Abstract: Objective：The aim of this study was to investigate the three-dimensional anatomy characteristics of parotid duct system. Methods：The CBCT sialography data from 34 healthy people were reconstructed by Mimics software to test and analysis duct length, the types of branch duct and so on. Results：The mean length of the parotid main ducts in 34 cases was 52.67±10.68 mm. The rate of occurrence of the accessory parotid gland was 41.3% (14/34), and the mean angle was 47.73 ° between the accessory parotid ducts and the main ducts. The 25 cases exhibited Bifurcation ducts at the end of the main ducts, the mean angle was 73.30°±20.70° between two bifurcation ducts; 74 lateral parotid ducts with a mean angle of 58.22 ° attached to the main ducts. Conclusions：The main parotid ducts are thick and smooth. The terminal of the main ducts usually separate two bifurcation ducts. And the main parotid ducts can separate some lateral parotid ducts.

Key words: parotid duct, anatomical characteristics, three-dimensional reconstruction, parotid gland, morphological characteristics