Thursday, August 17

[FP01] Free Paper 01 (Adult Spinal Deformity 1)

Date & Time	August 17 (Thursday), 08:00-08:30	Room	Room A
Chairs	Shah Alam (Bangladesh Spine and Orthopedic Hospital, Bangladesh) Kyu Jung Cho (Inha University College of Medicine, Korea) Seong Yi (Yonsei University College of Medicine, Korea)
Presentations	08:00-08:05 Surgery Using an Iliac Screw in Patients with Non-Ambulatory Neuromuscular Scoliosis Worsens Hip Subluxation by Reducing the Pelvic Tilting Angle. (Relationship between Pelvic Parameters and Hip Subluxation in Surgery Using a Mono-Iliac Screw) Sang-Ho Kim (College of Medicine, Yonsei University, Korea) 08:05-08:10 Influence of Negative Sagittal Imbalance and Upper Cervical Malalignment on Clinical Outcomes in Patients with Craniovertebral Junction Kyphosis Jae Taek Hong (Eunpyung St. Mary's Hospital, The Catholic University of Korea, Korea) 08:10-08:15 Is There an Association between Psychiatric Disorders and Adolescent Idiopathic Scoliosis? A Large-Database Study Soo-Bin Lee (Catholic Kwandong University International St.Mary's Hospital, Korea) 08:15-08:20 Can Intraoperative C2 Slope Predict Postoperative Standing Sagittal Alignment Following Cervical Deformity Correction? Namhoo Kim (Yonsei University College of Medicine, Korea) 08:20-08:30 Discussion (Including QnA)

[FP02] Free Paper 02 (Endoscopic Technologies & Techniques 1)

Date & Time	August 17 (Thursday), 08:00-08:30	Room	Room B
Chairs	Yung-Hsiao Chiang (Taipei Medical University Hospital, Taiwan) Chang-Nam Kang (Hanyang University College of Medicine, Korea) Sung Bum Kim (Kyung Hee University School of Medicine, Korea)
Presentations	08:00-08:05 Biportal Endoscopic Paraspinal Decompressive Foraminotomy for Lumbar Foraminal Stenosis: Clinical Outcomes and Factors Influencing Unsatisfactory Outcomes Ki-Han You (Hallym University College of Medicine, Kangnam Sacred Heart Hospital, Korea) 08:05-08:10 Minimally Invasive Transforaminal Lumbar Interbody Fusion Using the Biportal Endoscopic Techniques Versus Microscopic Tubular Technique Hyun-Jin Park (Hallym university Kangnam Sacred Heart Hospital, Korea) 08:10-08:15 Learning Curve and Clinical Outcome of Biportal Endoscopic-Assisted Lumbar Interbody Fusion Ju Eun Kim (Baroseomyeon Hospital, Korea) 08:15-08:20 Anterior Cervical Discectomy and Fusion Versus Cervical Biportal Endoscopic Spine Surgery: A Retrospective Comparison with a Five-Year Experiences Seok Bong Jung (Jinju Bon Hospital, Korea) 08:20-08:30 Discussion (Including QnA)

[FP03] Free Paper 03 (MIS 1)

Date & Time	August 17 (Thursday), 08:00-08:30	Room	Room C
Chairs	Huilin Yang (The First Affiliated Hospital of Soochow University, China) Chung Hwan Kim (University of Ulsan College of Medicine, Korea) Chi Heon Kim (Seoul National University College of Medicine, Korea)
Presentations	08:00-08:05 Learning Curve for Biportal Endoscopic Posterior Cervical Foraminotomy Determined Using the Cumulative Summation Test Jin-Tak Hyun (Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Korea) 08:05-08:10 Ten-Year Outcomes of Minimally Invasive Versus Open Transforaminal Lumbar Interbody Fusion in Patients with Single-Level Lumbar Spondylolisthesis Young-Hyun Yoon (Yonsei University College of Medicine, Korea) 08:10-08:15 Fusion Success in Patients with Degenerative Lumbar Disease without Spondylolisthesis: A Global Study Comparing Anterolateral Versus Posterior MIS Approaches at 2-Years Follow-Up Jiwon Park (Korea University Ansan Hospital, Korea) 08:15-08:20 Mini Open Retropleural Approach Based on Microneurospinal Surgical Anatomy Focusing on Membranes and Layers Takashi Moriwaki (Osaka Gyoumeikan Hospital, Japan) 08:20-08:30 Discussion (Including QnA)

[FP04] Free Paper 04 (Adult Spinal Deformity 2)

Date & Time	August 17 (Thursday), 08:30-09:00	Room	Room A
Chairs	Fan Tao (Capital Medical University, China) Chang Ju Hwang (University of Ulsan College of Medicine, Korea) Joo Han Kim (Korea University College of Medicine, Korea)
Presentations	08:30-08:35 Decision of Pedicle Subtraction Osteotomy Vertebra in Surgical Correction for Ankylosing Spondylitis with Thoracolumbar Kyphosis Xiongjie Li (Kyung Hee University Hospital at Gangdong, Kyung Hee University, China) 08:35-08:40 Use of Iliac Screw Associated with More Correction of Lumbar Lordosis than S2-Alar-Iliac Screw for Adult Spinal Deformity JunBum Park (Kyung Hee University Hospital at Gangdong, Kyung Hee University, Korea) 08:40-08:45 Distal Junctional Failure after Long Fusion Surgery Stopping at L5 in Patients with Adult Spinal Deformity Ho Yong Choi (Kyung Hee University Hospital at Gangdong, Korea) 08:45-08:50 Custom Interbody Cage Design and Manufacturing for Correction of Lumbar Spine Deformity David Edis (Monash University, Australia) 08:50-09:00 Discussion (Including QnA)

[FP05] Free Paper 05 (Endoscopic Technologies & Techniques 2)

Date & Time	August 17 (Thursday), 08:30-09:00	Room	Room B
Chairs	Luthfi Gatam (Eka Hospital BSD, Indonesia) Hyun-Jin Park (Hallym University College of Medicine, Korea) Junseok Bae (Wooridul Spine Hospital, Korea)
Presentations	08:30-08:35 Clinical Analysis of of Biportal Endoscope and Tubular Microscope for Single-Level Lumbar Discectomy in Obese Patients: A Multicenter, Retrospective Analysis Sang-Min Park (Seoul National University Bundang Hospital, Korea) 08:35-08:40 Single-Level Endoscopic TLIF Achieves Similar 1-Year Clinical and Radiological Outcomes Compared to Conventional MIS-TLIF With Reduced Surgery Duration, Blood Loss and Length of Hospital Stay David Shaoen Sim (Singapore General Hospital, Singapore) 08:40-08:45 Comparison of Primary Versus Revision Lumbar Discectomy Using a Biportal Endoscopic Technique Jae Yeun Hwang (Kangnam Sacred Heart Hospital, Hallym University School of Medicine, Korea) 08:45-08:50 Effectiveness of the Two-Way BESS Decompression in Central to Extraforaminal Stenosis Patients with Facet Joint Preservation: Minimum 1 Year Short-Term Follow Up Young-Hyun Yoon (Yonsei University College of Medicine, Korea) 08:50-09:00 Discussion (Including QnA)

