Laser's effect on bone and cartilage change induced by joint immobilization: An experiment with animal model
✍ Scribed by Akai, Masami; Usuba, Mariko; Maeshima, Toru; Shirasaki, Yoshio; Yasuoka, Shozo
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 80 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0196-8092
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✦ Synopsis
Influence of low-level (810nm, Ga-Al-As semiconductor) laser on bone and cartilage during joint immobilization was examined with rats' knee model.
Materials and Methods:
The hind limbs of 42 young Wistar rats were operated on in order to immobilize the knee joint. One week after operation they were assigned to three groups; irradiance 3.9W/cm 2 , 5.8W/cm 2 , and sham treatment. After 6 times of treatment for another 2 weeks both hind legs were prepared for 1) indentation of the articular surface of the knee (stiffness and loss tangent), and for 2) dual energy X-ray absorptiometry (bone mineral density) of the focused regions.
Results and Conclusions:
The indentation test revealed preservation of articular cartilage stiffness with 3.9 and 5.8W/cm 2 therapy. Soft laser treatment has a possibility for prevention of biomechanical changes by immobilization. Lasers Surg. Med.