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

Yonsei Medical Journal 2020년 61권 4호 p.323 ~ 330
황창주 ( Hwang Chang-Ju ) - Ulsan University College of Medicine Asan Medical Center Scoliosis Center

백종민 ( Baik Jong-Min ) - Gachon University College of Medicine Gil Medical Center Department of Orthopedic Surgery
조재환 ( Cho Jae-Hwan ) - Ulsan University College of Medicine Asan Medical Center Scoliosis Center
 ( Yoon So-Jeong ) - Ulsan University College of Medicine Asan Medical Center Scoliosis Center
이동호 ( Lee Dong-Ho ) - Ulsan University College of Medicine Asan Medical Center Scoliosis Center
 ( Lee Choon-Sung ) - Ulsan University College of Medicine Asan Medical Center Scoliosis Center

Abstract


Purpose: 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.

Materials and Methods: 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.

Results: 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.

Conclusion: 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.

키워드

Adolescent idiopathic scoliosis; pedicle screw; high-density; posterior-only surgery
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