OBJECTIVETo discuss arthroscopic technique of double-root line double tunnel fixation for tibial intercondylar ridge avulsion fracture and its short-term followvup observational results.

METHODSFrom May 2012 to June 2017, 21 cases of tibial intercondylar ridge avulsion fractures were treated with arthroscope double line double tunnel. Among the patients, 16 males and 5 females were ranging in age from 17 to 45 years old, with an average of 29.6 years old, and injury to surgery time 3 to 6 days, with an average of 3.6 days. All the patients underwent arthroscopic exploration, fracture reduction, double root line fixation. The knee function was assessed at 3 and 6 months postoperatively using the Lysholm knee score, and the healing and resection of the patients were followed by X-ray examination.

RESULTSAll patients were followed up for 7 to 23 months, with an average of 12.8 months. All patients after fracture were bone healing, knee activity were gained their previous normal levels (ranged, 0° to 130 °), and no limb dysfunction. The average scores of Lysholm knee were(93.52±7.10) and(95.95±6.34) points in 3 months and 6 months after operation.

CONCLUSIONSArthroscopic treatment of tibial intercondylar ridge avulsion fractures with double root line is simple and reliable, and can provide an ideal internal fixation method for tibial intercondylar ridge avulsion fractures.