关键词: Delaire面弓, 固定矫治器, 恒牙列早期, 前牙反牙合

Abstract:

Objective To determine the clinical effect of Delaire and fixed appliance in treating crossbite of labial teeth during the early permanent dentition. Methods A total of 32 patients with crossbite of labial teeth in the early permanent dentition were treated by using Delaire and Edgewise appliance. Cephalometric radiographs were taken before and after the treatment. At the end of the treatment Down analysis was used for evaluation， and the indices compared. Results Thirty-two patients completed the treatment;30 cases were completely successful with crossbite removed and normal overbite of labial teeth gained， the growth of maxilla was accelerated apparently， and that of the mandible was limited. The upper incisors and the lower molars hardly extruded. Conclusion Delaire and Edgewise appliance adopted in crossbite of labial teeth in the early permanent dentition period and shorten the treatment course and visits are reduced and therapeutic effects are significantly improved. It is an ideal orthopedic technique for crossbite teeth in the early permanent dentition period.

Key words: Delaire , Edgewise appliance, early permanent dentition period, crossbite of libial teeth