[FP06] Free Paper 06 (MIS 2)

Date & Time	August 17 (Thursday), 08:30-09:00	Room	Room C
Chairs	Huilin Yang (The First Affiliated Hospital of Soochow University, China) Ji-Won Kwon (Yonsei University College of Medicine, Korea) Kyoung Tae Kim (Kyungpook National University School of Medicine, Korea)
Presentations	08:30-08:35 Slip Reduction in Oblique Lateral Interbody Fusion for Degenerative Spondylolisthesis Hee-Woong Chung (Ajou University Hospital, Korea) 08:35-08:40 Decompression without Fusion in Degenerative Lumbar Spondylolisthesis : Biportal Endoscopic Spinal Surgery Ho-Jin Lee (Chungnam National University College of Medicine, Korea) 08:40-08:45 A Morphological Assessment Method for Percutaneous augmentation In Elderly Osteoporotic Bursting Fracture Yu-Ching Hsiao (National Cheng Kung University, Taiwan) 08:45-08:50 Cost-Utility Analysis of Endoscopic Lumbar Discectomy Following a Uniform Clinical Pathway in the Korean National Health Insurance System Chi Heon Kim (Seoul National Univeristy Hospital, Korea) 08:50-09:00 Discussion (Including QnA)

[SY01] Symposium 01: Adult Sagittal Imbalance

Date & Time	August 17 (Thursday), 09:00-10:15	Room	Room A
Chairs	Yoshihisa Kotani (Kansai Medical University Medical Center, Japan) Chong-Suh Lee (Bumin Hospital, Korea) Jung-Kil Lee (Chonnam National University Medical School, Korea)
Presentations	09:00-09:12 Deformity Surgery in the Elderly Paul Park (University of Tennessee Health Science Center, USA) 09:12-09:24 Selecting Osteotomy Location in Revision Surgery for Adult Sagittal Imbalance Han Jo Kim (Hospital for Special Surgery, USA) 09:24-09:36 Patient-Specific Implants to Accurately Attain Desired Spinal Alignment Jae-Hyuk Yang (Korea University College of Medicine, Korea) 09:36-09:48 Cervical Spondylotic Kyphosis with Stenosis: C7/T1 Sparing Anterior Only Multi-Level Correction Keun Su Kim (Yonsei University College of Medicine, Korea) 09:48-10:00 How to Prevent PJK with MIS Techniques for ASD Neel Anand (Cedars Sinai Medical Center, USA) 10:00-10:15 Discussion (Including QnA)

[SY02] Symposium 02: What You Should Know: How to Maximize the Effects of MIS Fusion

Date & Time	August 17 (Thursday), 09:00-10:15	Room	Room B
Chairs	Vit Kotheeranurak (Chulalongkorn University & King Chulalongkorn Memorial Hospital, Thailand) Jae Chul Lee (Soonchunhyang University College of Medicine, Korea) Seung Won Park (Chung-ang University College of Medicine, Korea)
Presentations	09:00-09:12 Single Position Posterior Instrumentation after Minimally Invasive Lateral Fusion Worawat Limthongkul (Chulalongkorn University, Thailand) 09:12-09:24 Minimizing Radiation Exposure for MIS Spinal Fusion: Enhancing Safety and Surgical Precision with Technology Stephen Ryu (Stanford University Medical Center, USA) 09:24-09:36 Improving Lordosis in MIS Fusions - What Strategies Are Available? Jacob Oh (Tan Tock Seng Hospital, Singapore) 09:36-09:48 Expandable Lumbar Interbody Fusion Cages in the Treatment of Spinal Deformity Charles L. Branch (Wake Forest University School of Medicine, USA) 09:48-10:00 Use of Various Bone Substitues for MIS Fusion ; Pros and Cons of Each Substitutes Sang-Bum Kim (Chungnam National University College of Medicine, Korea) 10:00-10:15 Discussion (Including QnA)

[PA&KA] Presidential Address & Keynote Address

Date & Time	August 17 (Thursday), 10:35-11:15	Room	Room A+B
Presentations	10:35-10:50 Presidential Address Seok Woo Kim (President of ISASS AP 2023) 10:50-10:55 Presidential Address Keung Nyun Kim (President of ISASS AP 2023) 10:55-11:05 Keynote Address Michael Y. Wang (President of ISASS) 11:05-11:15 Introduction of IJSS Charles L. Branch (Editor-in-Chief of IJSS)

[PL01] Plenary Lecture 01: MIS Surgery for ASD (Adult Spinal Deformity)

Date & Time	August 17 (Thursday), 11:15-12:35	Room	Room A+B
Chairs	Jacob Oh (Tan Tock Seng Hospital, Singapore) Michael Y. Wang (University of Miami Hospital, USA) Jung-Hee Lee (Kyung Hee University School of Medicine, Korea) Keung Nyun Kim (Yonsei University College of Medicine, Korea)
Presentations	11:15-11:20 Introduction: What's Happening Now? Jacob Oh (Tan Tock Seng Hospital, Singapore) 11:20-11:32 Tailored Modification of Lateral Access Surgery for Minor and Major Spinal Deformities Jae Chul Lee (Soonchunhyang University College of Medicine, Korea) 11:32-11:44 Multilevel MIS Lateral Fusion for Adult Spinal Deformity Neel Anand (Cedars Sinai Medical Center, USA) 11:44-11:56 Anterior Column Realignment for Adult Spinal Deformity Juan Uribe (Barrow Neurological Institute, USA) 11:56-12:08 Comparative Analysis of Clinical and Radiologic Outcome after MIS Correction vs Classic Technique Jae-Young Hong (Korea University College of Medicine, Korea) 12:08-12:20 Utilization of Neuromonitoring and Its Clinical Significance in MIS Deformity Surgery Jae Taek Hong (The Catholic University of Korea College of Medicine, Korea) 12:20-12:35 Discussion (Including QnA)

[LS01] Luncheon Symposium 1 by Viatris Korea

Date & Time	August 17 (Thursday), 12:50-13:50	Room	Room A
Chair	Sun Ho Lee (Sungkyunkwan University School of Medicine, Korea)
Presentation	12:50-13:50 Neuropathic Pain in Low Back Pain: Prevalence, Risk Factor and Real Practice Ji-Won Kwon (Yonsei University College of Medicine, Korea)

[LS02] Luncheon Symposium 2 by CGbio

Date & Time	August 17 (Thursday), 12:50-13:50	Room	Room B
Chair	Chang-Nam Kang (Hanyang University College of Medicine, Korea)
Presentation	12:50-13:20 Efficacy and Safety of Novosis Putty Jae Hwan Cho (University of Ulsan College of Medicine, Korea)
Chair	Keung Nyun Kim (Yonsei University College of Medicine, Korea)
Presentation	13:20-13:50 Advanced Expandable Cage in MIS-TLIF: EXCENDER Jeong-Yoon Park (Yonsei University College of Medicine, Korea)

[LS03] Luncheon Symposium 3 by SpinoTech Corp.

