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Proceedings Paper

Stimulatory effect of low-level GaAlAs laser (808 nm) on bone defect created surgically in rabbit femur
Author(s): Qiushi Li; Zhou Qu
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Paper Abstract

Recently, low-level laser therapy (LLLT) has been reported to have a photobiomodulation effect on bio-tissues. Our aim was to evaluate the effect of low level GaAlAs laser on bone regeneration around bone defect sites created surgically in rabbit femur. Thirty rabbits were randomly divided into an experimental and a control groups. A GaAlAs semiconductor diode laser was applied in the experimental group( λ = 808nm, P =75mW, (symbol) =0.4mm,t=5min, ρE=28J/cm2)immediately after surgery once a day for 3 consecutive days with no irradiation in the control group. Rabbits were sacrificed on the 7th, 14th, 21th days after surgery (DAS) and femur samples were prepared for bone histomorphometry analysis. The results showed that the bone volume, the osteoid volume, osteoblast surface and the mineral apposition rate in the laser group were higher statistically (P<0.05) than those indices in the control group at different periods. These data revealed that LLLT can enhance bone regeneration. LLLT seems to have a clinical application in promoting bone healing around implant in the future.

Paper Details

Date Published: 28 August 2009
PDF: 8 pages
Proc. SPIE 7382, International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, 73820Q (28 August 2009); doi: 10.1117/12.835041
Show Author Affiliations
Qiushi Li, Jilin Univ. (China)
Zhou Qu, Armor Technique Institute of PLA (China)

Published in SPIE Proceedings Vol. 7382:
International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging
Farzin Amzajerdian; Chun-qing Gao; Tian-yu Xie, Editor(s)

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