Objective:To investigate the methods

and clinical therapeutic efficacy of tension band wiring in the treatment of Mayo typeⅡ olecranon fractures in children. Methods:Totally 88 patients of Mayo typeⅡolecranon fractures were enrolled and their clinical data were analyzed retrospectively from June 2008 to October 2015. The patients include 59 male cases and 29 female cases

aged from 6 years old to 15 years old(9.1 years old on average). There are 51 cases of Mayo typeⅡA and 37 cases of Mayo type ⅡB. Faculty training of elbow was carried out after one or two weeks of plaster cast. Results:All cases were followed up. According to Broderg &Morrey score system

Mayo typeⅡA:40 patients were evaluated as excellent

7 as good

4 as fair;the fineness rate was 92.16%. Mayo type ⅡB:22 patients were evaluated as excellent

7 as good

8 as fair;the fineness rate was 78.38%. According to χ2 test

χ2=3.457

P=0.063. According to independent sample t-test:Broderg & Morrey score

t=5.816

P=0.001; elbow flexion degree

t=13.906

P=0.001;elbow stretch degree

t=9.328

P=0.001;pronation degree

t=8.482

P=0.001;supination degree

t=8.876

P=0.001. χ2 test was applied to compare the failure rate of transcortical wire orientation and intramedullary wire orientation

χ2=4.779

P=0.029. Conclusion:With advantages of less epiphyseal injury

stable fixation

early post-operation training

good elbow joint function recovery

tension band wiring is effective in the treatment of Mayo type Ⅱ olecranon fractures in children. Transcortical wire orientation can increase the stability of wires

and reduce the removal of metal obviously. Mayo type can help to guide the treatment and evaluate the prognosis.Strict follow of the operation indication

proper way of operation

and early faculty training can enhance the therapeutic efficacy and reduce complications effectively.