruction. AOSpine Advances Cadaver Course. Seoul, Korea. September 20-21, 2014.
93. Posterior cervical fixation C0-C2: Clinical experience, a hands-on cadaveric course. Seoul, Korea. August 22-23, 2014.
92. Pseudarthrosis following spinal arthrodesis - Introduction. The 31st Spring Congress Korean Society of Spine Surgery. Incheon, Korea. May 22-24, 2014.
91. Anterior cervical discectomy and fusion, Expanding and refining your range of skills on spine surgery: a hands-on cadaveric course. Suwon, Korea. February 21-22, 2014.
90. High cervical fusion: reduction technique. Seoul St. Mary's Hospital Spine Center Symposium. Seoul, Korea. January 10, 2014.
89. Surgical treatment of intractable occipital neuralgia caused by C2 root compression. The 30th Fall Congress Korean Society of Spine Surgery. Seoul, Korea. November 22, 2013.
88. Vertebral artery injury: Causes and prevention. The 8th International Congress of Chinese Orthopaedic Association. Beijing, China. November 7-10, 2013.
87. C1-2 posterior fixation_C1 posterior arch-C2 pedicle screw fixation. AOSpine Advances Video Seminar for surgical tips in spinal surgery. Seoul, Korea. November 2, 2013.
86. Occipito-cervical fusion: pearls & pitfalls. AOSpine Advances Symposium in Vertebral Tumor & Inflammatory Spinal Disorder Management, Hong Kong. October 12-13, 2013.
85. Atlanto-axial fusion: pearls & pitfalls. AOSpine Advances Symposium in Vertebral Tumor & Inflammatory Spinal Disorder Management, Hong Kong. October 12-13, 2013.
84. Occipital-C1-C2 instrumentation& reduction: Clinical experience, a hands-on cadaveric course. Seoul, Korea. June 28-29, 2013.
83. Posterior stabilization for high cervical instability. AOSpine Advances Cadaver Course. Seoul, Korea. June 15-16, 2013.
82. Surgical treatment of occipital neuralgia caused by C2 nerve root compression. The 86th Annual Meeting of th Japanese Orthopaedic Association. Hiroshima, Japan. May 23-26, 2013.
81. Surgical treatment of intractable occipital neuralgia caused by C2 nerve root compression. Global Spine Congress 2013, Hong Kong. April 4-6, 2013.
80. Posterior cervical fixation C0-C2: Surgical techniques and pitfalls. Expending and refining your range of skills on spine surgery, a hands-on cadaveric course. Suwon, Korea. March 9-10, 2013.
79. Revision for failed CVJ surgery. The Catholic university spine symposium. Seoul, Korea. December 1, 2012.
78. Reconstruction for laminectomy defects. The 29th Fall Congress of Korean Society of Spine Surgery. Seoul, Korea. November 23, 2012.
77. C1-2 fixation. AOSpine Advances Video Seminar in Surgical Technique. Seoul, Korea. November 3, 2012.
76. Retrovertebral osteophyte and uncinate resection. 2012 Kyung Hee Spine Update (KHSU). Seoul, Korea. November 2, 2012.
75. Computer Assisted Surgery (CAS) application in spine surgery. Instructional Course Lectures, The 56th Annual Fall Congress of Korean Orthopaedic Association. Seoul, Korea. October 18, 2012.
74. Vertebral artery injury during C1-C2 surgery: prevention and personal experience. The 16th Hokkaido University Spinal Reconstruction Seminar. Sapporo, Japan. 2012. 6. 28-29.
73. Surgical treatment of occipital neuralgia caused by C2 nerve root compression. The 16th Hokkaido University Spinal Reconstruction Seminar. Sapporo, Japan. 2012. 6. 28-29.
72. Posterior cervical fixation C0-C2: Surgical techniques and pitfalls. Expending and refining your range of skills on spine surgery, a hands-on cadaveric course. Seoul, Korea. 2012. 3. 9-10.
71. Posterior cervical fixation: C0-C2. Fundamentals in spine surgery. Inje University Busan Paik Hospital. Busan, Korea. February 4, 2012.
