الفهرس | Only 14 pages are availabe for public view |
Abstract The present study was carried out to evaluate and compare two efficient techniques in accelerating orthodontic tooth movement.16 female patients were divided randomly into two equal groups, the first group received surgical corticotomy as a gold standard group while the second group received surgical corticotomy assisted with low level laser therapy in attempt for further acceleration of orthodontic tooth movement. Assessment of the rate of canine retraction through split mouth technique was carried out via series of dental models every 1 month. CBCT images were used to evaluate the total distance traveled by the maxillary canine, 1st molar anchorage loss, tipping, rotation and torque of both maxillary canine and 1st molar after 4 months of canine retraction on both sides. No statistical significant difference was found between both interventions as regards the total distance traveled by the maxillary canine at the end of the 4 month study. Similarly, the rate of canine retraction recorded every 4 weeks follow up period showed statistical non-significant difference on both intervention sides. Moreover, no difference was found in amount of molar anchorage loss or in any CBCT variables assessing tipping, torque and rotation of maxillary canine and 1st molar. Root resorption assessment showed statistically non-significant difference between the two groups. from the results of the present study, the following conclusions can be drawn: Within the limitation of this study: 1. Low level laser therapy combined to corticotomy could not achieve a higher rate of canine retraction compared to the golden standard corticotomy technique alone. 2. The canines in both sides showed significant distal tipping, palatal root torque and distopalatal rotation upon retraction. The addition of low level laser therapy to corticotomy did not affect the degree of tipping, torque and rotation of the upper canines as no significant difference was found between both sides. 3. More bodily movement of the canine occurred on intervention side (corticotomy+ low level laser therapy) where the total distance travelled by the canine root apex and center were significantly greater in the intervention side (corticotomy+ low level laser therapy) than the comparator side (corticotomy alone). 4. Significant first molar mesial tipping occurred within the comparator group (corticotomy alone), while it was insignificant in the intervention group (corticotomy+ low level laser therapy). However, the difference between both sides was statistically insignificant. First molar palatal root torque and rotation were minor and varied insignificantly in both sides. |