Date & Time	August 17 (Thursday), 12:50-13:50	Room	Room C
Chair	Jae Taek Hong (The Catholic University of Korea, Korea)
Presentations	12:50-13:20 Kinematics/ Mechanical Properties Review Surrounding the Cervical Arthroplasty;  Prompting the Proper Implementation of the Devices Junho Lee (Kyung Hee University School of Medicine, Korea) 13:20-13:50 ROTAIO Cervical Arthroplasty; Kinematic Rationale and Clinical Experience Claudius Thomé (Innsbruck Medical University, Germany)

[SY03] Symposium 03: Current Issues of Deformity Surgery

Date & Time	August 17 (Thursday), 13:50-15:05	Room	Room A
Chairs	Han Jo Kim (Hospital for Special Surgery, USA) Hak-Sun Kim (Yonsei University College of Medicine, Korea) Seung-Hwan Yoon (Inha University College of Medicine, Korea)
Presentations	13:50-14:02 Adult Deformity with OLIF51 Yoshihisa Kotani (Kansai Medical University Medical Center, Japan) 14:02-14:14 Minimally Invasive Techniques to Reduce Morbidity and Improve Alignment Sam Yeol Chang (Seoul National University College of Medicine, Korea) 14:14-14:26 ACR for Treating Deformities Michael Y. Wang (University of Miami Hospital, USA) 14:26-14:38 MIS (Thoracoscopy) in Pediatric Scoliosis with Tethering Massimo Balsano (University and Hospital Trust, Italy) 14:38-14:50 Optimizing Value in Adult Spinal Deformity Surgery Han Jo Kim (Hospital for Special Surgery, USA) 14:50-15:05 Discussion (Including QnA)

[SY04] Symposium 04: MIS Fusion: What's New? What's Coming?

Date & Time	August 17 (Thursday), 13:50-15:05	Room	Room B
Chairs	Neel Anand (Cedars Sinai Medical Center, USA) Se-Jun Park (Sungkyunkwan University School of Medicine, Korea) Se-Hoon Kim (Korea University College of Medicine, Korea)
Presentations	13:50-14:02 Adjacent Segmental Pathology after Minimally Invasive TLIF - 1, 2, 5 and 10 Years Follow-Up Yung Park (National Health Insurance Service Ilsan Hospital, Korea) 14:02-14:14 Minimally Invasive Lateral Fusion or OLIF...Which Is Best? Richard Hynes (The B.A.C.K. Center, USA) 14:14-14:26 Advancement of Intervertebral Cage Technology ; How Did It Impact MIS Fusion? Tae-Keun Ahn (CHA University School of Medicine, Korea) 14:26-14:38 L5/S1 OLIF ; Technical Consideration and Application Seung Won Park (Chung-ang University College of Medicine, Korea) 14:38-14:50 Complication Avoidance and Management in MI-TLIF Weerasak Singhatanadgige (King Chulalongkorn Memorial Hospital, Thailand) 14:50-15:05 Discussion (Including QnA)

[BP01] Best Paper 01

Date & Time	August 17 (Thursday), 15:25-16:25	Room	Room A
Chairs	Wataru Narita (Kameoka City Hospital, Japan) Hansen A. Yuan (SUNY Upstate Medical University, USA) Jae Chul Lee (Soonchunhyang University College of Medicine, Korea) Jae Chil Jang (Soonchunhyang University College of Medicine, Korea)
Presentations	15:25-15:35 Can We Control Lateral Shoulder Balance Through Proximal Thoracic Curve Correction in Lenke Type 2 Adolescent Idiopathic Scoliosis? Hyung Rae Lee (Uijeongbu Eulji Medical Center, Korea) 15:35-15:45 Rotational Changes Following Use of Direct Vertebral Rotation in Adolescent Idiopathic Scoliosis Dong-Gune Chang (Inje University Sanggye Paik Hospital, Korea) 15:45-15:55 Time-Dependent Changes in Stiffness-Related Functional Disability (SRFD) after Long Segmental Fusion in Elderly Patients with Adult Spinal Deformity - Minimum 2-Year Follow-Up Results - Se-Jun Park (Samsung Medical Center, Sungkyunkwan University School of Medicine, Korea) 15:55-16:05 Selective Thoracolumbar Fusion in Adult Spinal Deformity (ASD) Double Curves with Circumferential Minimally Invasive Surgery (CMIS): 2-Year Minimum Follow Up Neel Anand (Cedars Sinai Medical Center, USA) 16:05-16:15 Stable Long-Term Regional and Global Alignment in Patients Treated with Minimally Invasive Lateral Retropleural Thoracic Discectomy Without Fixation Steve Cho (Barrow Neurological Institute, USA) 16:15-16:25 Advancements in Cervical Myelopathy Treatment: Exploring Minimally Invasive Laminoplasty Through Comparative Analysis Wataru Narita (Kameoka Municipal Hospital, Japan)

[BP02] Best Paper 02

Date & Time	August 17 (Thursday), 15:25-16:25	Room	Room B
Chairs	Muhammad Tariq Sohail (Doctors Hosp. & Medical Ctr., Pakistan) Charles L. Branch (Wake Forest University School of Medicine, USA) Young-Yul Kim (The Catholic University of Korea College of Medicine, Korea) Chun Kee Chung (Seoul National University College of Medicine, Korea)
Presentations	15:25-15:35 Proximal Junction Uninstrumented Bone Fusion as a Feasible Additive Procedure to Delay or Prevent Proximal Junctional Kyphosis/Failure Sungjae An (Korea University Anam Hospital, Korea) 15:35-15:45 Comparison of Fusion, Subsidence, and Clinical Results Between 3D-Printed Porous Titanium Cage and Polyetheretherketone (PEEK) Cage in Posterior Lumbar Interbody Fusion: A Minimum of 2-Years Follow-Up Sehan Park (Asan Medical Center, University of Ulsan College of Medicine, Korea) 15:45-15:55 Revision Surgery of Upper Cervical Fusion to Correct Atlantoaxial Instability: A Retrospective Study of 19 Cases Donghun Kim (Eunpyeong St. Mary's Hospital, Korea) 15:55-16:05 Design and 3D Printing of Novel Titanium Spine Rods with Lower Flexural Modulus & Stiffness Profile with Optimised Imaging Compatibility Naresh Kumar (National University Health System, Singapore) 16:05-16:15 The Corrective Criteria to Avoid Adjacent Segment Degeneration Following Surgical Correction for Lumbar Spondylolisthesis Sung-Min Kim (Kyung Hee University Hospital at Gangdong, Kyung Hee University, Korea) 16:15-16:25 Efficacy of a Newly Designed Helical-Shaped 3D-Printed Titanium Cage For Cervical Vertebral Defect Healing in Rabbits Mosharraf Hossain (Soonchunhyang University, College of Medicine, Bucheon Hospital, Bangladesh)

[FP07] Free Paper 07 (Miscellaneous 1)

