The clinical investigation of Quad-Helix appliance in expanding narrow dental arch
- VernacularTitle:Quad-Helix矫治器扩弓疗效的临床研究
- Author:
Hong LIU
;
Yinzhong DUAN
;
Yongsheng DUAN
- Publication Type:Journal Article
- Keywords:
Quad Helix appliance;
Narrow dental arch
- From:
Journal of Practical Stomatology
2001;0(01):-
- CountryChina
- Language:Chinese
-
Abstract:
objective: To evaluate the effect of Quad Helix appliance in expanding narrow dental arch. Methods: 12 cases were treated by Quad Helix appliance. The effect was evaluated by measurement of the dental arch. Results: The dental arch of all the patients was expanded in half a year.The width between the maxillary first molars increased by 8.95 mm, and the width between maxillary first premolars increased by 5.7 mm. The average time of expanding was 20.75 weeks, the expanding efficiency was 0.43 mm per week. Conclusion: Quad Helix is an effective orthodontic appliance for correction of narrow dental arch.