70. Reconstruction of the high cervical and occipocervical areas. The 17th annual meeting of the Spine Society of HCMC, Viet Nam (SSHV 17) combined with the Operative Spine Course and AOSpine Advances Seminar, Sai Gon-HCM City, Viet Nam. December 2-8, 2011.
69. Laminoplasty and fusion: surgical technique. The 28th Fall Congress of Korean Society of Spine Surgery. Seoul, Korea. November 25, 2011.
68. Upper cervical lesion. 2011 Lecture, held by Korean Society of Spine Surgery. Seoul, Korea. Oct. 29, 2011.
67. Vertebral artery injury: prevention and personal experience. The 34th Annual Scientific Meeting of Singapore Orthopaedic Association, Singapore. October 13-14, 2011.
66. Current surgical techniques of occipito-cervical and high cervical areas. The 34th Annual Scientific Meeting of Singapore Orthopaedic Association, Singapore. October 13-14, 2011.
65. Segmental screw fixation in C1-C2 area. Advanced Cervical Spine Techniques Workshop 2011. Advanced Surgical Training Centre, Singapore National University Hospital, Singapore, October 9-10, 2011.
64. Vertebral artery: anatomy and injury. Advanced Cervical Spine Techniques Workshop 2011. Advanced Surgical Training Centre, Singapore National University Hospital, Singapore, October 9-10, 2011.
63. Avoiding complications in high cervical spine surgery. Hanyang university spine symposium. Seoul, Korea. September 24, 2011.
62. Segmental screw fixation of O-C1 and C1-2 joints. Advances in spine surgery: a hands-on cadaveric course. Seoul, Korea. August 27-28, 2011.
61. Cooperative development of surgical simulation software and application in real surgery. Combined meeting of medical image processing societies. Seoul, Korea. July 2, 2011.
60. Cervical myelopathy. Instructional course of lectures for orthopaedic practitioners, held by Korean Orthopaedic Association. Seoul, Korea. June 26, 2011.
59. Advanced surgical techniques in the upper cervical & occipito-cervical areas. Symposium for the 30th anniversary of department of orthopaedic surgery, Seoul Medical Center. Seoul, Korea. March 21, 2011.
58. Diagnostic pitfalls and clues in foraminal stenosis. The 7th Soonchunhyang university spine symposium. Seoul, Korea. March 18, 2011.
57. Segmental screw fixation of O-C1 and C1-2 joints. The 3rd annual course on: Expanding and refining your range of skills on spine surgery, a hands-on cadaveric course. Seoul, Korea. February 26-27, 2011.
56. What are the advantages and pitfalls of laminoplasty for CSM? Seoul St. Mary's Hospital Spine Center Symposium. Seoul, Korea. February 25, 2011.
55. MD experience & perspectives about CAOS development. Seoul Asan Hospital Robot symposium. Seoul, Korea. February 11~12, 2011.
54. C1-C2 posterior screw fixation. The 27th Autumn Congress of Korean Society of Spine Surgery. Seoul, Korea. November 26, 2010.
53. Instrumentaiton of the upper cervical spine with biomechanical considerations. Symposium for the 10th anniversary of Yeungnam University Hospital Spine Center. Daegu, Korea. November 20, 2010.
52. Surgery for cervical myeloradiculopathy: AP combined surgery. 2010 Kyung Hee Spine Update Symposium. Seoul, Korea. November 12, 2010.
51. Cervical microscopy. Bumin Hospital 25th Anniversary Spine/Joint Symposium. Busan, Korea. October 23, 2010.
50. Surgical management of high cervical and occipital lesions. The 2nd international workshop on minimally invasive spinal surgery and a hands-on cadaver dissection. Tahicung, Taipei. October 8-9, 2010.
49. Reconstruction of the occipitocervical junction. Premeeting Course of the 45th Annual Meeting of SRS (Scoliosis Research Society). Kyoto, Japan. September 21-24, 2010.
