Abstract: Objective　To design a personalized guide device for coracoclavicular ligament reconstruction and to evaluate its drilling accuracy and efficiency.　Methods　A personalized guide device for coracoclavicular ligament reconstruction was designed by using computer-aided design software and 3D printing. Ninety human shoulder specimens were obtained and randomly assigned into free-hand, C-ring and personalized groups for transclavicular-transcoracoid drilling with minimally invasive incisions. The surgical duration, the tunnel location zones and distances from the tunnel edge to the coracoid’s medial and lateral edges were measured.　Results　The surgical duration in the freehand group, the C-ring group and the personalized group were (203±33) s, (267±62) s, and (155±14) s, respectively. There were 13, 28 and 30 coracoid tunnels of the three groups located in the ideal middle zone, respectively. The absolute differences between distances from the tunnel edge to the coracoid’s medial and lateral edges in the three groups were (3.7±2.0) mm, (2.0±0.9) mm, and (0.9±0.5) mm, respectively. The differences were all statistically significant. Conclusion　The personalized guide device achieved higher drilling accuracy and efficiency, which is a new choice for transclavicular-transcoracoid drilling in coracoclavicular ligament reconstruction with minimally invasive incisions. 

Key words: Acromioclavicular joint dislocation, 　Coracoclavicular ligament reconstruction, 　Guide device, 　Computer aided design, 　3D printing