レーザーの骨再生促進効果に関する光学的側面からの検討

抄録

This experiment was designed to approach the bone regeneration effect of lasers from the viewpoint of the optical aspect. METHOD: The extracted leg bones of a pig was applied as the experimental model for a living body. Argon ion laser, HeNe laser and GaAlAs laser of low power level of the output were applied in this experiment. The surface of the bone model was exposed to each laser beam and the sectional aspect of the bone was observed by the CCD video camera during the laser irradiation. In addition to this, these VTR images were processed to the scanning profiles of the laser intensity. RESULTS OBTAINED: Every beam of the 3 kinds of lasers was diffusively transmitted the cortical bone and infiltrated into the bone-marrow effectively. Ar⁺ L. and GaAlAs L. beams were absorbed effectively in a bone-marrow (especially in a reddish bone-marrow) and did not infiltrat into the bone-marrow so deeply. HeNe L., however, was comparativiely infiltrative into the bone-marrow to the Ar⁺ L. and the GaAlAs L.. The laser beams were spattered more in a yellowish bone-marrow than a reddish bone-marrow. The periostium was proved not to intercept the laser beam so much. CONCLUSION: Ar⁺ L. and GaAlAs L. are comparatively absorbed in the surface of a bone. On the contrally HeNe L. is comparatively infiltrates diffusively into the bone-marrow. The results of this experiment fully suggests that Ar⁺ L. or GaAlAs L. may be suitable for a comparatively superficial bone focuses and HeNe L. may be suitable for a deep bone focuses.