What is the prevalence and distribution of narrow dysplastic and fully corticalized pedicles in Asian adolescent idiopathic scoliosis patients with major main thoracic curves? A computed tomography (CT) scan analysis of 6494 pedicles.

There were 95.9% pedicles (grades A, B and C) with cancellous channels which can allow pedicle screw fixation and only 4.1% fully corticalized pedicles (grade D) that require an alternative method of fixation. For grade C pedicles (18.5%), pedicle screw can still be attempted with caution. Precautions should also be observed at the L1 and L2 region as the was a transition to narrower pedicles.