Effect of fixed appliance on maxilla during development

Objectives:The fixed orthodontic appliance, such as a lingual arch, was usually utilized to correct teeth for young patients. The first molar as an anchorage was fixed in that position, even during growth. There is no problem to be fixed for short periods. However, for long periods, we still do not understand what effects on the developing jaw bone do happen because of this orthodontic appliance.Consequently, the purpose of this report is to discuss the related effects on the growth and development of young doggs maxilla by wearing fixed appliances. Methods:The subjects were young doggs with complete eruption of primary dentition. They were given two month fixations by the 1mm diameter wire in the quadrangle form between canines and first primary molars on the right and left sides of the maxilla. Then, for distance evaluations, the impressions were taken to plaster models before and after the experiment. The decalcification specimens were also fabricated before and after the experiment for further discussion. Moreover,the movement of bone tissues asobsereved through vital staining dye were also discussed. Results: When cementing by the fixed quadrangle appliance, the development of bone in the lateral sides were restricted. But there were no restrictions in the anteroposterior direction. Conclusion:We should pay attentions to the direction of jaw development while using fixed appliances on developing patients.