AIM:The study was conducted to evaluate the effect of combined low energy laser application and Micro-Osteoperforations versus the effect of the application of each technique separately on the rate of orthodontic tooth movement.PATIENTS AND METHODS:Three parallel groups (each group contained 10 patients) were performed; Group A: In which one side was controlled side, and the other side received micro-osteoperforations (MOPs), Group B: In which one side was controlled side, and the other side received low-level laser therapy (LLLT), Group C: In which one side was controlled side, and the other side received both MOPs and LLLT.RESULTS:Significant statistical differences were obvious in the rate of canine retraction between each intervention and the control sides as following; the MOPs increased the rate of canine retraction by 1.6 fold more than the control side, LLLT increased the rate of canine retraction by 1.3 fold than the control side, and combination of both techniques resulted in an increase in the rate of canine retraction by 1.8 fold more than the control side.CONCLUSION:Combination of MOPs and LLLT proved to be more efficient regarding increasing the rate of canine retraction than the application of each technique separately.
AIM: This study aims to evaluate the accuracy and reliability of Kinect motion sensing input device’s three-dimensional (3D) models by comparing it with direct anthropometry and digital 2D photogrammetry.
MATERIALS AND METHODS: Six profiles and four frontal parameters were directly measured on the faces of 80 participants. The same measurements were repeated using two-dimensional (2D) photogrammetry and (3D) images obtained from Kinect device. Another observer made the same measurements for 30% of the images obtained with 3D technique, and interobserver reproducibility was evaluated for 3D images. Intraobserver reproducibility was evaluated. Statistical analysis was conducted using the paired samples t-test, interclass correlation coefficient, and Bland-Altman limits of agreement.
RESULTS: The highest mean difference was 0.0084 mm between direct measurement and photogrammetry, 0.027 mm between direct measurement and 3D Kinect’s models, and 0.018 mm between photogrammetry and 3D Kinect’s. The lowest agreement value was 0.016 in the all parameter between the photogrammetry and 3D Kinect’s methods. Agreement between the two observers varied from 0.999 Sn-Me to 1 with the rest of linear measurements.
CONCLUSION: Measurements done using 3D Images obtained from Kinect device indicate that it may be an accurate and reliable imaging method for use in orthodontics. It also provides an easy low-cost 3D imaging technique that has become increasingly popular in clinical settings, offering advantages for surgical planning and outcome evaluation.
The aim of the study is to detect the changes happed on the surface of the mini-screw regarding bone deposition and ions deposited on the surface after retraction of the canine tooth.Patient and method: This study was performed over 10 patients, each one received 2 machined titanium mini-screws in the upper arch between the first molar and second premolar for retraction of canine tooth. After retraction of canine the left side was removed (group 1) and the right side was left in place unloaded until treatment finished then removed (group 2) . The two groups were transferred for scanning electron microscopy to analyze the changes happened on the surface regarding bone and ions deposited on the surface.Results: group 2 samples showed huge differences than group 1 regarding bone deposition on the surface and deposition of calcium and phosphorus ions. Group 2 showed higher bone deposition (3.466 %) than group 1 (0.034%), and in group 2 higher calcium and phosphorous deposition which equal 3.754 , 2.954 mass% respectively than calcium and phosphorus in group 1 which equal 1.949 , 1.606 mass % respectively. Conclusion: using titanium alloy mini-screws for a long term contact with the bone and body fluids result in alteration on the surface, calcium and phosphorus deposition and randomly organized bony tissue osteointegrated on the surface in spite of smoother surface. This bony tissue formation might be enhanced by extended period of retention of mini-screw inside the alveolar bone.
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