Abstract: Objective To explore the surgical method of arthroscopic-assisted closed reduction and internal fixation guided by guider for patellar fracture, and compare it with classic open reduction Kirschner wire and wire tension band internal fixation to evaluate its clinical efficacy. Methods From January 2016 to January 2018, 30 cases of arthroscopic assisted patellar fracture closed reduction and cannulated screw internal fixation were completed by using a self-developed patellar closed reduction guide apparatus (arthroscopic assisted closed reduction guide group). From March 2015 to May 2017, 30 cases of traditional open reduction Kirschner wire and steel wire tension band internal fixation were selected (open reduction group). The operation incision size, operation time, postoperative pain score, fracture healing time, Lysholm knee joint score and other evaluation results were compared between the two groups. Results Both groups were followed up for 12 to 18 months. All fractures were healed with a healing rate of 100%. The operation incision size, postoperative pain score, fracture healing time and Lysholm knee joint score index were significantly better in arthroscopic assisted closed reduction guide group than those of open reduction group (P＜0.05). Conclusion Arthroscopic assisted closed reduction hollow nail internal fixation using the closed reduction guider developed by the author has the advantages of minimal invasion and accuration and has good clinical effect compared with the classic open reduction Kirschner wire and wire tension band internal fixation.

Key words: patella, fractures, bone, arthroscopy, fracture fixation, internal, closed reduction guide cannulated screw