Résumé
Background: Today’s community is becoming more concern with the aesthetics and therefore orthodontics is coming into focus. With increasing numbers of patients receiving orthodontic treatment and with increased expectations, the adverse consequences of treatment should be emphasized. External apical root resorption is an iatrogenic consequence of orthodontic treatment, although it can also occur in the absence of orthodontic treatment. Thus every dental practitioner and orthodontist should know the risk factors of root resorption, so that he or she can do everything to reduce the occurrence of root resorption. Methodology: The study was consisted of 50 participants including of general dental practitioners and orthodontists. Study was carried out with the help of specially designed 12 questionnaires, which were validated by doing pilot study. Results: In the present study, 88% participants had knowledge about the fact of orthodontic root resorption and about 31% had come across such situations in their practice. Many of the participants were not having the knowledge of the etiological and other factors associated with the condition. Conclusion: Results of the present study were shown that, though root resorption induced by the orthodontic treatment is commonly seen among the community, many of them were not aware of the sufficient knowledge, attitude and practice towards this adverse situation.
Résumé
BACKGROUND: Icari n as one of the main components of Epimedium has an inhibitory effect on osteoclasts.. OBJECTIVE: To further investigate the influence of icariin on the root absorption of the maxil ary first molar at mesial part during orthodontic treatment in rats. METHODS: Orthodontic root resorption models were established in the left maxil a of rats. Local injection of 200 mg/kg icari n (icari n group) or normal saline (positive control group) was administrated into the left first molar buccal periosteum. The right maxil a of rats served as negative control group that was treated with neither appliance nor drug injection. The mesial distance between bilateral first molars and the contralateral maxil ary incisor was measured before and after the appliance was placed. Mesial surface of the mesial root of bilateral maxil ary first molars was observed using scanning electron microscope. RESULTS AND CONCLUSION: Mesial movement of the maxil ary molars in the icari n group was significantly less than that in the positive control group (P < 0.05). Under the scanning electron microscope, smal absorption lacunae were scattered in the icari n group, while the positive control group showed a large amount of absorption lacunae and they were interconnected into a sheet, showing a stark contrast with the smooth root surface of the negative control group. It is indicated that icari n can inhibit root resorption caused by orthodontic treatment, while reducing the amount of mesial movement of the molar under corrective force.