The effect of ultrasonic waves (low intensity ultrasound) during periodontal surgery on bone cell activity of mandible in dog Download PDF

Background: One of the main goals of treatment of periodontal disease is preservation of alveolar bone in order to survive the teeth. It is believed that stimulating osteoblast cells activity and preventing osteoclastic activity of bone cells during the treatment process, rebuild the bone structure. The positive effect of low intensity ultrasound on the bone cells activity has been approved. Therefore, the use of ultrasound devices is an effective method to accelerate the treatment process of bone deterioration diseases and fractures. Material and method: present study was conducted as pilot study on two dogs. Orthodontic o rings were used to create periodontitis in cervical of molars on the light and left sides of mandible for 4 weeks. Debridement and Root planning were performed on the right side of mandible (control group) with manual tip and on the left side of it (target group) with Piezo tip (mectron-20mW⁄〖cm〗^2 ). After debridement on the left side, Piezo tip was moved on the bone to stimulate bone cells activity for 10 minutes. After 14 days, the bone of the right and left sides of mandible was sampled from sample1. Sampling was conducted on sample 2 after 21 days. Results: the results of present study showed that low intensity ultrasound cannot statistically have positive or negative effects on regeneration of bone, including the number of osteoblasts and osteoclasts, vascularity, formation of collagen fibers, inflammatory cell infiltration, callus formation, evidences of bone remodeling and presence of mature cartilage (p0.05). Conclusion: according to the results, it seems that in order to achieve more accurate and more confident results about the priority of each of these methods, designing and performing complementary studies with larger sample sizes are necessary.