Date & Time	August 17 (Thursday), 15:25-15:55	Room	Room C
Chairs	Hee Kit Wong (National University Health System, Singapore) Jin Hwan Kim (Inje University College of Medicine, Korea) Seung-Myung Moon (Hallym University College of Medicine, Korea)
Presentations	15:25-15:30 Machine Learning-Based Measurement of the Regional and Global Spinal Parameters Using the Concept of Incidence Angle of Inflection Points Sung Hoon Choi (Hanyang University Hospital, Korea) 15:30-15:35 Injectable Nanomaterial-Based Peptide Hydrogel: A Novel Therapeutic Approach for Intervertebral Disc Regeneration Inbo Han (CHA Univ. School of Medicine, Korea) 15:35-15:40 Applying Bioglue® After Durotomy in Intradural Spinal Cord Tumor Causing Neurologic Deterioration Sun Woo Jang (Asan Medical Center, Korea) 15:40-15:45 Monolithic 3D-Printed Silicon Nitride-PEEK Composite Cervical Cages Demonstrate Antimicrobial Effects In Vitro Ryan Bock (SINTX Technologies, USA) 15:45-15:55 Discussion (Including QnA)

[FP08] Free Paper 08 (Miscellaneous 2)

Date & Time	August 17 (Thursday), 15:55-16:25	Room	Room C
Chairs	John Yunseo Choi (Spine Ortho Clinic, Australia) Kee-Won Rhyu (The Catholic University of Korea College of Medicine, Korea) Koang Hum Bak (Hanyang University College of Medicine, Korea)
Presentations	15:55-16:00 Does Posterior Lumbar Interbody Fusion Using 16 Degree Rectangular Shape 3-D Cage with Modified Smith-Peterson Osteotomy Provides Proper Segmental Lordosis? Sung Bum Kim (Kyung-Hee University Medical Center, Korea) 16:00-16:05 Comparative Analysis of the Occurrence Factors for Adjacent Segment Disease -With Patients Followed More than 10 Years after Lumbar Spinal Fusion- Taejong Jeong (Sahmyook Seoul Medical Center, Korea) 16:05-16:10 Short-Term Outcomes of B-Dyn Dynamic Fixation System in Treatment of Lumbar Degenerative Diseases Ngoc Quyen Nguyen (108 Military Central Hospital, Viet Nam) 16:10-16:15 Sacroiliac Joint Injection for Management Sacroiliac Joint Pain after Lumbosacral Spinal Fusion Surgery: A Retrospective Study at One Center in Vietnam Vo Thanh Nghia (Neurosurgery, Viet Nam) 16:15-16:25 Discussion (Including QnA)

[FP09] Free Paper 09 (Trauma, Tumor & Infection 1)

Date & Time	August 17 (Thursday), 16:25-16:55	Room	Room A
Chairs	Ruey-Mo Lin (Tainan Municipal An-Nan Hospital, China Medical University, Taiwan) Chang Hwa Hong (Soonchunhyang University College of Medicine, Korea) Jeong-Yoon Park (Yonsei University College of Medicine, Korea)
Presentations	16:25-16:30 Prognostic Factors in Spinal Intradural Hemangioblastoma: An Analysis of Surgical Outcomes and Tumor Characteristics Hyun Jun Jang (Gangnam Severance Hospital, Korea) 16:30-16:35 Trends in Survival and Surgical Methods in Patients Surgically Treated for Metastatic Spinal Tumors: 25-Year Experience in a Single Institution Han-Seok Yang (Samsung Medical Center, Sungkyunkwan University School of Medicine, Korea) 16:35-16:40 Bone Bridge Effect for the Treatment of Acute Osteoporosis Vertebral Compression Fractures: Multistrategic Approach Using Anabolic Versus Anti-Resorptive Agents Ja-Yeong Yoon (Sun General Hospital, Korea) 16:40-16:45 Clinical Outcomes of Surgical Debridement Only in Pyogenic Spondylitis Ohsang Kwon (Seoul National University Bundang Hospital, Korea) 16:45-16:55 Discussion (Including QnA)

[FP10] Free Paper 10 (Biomechanics)

Date & Time	August 17 (Thursday), 16:25-16:55	Room	Room B
Chairs	Yung-Hsiao Chiang (Taipei Medical University Hospital, Taiwan) Sam Yeol Chang (Seoul National University College of Medicine, Korea) Hyeun Sung Kim (Nanoori Hospital, Korea)
Presentations	16:25-16:30 Determining the Instantaneous Center of Rotation of the Cervical Spine via Computer-Assisted Radiographic Analysis Jae Hyuk Shin (St. Vincent's Hospital, The Catholic University of Korea, Korea) 16:30-16:35 Biomechanical Comparison of Posterior Fixation Combinations with an Allograft Spacer between the Lateral Mass and Pedicle Screws Soo-Bin Lee (Catholic Kwandong University International St.Mary's Hospital, Korea) 16:35-16:40 Exploring the Correlation between MRI Degenerative Stages of Intervertebral Discs, Chemical Composition, and Biomechanical Properties of the Nucleus Pulposus Kuo-Yuan Huang (National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Taiwan) 16:40-16:45 The Effect of a New Tethering Device on the Biomechanics of Short-Segment Fusion of the Lumbar Spine: A Finite Element Analysis Natthaphat Viriya (Chulalongkorn University, Thailand) 16:45-16:55 Discussion (Including QnA)

[FP11] Free Paper 11 (Miscellaneous 3)

Date & Time	August 17 (Thursday), 16:25-16:55	Room	Room C
Chairs	Worawat Limthongkul (Chulalongkorn University, Thailand) Jaewan Soh (Sahmyook Medical Center, Korea) Dosang Cho (Ewha Womans University College of Medicine, Korea)
Presentations	16:25-16:30 Lumbar Arthroplasty for Treatment of Primary or Recurrent Lumbar Disc Herniation Juan Amaya (Spine Ortho Clinic, Colombia) 16:30-16:35 The Result of Treating Myelopathy due to Cervical Disc Herniation with Anterior Cervical Discectomy and Fusion Surgery Duy Nguyen Nhat (University of Medicine and Pharmacy at Ho Chi Minh City, Viet Nam) 16:35-16:40 Unconstrained Cervical Total Disc Replacement Not One Design Suits Every Patient. Case Report Juan Amaya (Spine Ortho Clinic, Colombia) 16:40-16:45 How Would One Select Levels to be Instrumented in Metastatic Spine Tumour Surgery? Naresh Kumar (National University Hospital, Singapore) 16:45-16:55 Discussion (Including QnA)

[FP12] Free Paper 12 (Trauma, Tumor & Infection 2)

Date & Time	August 17 (Thursday), 16:55-17:25	Room	Room A
Chairs	Fan Tao (Capital Medical University, China) Dong Ki Ahn (Seoul Sacred Heart General Hospital, Korea) Sun Ho Lee (Sungkyunkwan University School of Medicine, Korea)
Presentations	16:55-17:00 Effect of Preoperative Acupuncture and Epidural Steroid Injection on Postoperative Infection after Lumbar Spinal Surgery Sahyun Sung (College of Medicine, Ewha Womans University Seoul Hospital, Korea) 17:00-17:05 Pharmacokinetic Interpretation of Applying Local Drug Delivery System for the Treatment of Deep Surgical Site Infection in the Spine Ahmad Khalid Madadi (Inje University, Afghanistan) 17:05-17:10 Which Factors Are Associated with the Risk of Re-Operation after Percutaneous Vertebroplasty or Kyphoplasty for Thoracolumbar Vertebral Fracture? Analysis of the National Health Insurance Service Claims Data in Korea (2006-2017) Sung-ryul Choi (Yonsei University College of Medicine, Korea) 17:10-17:15 Anatomical Consideration for Anterior Approach of Cervicothoracic Junction: A CT Image Analysis Eugene Park (Kyungpook National University Hospital, Korea) 17:15-17:25 Discussion (Including QnA)

