✦ LIBER ✦

Effects of rapid pulsed CO2 laser beam on cortical bone in vivo

✍ Scribed by Ghazi M. Rayan; Denver T. Stanfield; Sandy Cahill; Stanley D. Kosanke; Joseph A. Kopta

Publisher: John Wiley and Sons
Year: 1992
Tongue: English
Weight: 690 KB
Volume: 12
Category: Article
ISSN: 0196-8092
DOI: 10.1002/lsm.1900120608

No coin nor oath required. For personal study only.

✦ Synopsis

Twenty rabbit femurs were used to study the effect of CO, laser on cortical bone. Sixteen femurs were treated with 20 watts, 3 mm defocused beam, 2 KHZ spike pulse mode CO, laser for 10 seconds through a circular window in the metaphysis. In four control femurs, the inner cortex was exposed without laser treatment. The animals were killed at 4 and 6 weeks and the specimens studied histologically. All laser-treated specimens showed thermal changes. Three histological zones were observed. A superficial zone of inner cortex close to the beam consisted mainly of carbonization or carbon ash during resorption. An intermediate zone consisted of bone necrosis and healing with associated areas of new bone formation. The deep zone of outer cortex had normal bone with no cellular damage. No such changes were observed in the control specimens. The CO, laser can be used to generate a controlled zone of tissue ablation, which may make it a potentially useful tool for tumor margin cauterization.

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