The Studies Of Animal Experiment About The External Fixation Device Of The Link And The Kirschner Wire's Diameter In Different Match

Objective:Observes the Ilizarov technology to apply in the leg of sheep lengthens of the process,when the kirschner wire obtain invariable stress and the link and the kirschner wire's diameter in different match.Observe bone formation is faster from the study of imageology histology and vitodynamics.It can provide the biological mechanics,s aspect to support when the body Lengthens using the Ilizarov technology.Method:Using the different diameter needles drill through three group of the different diameter external fixation device on the nine leg of sheep.Sum total nine groups,After using the self-made pressurizer device pressurizes the kirschner wire.It makes the leg of sheep slow extension by 1cm/d speed after a week of operation,when the length of the extend section is 1.5cm to keep 20d.Identify bone formation is faster and the bone's hardness is better in which match from the study of imageology histology and vitodynamic.Result:Observe the density of bony callus,the intensity of bone and the bone trabecular density from the 5 successful lengthen external fixation device,we can see that the extend effect of the big link is better than the small one.the extend effect of the small diameter's needle is better than the big one,the most important influence of the extend effect is the diameter of the needle,Conclusion:when using the Ilizarov technology on the external body' s limb elongation,when the link of the external fixation device' s diameter constant,the kirschner wires diameter is smaller,the bone formation rate of the extend section is faster,the bony callus' is higher. when the kirschner wire's diameter constant,the link of the external fixation device's diameter is bigger,the bone formation rate of the extend section is faster,the bony callus' is higher. both of the kirschner wire's diameter and the external fixation device' s diameter's change can effect the bone formation rate of the exten section.the effect of the kirschner wire' s diameter' s change is bigger,the Conclusion is same to before.