48. Presurgical simulation for spine surgery. CAOS-KOREA. Seoul, Korea. September 10, 2010.
47. Salvage techniques of C2 fixation for HRVA. Symposium on the occipito-cervical junction surgery. Seoul, Korea. September 8, 2010.
46. ACDF with cage and plate construct. The 1st Chonbuk National University Hospital Cervical Spine Symposium. Chonju, Korea. September 4, 2010.
45. Posterior O-C1-C2 fixation. Advances in spine surgery: a hands-on cadaveric course. Seoul, Korea. August 28-29, 2010.
44. Reconstruction of high cervical and occipital area. The 2nd Eulji Spine Symposium. Daejeon, Korea. Aug 27, 2010.
43. Surgical treatment of high cervical lesions. The 1st Haeundae Spine Conference. Busan, Korea. June 19, 2010.
42. Archival of clinical data files, radiologic images and video files in computures. The 27th Spring Congress of Korean Society of Spine Surgery. Muju, Korea. May. 28-29, 2010.
41. Surgical treatment for upper cervical lesions. The 1st annual meeting of CSRS. Kobe, Japan. April 25, 2010.
40. C1-2 instability. The 16th scientific meeting of the Korean Association for Study of Spinal Pain. Seoul, Korea. April 18, 2010.
39. Far lateral disc herniation. The 6th Soonchunhyang university spine symposium. Seoul, Korea. March 19, 2010.
38. Posterior fixation techniques: C3-C7. Expanding and refinding your range of skills on spine surgery, a hands-on cadaveric course. Seoul, Korea. February 20-21, 2010.
37. C0-C1-C2 fusion. 2009 Kyung Hee Spine Update, combined with cervical research committee meeting of Korean society of spine surgery. Seoul, Korea. November 6, 2009.
36. Diagnosis and treatment of upper cervical spine disorders. 2009 Instructional Course Lecture. Korean Society of Spine Surgery. Seoul, Korea. October 31, 2009.
35. C1 Lateral mass screw. Advanced Cervical Spine Course 2009, Singapore. October 25-27, 2009.
34. C2 screw. Advanced Cervical Spine Course 2009, Singapore. October 25-27, 2009.
33. Cervical pedicle screw. Advanced Cervical Spine Course 2009, Singapore. October 25-27, 2009.
32. Posterior fixation techniques of C0-C1-C2. Advances in spine surgery, a hands-on cadaveric course. Seoul, Korea. August 22-23, 2009.
31. C1-2 fusion with segmental screw fixation. The 5th Soonchunhyang university spine symposium. Seoul, Korea. March 20, 2009.
30. Microsurgical techniques in the cervical spine. 2008 Cadaever workshop on Minimally Invasive Spine Surgery, held by Korean Society of Spine Surgery. Seoul, Korea. Dec 13, 2008.
29. Occipitocervical and atlantoaxial fusion. 2008 Instructional Course Lecture on Cervical Spine, held by Korean Society of Spine Surgery. Seoul, Korea. Seoul, Korea. Sep 27, 2008.
28. Surgical stabilization for C1-C2 instability. The 12th Hokkaido University Spinal Reconstruction Seminar. Sapporo, Japan. July 14-18, 2008.
27. Segmental screw fixation for the treatment of C1-C2 instability. The 7th combined congress of the spine and pediatric section, APOA (Asia Pacific Orthopaedic association). Jeju, Korea. June 4-7 2008.
26. Pros and Cons Debate: Relatively asymptomatic os odontoideum: surgery or not? The 25th Annual Spring Meeting of the Korean Society of Spine Surgery. Seoul, Korea. April 4, 2008.
25. Surgical treatment of C1-2 instability. 2008 Seoul National University Orthopaedic Update Symposium I. Seoul, Korea. Jan. 27, 2008
24. Surgical Treatment of C1-2 Instability. Combined Asean Orthopedics Association 27 -Vietnam Orthopedics Association 6 – Spine Society of Ho Chi Minh city, Vietnam 12 (ASEAN 27-VOA 6-SSHV 12) Meeting, Dec 5-8, 2007.
