Background: In the presence of chin-on-chest deformity of ankylosing spondylitis,
positioning for extension osteotomy of the spine is a challenging endeavor. Conventional …

Study Design. Technical note. Objective. To demonstrate a controlled extension osteotomy
technique of the cervical spine in a prone position and using the head elevator mechanism …

The authors present a technical note for a prone positioning system developed to facilitate
cervical extension osteotomy for ankylosing spondylitis in the presence of severe deformity …

Background: Chin-on-chest deformity is a disabling manifestation of ankylosing spondylitis.
Surgical treatment consists of extension osteotomy at the cervicothoracic junction. The …

Purpose of review: Cervical spine surgery is often indicated in patients with ankylosing
spondylitis, most often for stabilization of fractures or correction of deformity. Operating on …

Study Design. A retrospective review of clinical and radiologic outcome in 13 consecutive
patients with Ankylosing Spondylitis (AS) who underwent cervical osteotomy for correction of …

Study Design. A retrospective review of the cervical extension osteotomy in the past 36
years for the treatment of flexion deformity of patients with ankylosing spondylitis was …

The correction of chin-on-chest deformity is challenging and requires combined anterior and
posterior approaches to the cervical spine. The authors describe a cervical osteotomy …

Ankylosing spondylitis can produce severe fixed flexion deformity in the cervical spine. This
deformity may be so disabling that it interferes with forward vision, chewing, swallowing and …

Objective To introduce a self-designed adjustable operation frame and explore the feasibility
and safety in the treatment of severe kyphosis secondary to ankylosing spondylitis with …