Fig. 5From: Design a novel integrated screw for minimally invasive atlantoaxial anterior transarticular screw fixation: a finite element analysisA New AATS Model. a Threaded structures at both ends. b Porous metal structure in the middle. c Internal annular solid cylinder with an outer diameter of 3 mm and an inner diameter of 1 mm (for guide wire positioning). B New AATS. C New AATS in atlantoaxial modelBack to article page