Journal of Japanese Society for Laser Dentistry
Online ISSN : 2185-6702
Print ISSN : 0917-7450
ISSN-L : 0917-7450
Fundamental Study of KrF Excimer Laser
The First Report: The Effect on Rat's Femur by Changing of Freguency
Makoto ISOBEHidenori MATSUSHITALKenji YOSHIDAMasahiko FUKAYAKatsuhiko SATO
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1992 Volume 3 Issue 1 Pages 13-17

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Abstract

Recently, lasers operating at shorter and shorter wavelengths have become available. The excimer laser emits pulses of ultraviolet wavelengths. The KrF excimer laser has high incision efficiency, and can cut bone tissue without thermal damage.
An incision was made on the rats femur by laser at pulse energy: 50mJ, beam spot: 0.3mm, pulse width: 15ns, peak power: 3.3MW, energy density: 78J/cm2, incision speed: 4mm/ min, irradiation time: 30s, and frequency: 5, 10, 20, 40Hz. The femurs were examined histopathologically 1, 2 and 4 weeks after the operation.
At all laser settings the femurs had a layer of thermal damage around the cortical bone. In the case of the femurs examined at the postoperative 4 th week, the new bone did not connect with the cortical bone.

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