23. Intraoperative Navigation for Spine Surgery. The 6th Minimally Invasive Spine Surgery, held by Korean Society of Spine Surgery & The 5th Yongdong Severance Spine Hospital Symposium. Seoul, Korea. Nov 2, 2007.
22. Computer Assisted Spine Surgery (CASS). The 5th Instructional Course Lectures on Minimally Invasive Spine Surgery, held by Korean Society of Spine Surgery. Seoul, Korea. Jun 17, 2007.
21. Surgical treatment of atlantoaxial instability. Seoul, Korea. May, 2006.

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20. Presurgical simulation for spinal screw placement. The 3rd Spine Forum. Seoul, Korea. Feb. 10, 2006.

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19. Percutaneous endoscopic cervical discectomy (PECD). 2006 Cadaever Workshop on Minimally Invasive Spine Surgery, held by Korean Society of Spine Surgery. Seoul, Korea. Feb. 4, 2006.
18. Microendoscopic discectomy (MED). 2006 Seoul National University Orthopaedic Update (I). Seoul, Korea. Jan. 22, 2006.
17. Computer-assisted spine surgery in Korea. The ISSLS Lecture Course combined with the 10th Spine Seminar and Training Course in HCM City, Viet Nam. December 9-10, 2005.
16. Computer and Robot Assisted Spine Surgery. The 2005 Annual Fall Meeting of Korean Society of Precision Engineering. Seoul, Korea. Oct. 20-21, 2005.
15. Computer-assisted spine surgery. The 4th Instructional Course Lectures on Minimally Invasive Spine Surgery, held by Korean Society of Spine Surgery. Seoul, Korea. May 1, 2005.
14. Cervical radiculopathy. Workshop on interventional pain management. 2005. 3. 26.
13. Percutaneous vertebroplasty for osteoporotic compression fractures. 2005 Seoul National University Orthopaedic Update (I). Seoul, Korea. Jan. 23, 2005.
12. Image-guided surgery of the spine. 제 8회 3차원 의학영상연구회 학술대회. Seoul, Korea. 2004. 12. 15.
11. Percutaneous endoscopic cervical discectomy (PECD). 2004 Cadaever Workshop on Minimally Invasive Spine Surgery, held by Korean Society of Spine Surgery. Seoul, Korea. Dec. 18, 2004.
10. Minimally invasive procedures for osteoporotic spine fractures. Instructional Course Lectures of the 48th Annual Fall Congress of the Korean Orthopaedic Association. Seoul, Korea. Oct. 15, 2004.
9. Posterior subaxial cervical fusion. The 5th Instructional Course Lectures on the Cervical Spine. Seoul, Korea. Sep. 12, 2004.

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8. Computer-assisted orthopedic surgery. The 1st Instructional Course Lectures of the Korean Orthopaedic Research Society. Seoul, Korea. Jun. 6, 2004.
7. Pros and Cons Debate: Percutaneous vertebral augmentation, The 21st Annual Fall Meeting of the Korean Society of Spine Surgery. Seoul, Korea. May 28, 2004.
6. Recent trends in computer-assisted orthopedic surgery. The 27th Annual Fall Meeting of the Korea Society of Medical & Biological Engineering. Seoul, Korea. Nov. 15, 2002.
5. Complications of vertebroplasty. The Korean Society of Bone Metabolism. Oct. 6, 2002.
4. Surgical Anatomy of the Cervical Spine. The 3rd Instructional Course Lectures on the Cervical Spine. Seoul, Korea. Sep. 15, 2002.
3. Introduction to computer-assisted orthopedic surgery. The 51st Annual Fall Congress of the Korean Association of Plastic Surgery. Seoul, Korea. Nov. 9, 2001.
2. Introduction to computer-assisted orthopedic surgery. The 5th seminar of the study group on three-dimensional medical images. Seoul, Korea. March 27, 2001.
1. Surgical anatomy of the cervical spine. The 1st Instructional Course Lectures on the Cervical Spine. Seoul, Korea. May 3, 1998.