Email updates

Keep up to date with the latest news and content from Scoliosis and BioMed Central.

Open Access Highly Accessed Open Badges Research

Segmental correction of adolescent idiopathic scoliosis by all-screw fixation method in adolescents and young adults. minimum 5 years follow-up with SF-36 questionnaire

Ching-Hsiao Yu1, Po-Quang Chen2*, Shu-Chuang Ma2 and Chee-Huan Pan2

Author Affiliations

1 Department of Orthopaedic Surgery, Tao-Yuan General Hospital, No.1492, Zhongshan Rd, Taoyuan City 330, Taiwan, (R.O.C

2 Department of Orthopaedic Surgery, National Taiwan University Hospital, No. 7. Chung San South Road, Taipei 100, Taiwan

For all author emails, please log on.

Scoliosis 2012, 7:5  doi:10.1186/1748-7161-7-5

Published: 19 February 2012



In our institution, the fixation technique in treating idiopathic scoliosis was shifted from hybrid fixation to the all-screw method beginning in 2000. We conducted this study to assess the intermediate -term outcome of all-screw method in treating adolescent idiopathic scoliosis (AIS).


Forty-nine consecutive patients were retrospectively included with minimum of 5-year follow-up (mean, 6.1; range, 5.1-7.3 years). The average age of surgery was 18.5 ± 5.0 years. We assessed radiographic measurements at preoperative (Preop), postoperative (PO) and final follow-up (FFU) period. Curve correction rate, correction loss rate, complications, accuracy of pedicle screws and SF-36 scores were analyzed.


The average major curve was corrected from 58.0 ± 13.0° Preop to 16.0 ± 9.0° PO(p < 0.0001), and increased to 18.4 ± 8.6°(p = 0.12) FFU. This revealed a 72.7% correction rate and a correction loss of 2.4° (3.92%). The thoracic kyphosis decreased little at FFU (22 ± 12° to 20 ± 6°, (p = 0.25)). Apical vertebral rotation decreased from 2.1 ± 0.8 PreOP to 0.8 ± 0.8 at FFU (Nash-Moe grading, p < 0.01). Among total 831 pedicle screws, 56 (6.7%) were found to be malpositioned. Compared with 2069 age-matched Taiwanese, SF-36 scores showed inferior result in 2 variables: physical function and role physical.


Follow-up more than 5 years, the authors suggest that all-screw method is an efficient and safe method.

Adolescent idiopathic scoliosis (AIS); All-screw method; SF-36 questionnaire