title: Y Shape Osteotomy in Ankylosing Spondylitis, a Prospective Case Series with Minimum 2 Year Follow-Up.
abstract: The aim of the study is to evaluate the efficacy of a spinal osteotomy technique, Y shape osteotomy, for correcting kyphosis in AS patients planned preoperatively with computer software-assistance. 36 consecutive AS patients with thoracolumbar kyphosis were treated with one-stage posterior Y shape osteotomy and preoperative surgical planning was done with the aid of the Surgimap Spine. Radiological parameters of simulation and immediate postoperation were documented. Clinical and radiological results were evaluated in the preoperative, the early postoperative periods and during the last follow-up. The lumbar lordosis was found as 40.7 ± 4.1 degrees in the surgical planning and 49.7 ± 3.9 degrees postoperatively (p<0.01). PI-LL was 3.8± 0.9°in the simulation procedure and 6.6± 1.5°postoperatively (p<0.01). At the final follow-up, Global sagittal balance was restored and Both Oswestry Disability Index and Scoliosis Research Society scores improved largely. In conclusion, Y shape osteotomy is a safe and effective treatment option for AS patients with kyphosis deformity.
authors.affiliation: Department of Orthopedics, Chinese PLA General Hospital, Beijing, People's Republic of China.
authors.forename: Wenhao
authors.initials: W
authors.lastname: Hu
authors.affiliation: Department of Renal cancer and Melanoma, Peking University Cancer Hospital, Beijing, People's Republic of China.
authors.forename: Jiayi
authors.initials: J
authors.lastname: Yu
authors.affiliation: Department of Orthopedics, Chinese PLA General Hospital, Beijing, People's Republic of China.
authors.forename: Huawei
authors.initials: H
authors.lastname: Liu
authors.affiliation: Department of Orthopedics, Chinese PLA General Hospital, Beijing, People's Republic of China.
authors.forename: Xuesong
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Department of Orthopedics, Chinese PLA General Hospital, Beijing, People's Republic of China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Wang
mesh_terms: D000328:Adult; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007738:Kyphosis / Q000150:complications / Q000000981:diagnostic imaging / Q000601:surgery*; D008141:Lordosis / Q000150:complications / Q000000981:diagnostic imaging / Q000601:surgery; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging / Q000601:surgery; D008297:Male; D008875:Middle Aged; D010027:Osteotomy / Q000379:methods*; D011446:Prospective Studies; D011859:Radiography; D013131:Spine / Q000000981:diagnostic imaging / Q000601:surgery*; D013167:Spondylitis, Ankylosing / Q000150:complications / Q000000981:diagnostic imaging / Q000601:surgery*; D013904:Thoracic Vertebrae / Q000000981:diagnostic imaging / Q000601:surgery