Posterior Correction of Adolescent Idiopathic Scoliosis with High-Density Pedicle Screw-Only Constructs: 5 Years of Follow-Up

• Published in: Yonsei medical journal Vol. 61; no. 4; pp. 323 - 330
• Main Authors: Hwang, Chang Ju, Baik, Jong-Min, Cho, Jae Hwan, Yoon, So Jeong, Lee, Dong-Ho, Lee, Choon Sung
• Format: Journal Article
• Language: English
• Published: Korea (South) Yonsei University College of Medicine 01.04.2020; 연세대학교의과대학
• Subjects: Adolescent; Female; Follow-Up Studies; Humans; Male; Original; Pedicle Screws; Radiography; Recovery of Function; Retrospective Studies; Scoliosis - complications; Scoliosis - surgery; Spinal Fusion - methods; Thoracic Vertebrae - diagnostic imaging; Thoracic Vertebrae - surgery; Tomography, X-Ray Computed; Treatment Outcome; Young Adult; 의학일반; pedicle screw; Adolescent idiopathic scoliosis; high-density; posterior-only surgery
• ISSN: 0513-5796; 1976-2437; 1976-2437
• DOI: 10.3349/ymj.2020.61.4.323

This study aimed to analyze radiological outcomes in patients with adolescent idiopathic scoliosis (AIS) who underwent posterior correction with high-density pedicle screw-only constructs. We hypothesized that high-density pedicle screw-only constructs in AIS would provide a high correction rate and would facilitate the maintenance of the correction or obviate the loss thereof. We retrospectively analyzed radiological outcomes over a minimum follow-up period of 5 years in patients with AIS who underwent posterior correction with high-density pedicle screw-only constructs. A total of 124 consecutive patients were included. Demographic data, including age, sex, operated fusion level, numbers of screw, Lenke curve type, Risser stage, and follow-up period were retrospectively collected from electronic medical records and radiological measurements including serial follow-up. The average number of pedicle screws was 1.96/vertebra. The average curve correction was 48.3% for the proximal thoracic (PT) curve, 83.1% for the main thoracic (MT) curve, and 80.2% for the thoracolumbar/lumbar (TL/L) curve at final follow-up. Use of high-density pedicle screw-only constructs helped achieve excellent correction rates, with no significant loss of correction at final follow-up. We obtained excellent correction rates of 48.3% for PT, 83.1% for MT, and 80.2% for TL/L curves using high-density pedicle screw-only constructs in AIS, with no significant loss of correction at final follow-up.