Objective To compare patellar ring,Kirschner wire tension band and patellar ring plus Kirschner wire in fixation for treatment of patella fractures.Methods A retrospective analysis was conducted on the 285 patients with patellar fracture who had been treated between September 2009 and January 2016.They were 155 men and 130 women,with an average age of 45.5 years (from 18 to 70 years).Their fractures included 176 transverse,28 longitudinal split and 81 comminuted ones.They were divided into 3 groups according to their different internal fixation methods:patellar ring fixation (98 cases),Kirschner wire tension band (92 cases),patellar ring plus Kirschner wire fixation (95 cases).The 3 groups were compared in terms of operative time,intraoperative bleeding,fracture healing time,knee function by B(o)stman score at the last follow-up and postoperative complications.Results The operative time in the patellar ring group(58.9 ±6.4 min) was significantly shorter than in the Kirschner wire group (71.8 ± 7.8 min) and in the patellar ring plus Kirschner wire group (74.4 ± 8.0 min) (P ＜ 0.05).There were no statistical significant differences between the 3 groups in fracture healing time and intraoperative bleeding (P ＞ 0.05).The good to excellent rate of knee function at the last follow-up in the Kirschner wire tension band group was 100.0％ (92/92),significantly higher than in the patellar ring group (90.8％,89/98) and in the patellar ring plus Kirschner wire group (91.6％,87/95) (P ＜ 0.017).There was no significant difference in postoperative complication rate between the patellar ring fixation group (2.0％,2/98),Kirschner wire tension band fixation group (1.1％,1/92) and the patellar ring plus Kirschner wire group (2.1％,2/95) (P ＞ 0.05).Conclusion Internal fixation with Kirschner wire tension band has definite curative effect on patellar fractures,showing the advantages of less operative invasion,fewer postoperative complications,better functional recovery of the affected knee joint,and lower price over the other 2 internal fixation methods.

ObjectiveTo compare the clinical effect of percutaneous iliosacral screws osteosynthesis (PISO) and open reduction internal reconstruction plate fixation in treating unstable pelvic fractures combined with sacroiliac joint dislocation,and evaluate their safety and practicality.MethodsFrom March 2004 to October 2010,37 patients with vertical unstable pelvic fractures were admitted to our department.Twenty cases were treated with percutaneous sacroiliac screw fixation and 17 cases were performed opened reduction and internal reconstruction plate fixation under C-arm X-ray's guide.The perioperative parameters and postoperative imaging indexes were compared and analyzed.ResultsAll patients were followed up for 6 months to 26 months,with an average of 15 months.There were statistical significances between the PISO group and open reduction internal fixation group in operation time,blood loss,postoperative pain,mean fever time and hospital stay.The two groups showed no significant difference on postoperative X-evaluation of reduction effect.The average healing time was 3.2 months and the difference was not statistically significant between two groups.PISO group had no complications such as infection,bent nails or broken nails.ConclusionThrough compared and analyzed the two groups in treating unstable pelvic fractures,the percutaneous sacroiliac screw fixation has been proved for a kind of ideal minimally invasive surgery method because of locating exactly,less damage and blood loss,milder pain and quicker recovery.But it demands higher operation techniques.Adequate preoperative preparation and postoperative patients' cooperation can reduce complications incidence.The second group of anterior reconstruction plate or T-shape plate to fix vertically unstable pelvic fractures at same time shows a good result of stabilization.