Clinical effects of pendulum and straight wire technology in patients with fully erupted maxillary second molar
10.3760/cma.j.issn.1671-0290.2012.02.001
- VernacularTitle:摆式矫治器加直丝弓技术治疗第二恒磨牙完全萌出后的效果
- Author:
Jiayu ZHAI
;
Ke CHEN
;
Liqin DENG
;
Jinmei YE
;
Jie JIANG
;
Ying ZHANG
;
Hongtao WANG
- Publication Type:Journal Article
- Keywords:
Angle class Ⅱ malocclusion;
Pendulum;
Maxillary second molar
- From:Chinese Journal of Medical Aesthetics and Cosmetology
2012;18(2):81-85
- CountryChina
- Language:Chinese
-
Abstract:
ObjectiveTo investigate the clinical effect of pendulum and straight wire technology in patients with fully erupted second molar.MethodsPatients with Angle class Ⅱ malocclusion were chosen.Control group included patients without erupted second molar.Experimental group included patients with completely erupted second molar.Pendulums were used in two groups to distalize maxillary molars.Then straight wire orthodontic treatment had been performed until treatment was over.Cephalograms of each stage were analyzed.ResultsIn the experimental group,mesiobuccal cusp of first molar was distalized for 4.62 mm,geometric center was distalized for 3.75 mm,about 81 percent of the movement of mesiobuccal cusp.In control group,mesiobuccal cusp of first molar was dis talized for 5.78 mm,geometric center was distalized for 3.20 mm,about 55 percent of the movement of mesiobuccal cusp.It turned out first molar was distalized in both groups,but more rotation took place in control group than that in the experimental group.ConclusionsPendulum can distalize maxillary first and second molars in patients with completely erupted second molar.The pendulum and straight wire technology can treat these patients successfully.
