Fig. 1From: The correlations between the anchor density and the curve correction of adolescent idiopathic scoliosis surgeryLow-density, Middle-density and High-density screw constructs. a: A patient with Lenke 1 AIS received posterior fusion of T4-L1 with a low-density construct (Anchor density = 1.20) of pedicle screw instrumentation. b: A patient with Lenke 1 AIS received posterior fusion of T4-L1 with a middle-density construct (Anchor density = 1.60) of pedicle screw instrumentation. c: A patient with Lenke 1 AIS received posterior fusion of T4-T12 with a high-density construct (Anchor density = 1.78) of pedicle screw instrumentationBack to article page