The Incidence of Screw Failure in Fenestrated Polyaxial Pedicle Screws vs. Conventional Pedicle Screws in the Treatment of Adolescent Idiopathic Scoliosis (AIS).

: Adolescent idiopathic scoliosis (AIS) is a spinal pathology affecting 0.47-5.2% of the population, often requiring surgical intervention to control deformity progression.