Objective To investigate the clinical effect of arthroscopy-assisted percutaneous cannulated screw fixation for Ideberg Ⅲ glenoid fractures.Methods A retrospective case series study was conducted to analyze the clinical data of 28 patients with Ideberg Ⅲ glenoid fracture admitted to the Honghui Hospital Mfiliated to Medical College of Xi'an Jiaotong University from January 2014 to January 2017.There were 19 males and nine females,aged 20-49 years [(32.5 ± 3.5)years].All patients were classified as Ideberg Ⅲ glenoid fractures.All patients were treated with arthroscopy-assisted percutaneous cannulated screw fixation.The length of incision,complications and range of motion of shoulder joint were recorded.The shoulder function was evaluated by University of California at Los Angeles (UCLA) score and visual analogue score (VAS) before and after operation.Results All patients were followed up for 24-36 months [(25.6-± 4.5) months].The incision ranged from 2.0 cm to 3.7 cm [(2.3 ± 0.8) cm].No infection,re-displacement or nonunion occurred.One year after operation,the results of range of motion were as follows:anterior flexion (160.7 ± 5.5)°,abduction (150.8 ± 6.8)°,and external rotation (38.4 ± 7.5) °.The mean UCLA score was increased from preoperative (7.2 ± 1.2) points to (33.5 ± 3.2) points (P ＜ 0.05),and the mean VAS score was decreased from preoperative (7.8 ± 3.2) points to (1.3 ± 0.5) points (P ＜ 0.05).Conclusion For Ideberg Ⅲ glenoid fractures arthroscopyassisted percutaneous cannulated screw fixation can relieve the pain and reduce complications,which is beneficial to the recovery of shoulder function.