Abstract: Objective　To explore the morphological classification and the clinical significance of the angulus superior scapulae based on CT three-dimensional reconstruction.　Methods　The CT three-dimensional reconstruction of scapular was classified according to the morphological characteristics. Reference points: A, the angulus superior scapulae; B, the lowest point of the scapular notch; C, the intersection between the scapula and the inner margin of the scapula; D, the vertical point of the point A on the line CE; E, the spinoglenoid notch; F, the lowest point of the subscapular angle. Parameters studied: the thickness of point A; the distance of AB, AC and AD; the angle of ∠A (the angle between the straight line AB and the straight line AC); the angle of ∠ACF in sagittal plane; the angle of ∠ACF in coronal plane.　Results　Under the CT three-dimensional reconstruction, the superior scapulae was classified into three types: Hilly type 48%, ∠A =(93.76±7.69)°; Mountain peak type 47%, ∠A=(86.69±6.23)°; and Chimney type 5%, ∠A =(85.33±7.10)°. Among them,the thickness of point A of Hill type and Chimney type was thinner than Mountain peak type (P<0.05). For the distance of AB, AC, AD and the angle of ∠A, ∠ACF (Coronal plane), there were statistical differences between Hill type and Mountain peak type (P<0.05). For the distance of AD and the angle of ∠A, there were statistical differences between Hill type and Chimney type (P<0.05).　Conclusion　Under the CT three-dimensional reconstruction, the superior scapulae is classified into three types: Hilly type, Mountain peak type and Chimney type. Different types of superior scapulae may have a potential effect in neck pain and the levator muscle syndrome.

Key words: Angulus superior scapulae, 　CT three-dimensional reconstruction, 　Neck pain, 　Levator muscle syndrome