[FP13] Free Paper 13 (Value, Outcomes & Healthcare Economics)

Date & Time	August 17 (Thursday), 16:55-17:25	Room	Room B
Chairs	Hee Kit Wong (National University of Singapore, Singapore) Hun-Kyu Shin (Sungkyunkwan University School of Medicine, Korea) Yong-Jun Cho (Hallym University College of Medicine, Korea)
Presentations	16:55-17:00 The Comprehensive Enhanced Recovery after Surgery (ERAS) Protocol in the Entire Spinal Surgery: A Comparative Analysis of Clinical Outcomes and Medical Costs between Primary Spinal Tumors and Degenerative Spinal Diseases Woon Tak Yuh (Hallym University Dongtan Sacred Heart Hospital, Korea) 17:00-17:05 Risk of Reoperation and Infection Rate after Spine Osteotomy and Fusion Compare with Spinal Fusion Alone Jaewon Shin (National Health Insurance Service, Korea) 17:05-17:10 The Modified Frailty Index Can Predict the Postoperative Complications after Lumbar Spine Surgery Jiwon Park (Korea University Ansan Hospital, Korea) 17:10-17:15 Does Epidural Steroid Injection Affect Osteoporosis in Patients with Denosumab Therapy? JunHan Kim (CHA Bundang Medical Center, CHA University, Korea) 17:15-17:25 Discussion (Including QnA)

[FP14] Free Paper 14 (Miscellaneous 4)

Date & Time	August 17 (Thursday), 16:55-17:25	Room	Room C
Chairs	Michael Y. Wang (University of Miami Hospital, USA) Jae Hwan Cho (University of Ulsan College of Medicine, Korea) Yoon Ha (Yonsei University College of Medicine, Korea)
Presentations	16:55-17:00 Risk Factors for Radiographic Progression of Proximal Junctional Fracture in Patients Undergoing Surgical Treatment for Adult Spinal Deformity Choong-Won Jung (Samsung Medical Center, Sungkyunkwan University School of Medicine, Korea) 17:00-17:05 Case-Based Review of Surgical Treatment for Pediatric Sacrococcygeal Teratomas Mohammad Mohsen Mosleh (Inje University Ilsan Paik Hospital, Graduate School of Medicine, Afghanistan) 17:05-17:10 Tandem Spinal Stenosis: A Proposed Algorithm Based on Systematic Review Todsapon Chancharoenchai (Chulalongkorn University, Thailand) 17:10-17:15 Feasibility Assessment of an Expandable Lumbar Interbody Cage in Patients with High-Risk Factors for Subsidence: Preliminary Report Byung-Il Yoon (Chung-Ang University Hospital, College of Medicine, Chung-Ang University, Korea) 17:15-17:25 Discussion (Including QnA)

Friday, August 18

[FP15] Free Paper 15 (Trauma, Tumor & Infection 3)

Date & Time	August 18 (Friday), 08:00-08:30	Room	Room A
Chairs	Paul Park (University of Tennessee Health Science Center, USA) Jeong-Hyun Yoo (Seongnam Citizens Medical Center, Korea) Chang-Il Ju (Chosun University College of Medicine, Korea)
Presentations	08:00-08:05 Optimal Surgical Methods for Solitary Metastasis of the Thoracolumbar Spine Chang-Min Ha (Samsung Medical Center, Sungkyunkwan University School of Medicine, Korea) 08:05-08:10 Some Aspects of Dorsal Stabilization in Odontoid Fractures Konstantin Semkin (Simferopol Emergency Hospital, Russia) 08:10-08:15 Application of Open Door Laminoplasty Following Intradural Tumor Resection in Cervical, Thoracic, and Lumbar Spine Andhika Yudistira (Universitas Brawijaya, Indonesia) 08:15-08:20 Incidence and Treatment Trends of Infectious Spondylodiscitis in South Korea :A Nationwide Population-Based Study Hee Jung Son (Nowon Eulji Medical Center, Eulji University School of Medicine, Korea) 08:20-08:30 Discussion (Including QnA)

[FP16] Free Paper 16 (Endoscopic Technologies & Techniques 3)

Date & Time	August 18 (Friday), 08:00-08:30	Room	Room B
Chairs	Stephen Ryu (Stanford University Medical Center, USA) Dae-Jung Choi (Himnaera Hospital, Korea) Seung-Won Choi (Chungnam National University College of Medicine, Korea)
Presentations	08:00-08:05 How to Manage Intraoperative and Postoperative Bleeding in Unilateral Biportal Endoscopic Spine Surgery Yong Jin Park (Suncheon Hana Hospital, Korea) 08:05-08:10 Learning Curve and Clinical Outcome of Biportal Endoscopic Transforaminal Lumbar Interbody Fuusion Sang Bum Kim (Sejong Cheung Nam University Hospital, Korea) 08:10-08:15 What Is the Real Cause of a Postoperative Spinal Epidural Hematoma in Hypertensive Patients? Young Rok Go (Seoul Sacred Heart General Hospital, Korea) 08:15-08:20 Comparison of Minimal Invasive Versus Biportal Endoscopic Transforaminal Lumbar Interbody Fusion For Single-Level Lumbar Disease Kim Ju Eun (Baroseomyeon Hospital, Korea) 08:20-08:30 Discussion (Including QnA)

[FP17] Free Paper 17 (MIS 3)

Date & Time	August 18 (Friday), 08:00-08:30	Room	Room C
Chairs	Juan Uribe (Barrow Neurological Institute, USA) Eun Seok Son (Keimyung University School of Medicine, Korea) Je Hoon Jeong (Soonchunhyang University College of Medicine, Korea)
Presentations	08:00-08:05 The Influence on Adjacent Lumbar Segment after Oblique Lumbar Interbody Fusion for Spondylolisthesis Tae Shin Kim (Champodonamu Hospital, Korea) 08:05-08:10 Does Direct Decompression Necessary for Lateral Lumbar Interbody Fusion (LLIF)?: A Randomized Control Trial Worawat Limthongkul (Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thailand) 08:10-08:15 Risk Factors for Predicting "Clinical" Indirect Decompression Failure Kaweekrai Anusart (Chulalongkorn University, Thailand) 08:15-08:20 Effect of Difference Hip Positions on Lumbar Lordosis in Single Lateral Position for Lateral Lumbar Interbody Fusion Natavut Prasertkul (Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thailand) 08:20-08:30 Discussion (Including QnA)

[FP18] Free Paper 18 (Emerging Technologies & Techniques 1)

