| Objective: To observe the effect of different stress during fracture healing treating with internal and external fixations and get better curative effect by improving the usage of external fixation, in order to efficacy of the treatment.Method: Study the Tibial fracture patients who were treated in our hospital during the year 2008 and 2010. It is 60 patients in total. 60 cases of Tibial fractures are randomized into three groups: group A(internal fixation group), group B ( no- dynamic external fixtion group), group C(dynamic external fixation group). Group A and B only treat by fracture reduction and fixtion, group C makes external fixation dynamic after 4 weeks'fixation. Periodic follow-up after surgeries, record the result of clinical duration for fracture union,gray value of callus on X-ray and evaluation according to Johner-Wruth classification of Tibial fractures.Result: There are significant deviation between group A and group B in clinical duration for fracture union(A 78.80±7.53,B 71.70±9.14,P<0.05),and gray value of callus on X-ray, the evaluation of group B according to Johner-Wruth classification of Tibial fractures is a bit good than group A(A 90%,B 95%). The clinical duration for fracture union of group C is shorter than group B(B 71.70±9.14,C 54.1±8.95, P<0.001), the change of gray value of callus on X-ray of group C is bigger than group B on the end of the sixth week(B 132.75±6.50,C 138.37±5.28,P<0.01), the evaluation of group C according to Johner-Wruth classification of Tibial fractures is better than group B(16 cases in group B were excellent, 18 cases in group C were excellent, the rates of good effect of group B and C were the same.Conclusion: Make external fixation dynamic could promote bone healing, it's probably relative to the elastic fixation of dynamic external fixztion, the fracture effected by stress continually, and promoted the growth of new bone cell.
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