弱二氧化碳激光照射对骨折愈合作用的研究

Study of Low-power CO_2 Laser Irradiation on Fracture Healing in Rabbits

以ＣＯ２激光不同功率密度照射：Ａ组１５０ｍＷ／ｃｍ２、Ｂ组１００ｍＷ／ｃｍ２、Ｃ组５０ｍＷ／ｃｍ２，观察对兔骨折愈合的作用．结果：Ａ、Ｂ组骨折处Ｘ线片所见显著优于对照组；Ａ、Ｂ组骨折初期的血清羟脯氨酸浓度，骨折３５天生物力学抗扭强度及骨痂钙含量均显著高于对照组；骨折３５天骨痂胶原含量各组差异无显著性；Ｃ组与对照组差异无显著性，Ａ与Ｂ组间差异也无显著性。表明，１５０ｍＷ／ｃｍ２和１００ｍＷ／ｃｍ２的ＣＯ２激光照射对骨折愈合有促进作用，而５０ｍＷ／ｃｍ２对骨折愈合无明显作用。

In the paper,we used the different power density of CO2 laser to treat the radius fracture in rabbits.Then the effect of CO2 laser with three kinds of power density (150mW/cm2,100mW/cm2 and 50mW/cm2)to rabbits'fracture was examined according to the index of roentgenogram,serum hydroxyproline,biochanical anti-torsion strength,the collagen and calcium content in callus.The result showed that the in-dex of serum hydro-xyproline, biochanical anti-torsion strength and calcium content of callus in group A(radiated by 150mW/cm2)and group B(radiated by 100mW/cm2)was significantly higher than that of control group. However,the collagen content of callus wasn't difference among these groups. It is suggested that the CO2 laser with 150mW/cm2 and 100mW/cm2 irradiation could stimulate the fracture healing, but the 50mW/cm2 power density has not this effect.