Date & Time	August 18 (Friday), 08:30-09:00	Room	Room A
Chairs	Scott Blumenthal (Texas Back Institute, USA) Deuk Soo Jun (Gachon University College of Medicine, Korea) Sung Bae Park (Seoul National University College of Medicine, Korea)
Presentations	08:30-08:35 Multi-Pose-Based Convolutional Neural Network Model for Diagnosis of Patients with Central Lumbar Spinal Stenosis Chang-Hyun Lee (Seoul National Univ Hospital, Korea) 08:35-08:40 Frontal Channel EEG-Based Biomarkers for Pain Severity Detection: Spectral Analysis, Phase-Amplitude Coupling, And Machine Learning Integration Seungjun Ryu (Daejeon Eulji University Hospital, Korea) 08:40-08:45 Deep Learning Approach for Automatic Point Detection and Sagittal Alignment Analysis in Whole-Spine Lateral Radiographs Sung Hyun Noh (Ajou University Hospital, Korea) 08:45-08:50 Comparative Study of Sagittal And Coronal Plane balance of the Spine Measured Using a 3D Anthropometric Device and Spine X-Ray Tae Hoon Kang (SMG-SNU BRM Medical Center, Korea) 08:50-09:00 Discussion (Including QnA)

[FP19] Free Paper 19 (Endoscopic Technologies & Techniques 4)

Date & Time	August 18 (Friday), 08:30-09:00	Room	Room B
Chairs	Richard Hynes (The B.A.C.K. Center, USA) Kwang-Sup Song  (Chung-ang University College of Medicine, Korea) Dong Ah Shin (Yonsei University College of Medicine, Korea)
Presentations	08:30-08:35 Expansion of Application of Unilateral Biportal Endoscopy in Degenerative Thoracic Disease Hun-chul Kim (Daechan Hospital, Korea) 08:35-08:40 Posterior Cervical Foraminotomy Using Endoscopic Spine Surgery Taehwan Chun (Samsung Grand Hospital, Korea) 08:40-08:45 Is Surgeon's Uniportal Experience Important For Unilateral Biportal Endoscopic Laminetomy? Comparative Analysis of Learning Curve Beginner and Uniportal Expert Young San Ko (Keimyung University, Korea) 08:45-08:50 Percutaneous Endoscopic Lumbar Interbody Fusion B Transkambin r Posterolateral Approach? A Novel Technique-Expandable Tunnel or ProtectionOf Exiting RootAnd Traversing Root Yi-Hung Huang (Chia Yi Christian Hospital, Taiwan) 08:50-09:00 Discussion (Including QnA)

[FP20] Free Paper 20 (MIS 4)

Date & Time	August 18 (Friday), 08:30-09:00	Room	Room C
Chairs	Anthony Yeung (DISC(Desert Institute for Spine Care), USA) Ki-Tack Kim (Dong Tan City Hospital, Korea) Jin-Sung Kim (The Catholic University of Korea College of Medicine, Korea)
Presentations	08:30-08:35 A Comparative Analysis of Bi-Portal Endoscopic Spine Surgery and Unilateral Laminotomy for Bilateral Decompression in Multilevel Lumbar Stenosis Patients Sub-Ri Park (Yonsei University College of Medicine, Korea) 08:35-08:40 An Expanded Surgical Corridor for Oblique Lumbar Interbody Fusion at L4/5: A Magnetic Resonance Imaging Study Pakawas Praisarnti (Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thailand) 08:40-08:45 Minimally Invasive Transforaminal Lumbar Interbody Fusion for Spondylolisthesis: 2 Years Results at Vietduc Hospital Tien Nguyen Le Bao (Spine Surgeon, Viet Nam) 08:45-08:50 A Less Sacrifice of Stabilizing Structure Treatment by Bilateral-Contralateral Decompression for Spinal Stenosis in Degenerative Spondylolisthesis Using Unilateral Biportal Endoscopy Dong Hyun Lee (The Leon Wiltse Memorial Hospital, Korea) 08:50-09:00 Discussion (Including QnA)

[SY05] Symposium 05: Long Term Follow Up of ADR (Artificial Disc Replacement)

Date & Time	August 18 (Friday), 09:00-10:15	Room	Room A
Chairs	Jack Zigler (Texas Back Institute, USA) Dong-Ho Lee (University of Ulsan College of Medicine, Korea) Hyunchul Shin (Sungkyunkwan University School of Medicine, Korea)
Presentations	09:00-09:12 Long Term Outcomes in Lumbar Arthroplasty Jack Zigler (Texas Back Institute, USA) 09:12-09:24 Long-term Result of Cervical Arthroplasty Ali Araghi (The Core Institute, USA) 09:24-09:36 CDA vs. Fusion for Multilevel Cervical Pathologies Byung-Wan Choi (Inje University College of Medicine, Korea) 09:36-09:48 Long-term Results and Controversies of Cervical TDR Keun Su Kim (Yonsei University College of Medicine, Korea) 09:48-10:00 Nucleus Replacement on an Early Stage Technology Ali Araghi (The Core Institute, USA) 10:00-10:15 Discussion (Including QnA)

[SY06] Symposium 06: Endoscopic Decompression for Complex Spinal Pathologies: Current State of the Art

Date & Time	August 18 (Friday), 09:00-10:15	Room	Room B
Chairs	Keng-Chang Liu (Dalin Tzu Chi General Hospital, Taiwan) Si Young Park (Yonsei University College of Medicine, Korea) Choon Keun Park (Suwon Leon Wiltse Memorial Hospital, Korea)
Presentations	09:00-09:12 Endoscopic Cervical Decompression, Is It the Real Deal? Vit Kotheeranurak (Chulalongkorn University & King Chulalongkorn Memorial Hospital, Thailand) 09:12-09:24 Biportal Endoscopic ULBD For Thoracic Spinal Stenosis Secondary To Ossified Ligamentum Flavum Cheol Wung Park (Daejeon Woori Hospital, Korea) 09:24-09:36 Endoscopic Spine Fusion: Short and Long-Term Outcomes Ju-Eun Kim (Baroseomyeon hospital, Korea) 09:36-09:48 Endoscopic Spine Fusion: Inevitable Complications and Deal Dong Hwa Heo (Champodonamu Hospital, Korea) 09:48-10:00 Modified Techniques for Full-Endoscopic Decompression Surgery Chang-Il Ju (Chosun University College of Medicine, Korea) 10:00-10:15 Discussion (Including QnA)

[PL02] Plenary Lecture 02: Navigation and Robotics: Present and Future

Date & Time	August 18 (Friday), 10:35-11:55	Room	Room A+B
Chairs	Yen-Mou Lu (Kaohsiung Medical University Hospital, Taiwan) Stephen Ryu (Stanford University Medical Center, USA) Sang-Bum Kim (Chungnam National University College of Medicine, Korea) Eun Sang Kim (Sungkyunkwan University School of Medicine, Korea)
Presentations	10:35-10:40 Introduction: What's Happening Now? Stephen Ryu (Stanford University Medical Center, USA) 10:40-10:52 Navigated LLIF Paul Park (University of Tennessee Health Science Center, USA) 10:52-11:04 Intraoperative CT Image-Based Navigation-Guided Surgery Juan Uribe (Barrow Neurological Institute, USA) 11:04-11:16 Robot-Guided Pedicle Screw Insertion Sheeraz Qureshi (Weill Cornell Medical College, Cornell University, USA) 11:16-11:28 Robotic Spine Surgery - “Learning Curve And Experience With 300 Cases” Luthfi Gatam (Eka Hospital BSD, Indonesia) 11:28-11:40 The Next Generation Robotic Spine Surgery in Korea and the Future Seong Yi (Yonsei University College of Medicine, Korea) 11:40-11:55 Discussion (Including QnA)

