A clinical study on the effect of maxillary incisor torque with controlling root auxiliary arch
10.3969/j.issn.1001-3733.2014.06.011
- VernacularTitle:控根辅弓对上颌切牙转矩疗效的临床研究
- Author:
Yanjun QIN
;
Yueguang GU
;
Ke LIU
;
Jiannan YU
;
Yunjuan SHEN
;
Hong ZHAO
;
Chunyang ZHAO
- Publication Type:Journal Article
- Keywords:
Torque;
Maxillary incisor;
Root control auxiliary arch;
Straight wire appliance
- From:
Journal of Practical Stomatology
2014;(6):787-791
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To explore the torque effect of controlling root auxiliary arch on the straight wire appliance on maxillary anterior teeth.Methods:22 patients with class Ⅱ1 extraction treatment,treated with straightwire appliance,at the detailing treatment stage were treated with controlling root auxiliary arch over the erect or introverted maxillary incisors for positive torque.The main arch wire of 0.46 mm ×0.64 mm stainless steel edge wire was used in 14 cases,the main arch wire of 0.46 mm stainless steel round wire was used in 8 cases.Cephalometric results before and after maxillary incisor torque were analyzed by t test.Results:After maxillary incisor torque in the 22 cases 1-SN and UIa-NA value increased(P ＜0.01),positive torque was achieved by controlling root auxiliary arch on the upper incisors;the round wire maxillary incisor torque worked faster than the edge wire(P ＜0.05).Conclusion:At the detailing stage of treatment straight wire appliance on front teeth,controlling root auxiliary arch is simple and effective in the treatment of exces-sive erect or lingual inclination of maxillary incisor.
