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Year : 2014  |  Volume : 8  |  Issue : 2  |  Page : 50-55

Effect of low power diode laser on mandibular growth (experimental study)

1 Department of Dental Laser Applications, National Institute of Laser Enhanced Sciences, Cairo University, Giza, Egypt
2 Department of Orthodontic, Suez Canal University, Ismailia, Egypt
3 Department of Pathology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
4 Department of Orthodontics, Cairo University, Giza, Egypt

Correspondence Address:
Shereen Mohammed Khattab
Medical Laser Applications, National Institute of Laser Enhanced Sciences, Cairo University, Giza
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0976-2868.145139

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Introduction: Low laser level therapy (LLLT) has a stimulatory effect on bone formation. The aim of this study was to assess the effect of the low laser therapy LLLT on the condylar growth in rabbits. Materials and Methods: The sample consisted of 24 male white New Zealand rabbits with the mean age of 5 weeks and the mean weight of 1.5 kg. LLLT was used for radiation. The sample was divided into two groups: The first group was the control group, which was not subjected to any laser irradiation. The second group was irradiated unilaterally (right side) with was CW 870 nm with power output of 300 mW, energy of 180 J. The spot size was 4 mm circle. The exposure was performed on the temporomandibular joint (TMJ) (a total of 10 min) for 3 sessions/week for 4 weeks. The rabbits in both groups were sacrificed, and the histological evaluation of TMJ was performed to compare the fibro cartilaginous layer, chondrogenic layer and newly formed bone trabeculae. Results: Hyperplasia was observed in the fibro cartilaginous layer associated with hypertrophy in the chondroblasts with excessive newly formed bony trabeculae in the underlying bony structure. Conclusion: Low-level laser (diode) in rabbits enhances mandibular growth by condylar endochondreal bone growth while no increase in the fibrous tissues. The results of this study encourage the use of LLLT during orthodontic treatment as it would provide benefit to patients, allowing them to shorten prolonged treatment.

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