[LS04] Luncheon Symposium 4 by GS Medical

Date & Time	August 18 (Friday), 12:10-13:10	Room	Room A
Chair	Keun Su Kim (Yonsei University College of Medicine, Korea)
Presentation	12:10-12:40 Development and Advancement of Cervical Artificial Disc Seung-Hwan Yoon (Inha University College of Medicine, Korea) 12:40-13:10 AIF vs TDR in Cervical Spondylosis Young San Ko (Keimyung University School of Medicine, Korea)

[LS05] Luncheon Symposium 5 by Medtronic Korea

Date & Time	August 18 (Friday), 12:10-13:10	Room	Room B
Chair	Seung Won Park (Chung-ang University College of Medicine, Korea)
Presentation	12:10-13:10 Single position, Prone Lateral Surgery. Hype or Evolution? Jacob Oh (Tan Tock Seng Hospital, Singapore)

[LS06] Luncheon Symposium 6 by Dong-A ST

Date & Time	August 18 (Friday), 12:10-13:10	Room	Room C
Chair	Seok Woo Kim (Hallym University College of Medicine, Korea)
Presentation	12:10-13:10 The Evidence of Limaprost in the Treatment, Lumbar Spinal Stenosis Jae Keun Oh (Hallym University College of Medicine, Korea)

[SY07] Symposium 07: Update of Disc Arthroplasty

Date & Time	August 18 (Friday), 13:10-14:40	Room	Room A
Chairs	Ali Araghi (The Core Institute, USA) Seok Woo Kim (Hallym University College of Medicine, Korea) Keun Su Kim (Yonsei University College of Medicine, Korea)
Presentations	13:10-13:15 Introduction: What's Happening Now? Ali Araghi (The Core Institute, USA) 13:15-13:32 Clinical Evidence on Cervical Disc Arthroplasty (Prospective Multicenter Trial of Cervical Arthroplasty and Long-Term Case Presentation) Claudius Thomé (Medical University Innsbruck, Germany) 13:32-13:49 Revision Cervical Arthroplasty Scott Blumenthal (Texas Back Institute, USA) 13:49-14:06 Lessons Learned from the Failure of the Partial Disc Replacement Chan Shik Shim (Wooridul Spine Centre, Healthpoint Hospital, UAE) 14:06-14:23 Osteolysis Related to TDR : Mechanical vs. Biological Young-Yul Kim (The Catholic University of Korea College of Medicine, Korea) 14:23-14:40 Discussion (Including QnA)

[SY08] Symposium 08: Future Applications of Endoscopic Spine Surgery: What We Have and What Lies Ahead

Date & Time	August 18 (Friday), 13:10-14:40	Room	Room B
Chairs	Anthony Yeung (DISC (Desert Institute for Spine Care), USA) Kwang-Sup Song  (Chung-ang University College of Medicine, Korea) Chung-Kee Chough  (The Catholic University of Korea College of Medicine, Korea)
Presentations	13:10-13:22 The Evolution of MIS Techniques for the Treatment of Spine and Brain with Enhanced VISUALIZATION and A.I Anthony Yeung (DISC (Desert Institute for Spine Care), USA) 13:22-13:34 Advances in Lumbar Endoscopic Spine Surgery Hyun-Jin Park (Hallym University College of Medicine, Korea) 13:34-13:46 Advanced in Endoscopy for Lumbar Foraminal Stenosis Dae-Jung Choi (Himnaera Hospital, Korea) 13:46-13:58 Advances in Cervical Endoscopic Spine Surgery Seok-Bong Jung (Jinju Bon Hospital, Korea) 13:58-14:10 High Complexity Endoscopic Spine Surgery for Complex Cases Junseok Bae (Wooridul Spine Hospital, Korea) 14:10-14:22 Future of Spinal Endoscopy Kai-Uwe Lewandrowski (Center For Advanced Spine care of Southern Arizona, USA) 14:22-14:40 Discussion (Including QnA)

[SY09] Symposium 09: Advances in Spinal Tumor: What's New? What's Coming?

Date & Time	August 18 (Friday), 14:45-16:00	Room	Room A
Chairs	Naresh Kumar (National University Hospital, Singapore) Young Hoon Kim (The Catholic University of Korea College of Medicine, Korea) Woo-Kyung Kim (Gachon University College of Medicine, Korea)
Presentations	14:45-14:57 Collaborative Multicenter Studies on Spinal Cord Intramedullary Tumors and AVMs in Japan: Advancing Diagnosis, Treatment, and Understanding Toshiki Endo (Tohoku Medical and Pharmaceutical University, Japan) 14:57-15:09 Surgery on Spine Metastasis over the Last 4 Decades – An Overview of Techniques and Strategy in Cancer Treatment Christian Mazel (University Paris Nord Sorbonne, France) 15:09-15:21 Oligometastsis: Definition and Surgical Strategy Hyoungmin Kim (Seoul National University College of Medicine, Korea) 15:21-15:33 The Predictive Value of the Spinal Instability Neoplastic Score (SINS) Sun Ho Lee (Sungkyunkwan University School of Medicine, Korea) 15:33-15:45 Surgical Tips and Pearls for Intramedullary Spinal Cord Tumors Keung Nyun Kim (Yonsei University College of Medicine, Korea) 15:45-16:00 Discussion (Including QnA)

[SY10] Symposium 10: Cutting Edge of Novel Technology in Spine Surgery

Date & Time	August 18 (Friday), 14:45-16:00	Room	Room B
Chairs	John Yunseo Choi (Spine Ortho Clinic, Australia) Yung Park (National Health Insurance Service Ilsan Hospital, Korea) Insoo Kim (Keimyung University School of Medicine, Korea)
Presentations	14:45-14:57 Transforming Spine Surgery with the Metaverse: Can It be a Game-Changer in Healthcare? Wataru Narita (Kameoka City Hospital, Japan) 14:57-15:09 The MAGNAV System: A New Generation of Navigated Steerable Micro-Invasive Decompression Approach for the First Time an Accurate Safe and Effective Micro-Invasive Decompression Hansen A. Yuan (SUNY Upstate Medical University, USA) 15:09-15:21 Machine-Learning Model for Accurately Evaluating Preoperative and Postoperative Condition of Spine Surgery Gun Woo Lee (Yeungnam University College of Medicine, Korea) 15:21-15:33 Pearls and Pitfalls of O-arm Navigation Guided Pedicle Screw Placement Jae Hwan Cho (University of Ulsan College of Medicine, Korea) 15:33-15:45 Augmented Reality Assisted Pedicle Screw Fixation Sang-Min Park (Seoul National University College of Medicine, Korea) 15:45-16:00 Discussion (Including QnA)

[FP21] Free Paper 21 (Non-Operative Care)

Date & Time	August 18 (Friday), 14:45-15:15	Room	Room C
Chairs	Gabriel Liu Ka Po (National University Hospital, Singapore) Sang-Min Park (Seoul National University College of Medicine, Korea) Il Sup Kim (The Catholic University of Korea College of Medicine, Korea)
Presentations	14:45-14:50 The Radiographic Assessments of Spino-Pelvic Compensation Using Iot-Based Real-Time Ischial Pressure Adjustment Min-Cheol Seok (Inje University Ilsan Paik Hospital, College of Medicine, Korea) 14:50-14:55 Spondylitis Treated with Best Effort of Conservative Therapy Ryoo Fujisawa (Teine Keijinkai Hospital, Japan) 14:55-15:00 Comparative Experimental Study on Changes in Serum Bone Turnover Markers and Bone Mineralized Density According to Osteoporosis Drugs after Bony Manipulation in Rabbit Model Ji-Won Kwon (Yonsei University College of Medicine, Korea) 15:00-15:05 Could a Simple X-Ray be a Screening Tool for Thoracic Ossification of Ligamentum Flavum? Hyungjoo Kwon (Nowon Eulji Medical Center, Korea) 15:05-15:15 Discussion (Including QnA)

[FP22] Free Paper 22 (Cervical Degenerative 1)

Date & Time	August 18 (Friday), 15:15-15:45	Room	Room C
Chairs	Claudius Thomé (Medical University Innsbruck, Germany) Jae Jun Yang (Dongguk University Medical School, Korea) Dong-Wook Son (Pusan National University School of Medicine, Korea)
Presentations	15:15-15:20 Foraminal Decompression Technique during ACDF for Cervical Radiculopathy that Provides a Better Outcome: Total Uncinatectomy vs. Partial Uncoforaminotomy JooYoung Lee (Dong-A Medical Center, University of Dong-A College of Medicine, Korea) 15:20-15:25 Impact of Uniformly Right-Side Opening Laminoplasty on Postoperative C5 Palsy in Patients with Degenerative Cervical Myelopathy Kyung-Chung Kang (Kyung Hee University Hospital, Korea) 15:25-15:30 Shoulder Traction as a Possible Risk Factor for C5 Palsy in Anterior Cervical Surgery: 8 Cadaveric Study Junhan Kwon (Yonsei University, Korea) 15:30-15:35 Lateral Deviation of the Hyoid Bone and Thyroid Cartilage Influences Prevertebral Soft Tissue Swelling and Dysphagia after Anterior Cervical Discectomy and Fusion Jun-Young Choi (Dongguk University Ilsan Hospital, Korea) 15:35-15:45 Discussion (Including QnA)

[FP23] Free Paper 23 (Cervical Degenerative 2)

Date & Time	August 18 (Friday), 15:45-16:15	Room	Room C
Chairs	Warat Tassanawipas (Praram 9 Hospital, Thailand) Kyung-Soo Suk (Yonsei University College of Medicine, Korea) Choonghyo Kim (Kangwon National University School of Medicine, Korea)
Presentations	15:45-15:50 Radiographical Pattern Following Multi-Level Anterior Cervical Discectomy and Fusion: 'Bony Buttress Formation' Chang Hwa Ham (Korea University Guro Hospital, Korea) 15:50-15:55 The Changes in Neck Range of Motion after Laminoplasty According to Cervical Foraminal Stenosis Woo-Seok Jung (National Health Insurance Service Ilsan Hospital, Korea) 15:55-16:00 Comparative Analysis of Surgically Treated Cervical Calcium Pyrophosphate Dihydrate Deposition Versus Cervical Ossification of the Yellow Ligament Presenting with Myelopathy Patrick Timtiman (Gangnam Severance Hospital, Yonsei University College of Medicine, Philippines) 16:00-16:05 Reciprocal Changes in Radiological Parameters of Patients after Expansive Open-Door Laminoplasty: Preoperative Cervical Lordosis Is Inconsequential in K-Line Positive Cases Junseung Lee (Inje University Haeundae Paik Hospital, Korea) 16:05-16:15 Discussion (Including QnA)

[FP24] Free Paper 24 (Lumbar Degenerative 1)

Date & Time	August 18 (Friday), 16:15-16:45	Room	Room C
Chairs	Anthony Yeung (DISC (Desert Institute for Spine Care), USA) Byung-Joon Shin (Soonchunhyang University College of Medicine, Korea) Jae Keun Oh (Hallym University College of Medicine, Korea)
Presentations	16:15-16:20 Evaluation of the Efficacy and Safety of 3D Printing Porous Titanium Cage with Non-Window Versus Window Type in a Single-Level Posterior Lumbar Interbody Fusion: A Prospective, Randomized, Multicenter Study Dae-Woong Ham (Chung-Ang University Hospital, Korea) 16:20-16:25 Acute Phase Side Effects of Escherichia Coli-Derived Bone Morphogenetic Protein-2 in Lumbar Fusion Surgery Hee Jung Son (Nowon Eulji Medical Center, Eulji University School of Medicine, Korea) 16:25-16:30 The Evaluation of Feasibility of Psoas, Paraspinal, and Gluteal Muscle Index as a Predictor for Diagnosing Sarcopenia in Patients with Degenerative Lumbar Disease Dae-Woong Ham (Chung-Ang University Hospital, Korea) 16:30-16:35 Deep Learning Model for Prediction of OVF Collapse Sung Bae Park (Seoul National University Boramae Medical Center, Korea) 16:35-16:45 Discussion (Including QnA)

[FP25] Free Paper 25 (Lumbar Degenerative 2)

Date & Time	August 18 (Friday), 16:45-17:15	Room	Room C
Chairs	Mathan Sakti Yudha (Gadjah Mada University, Indonesia) Whoan-Jeang Kim (Daejeon Hankook Hospital, Korea) Ki-Jung Kim (Seoul National University College of Medicine, Korea)
Presentations	16:45-16:50 Effect of Bone Morphogenetic Protein (BMP) on Time-To-Fusion After One-Level Transforaminal Lumbar Interbody Fusion Surgery (TLIF) Based on the Difference of Bone Density Sang-Ho Kim (National Health Insurance Service Ilsan Hospital, Korea) 16:50-16:55 Mini-Open Intercostal Retroperitoneal Approach for Upper Lumbar Spine Lateral Interbody Fusion Dong Wuk Son (Pusan National University Yangsan Hospital, Korea) 16:55-17:00 Subsidence after L5-S1 Transforaminal Lumbar Interbody Fusion (TLIF) Using 3D-Printed Porous Titanium Interbody Cage; Single Institution Case Series Jungwoo Hur (Eunpyeong St.Mary's Hospital, The Catholic University of Korea, Korea) 17:00-17:05 The Influence of Rheumatoid Arthritis on Higher Reoperation Rates over Time Following Lumbar Spinal Fusion: A Nationwide Cohort Study Jin-Sung Park (Samsung Medical Center, Sungkyunkwan University School of Medicine, Korea) 17:05-17:15 Discussion (Including QnA)