Preliminary investigation of Tip-Edge Plus technique in the treatment of Class Ⅲ malocclusion
10.3760/cma.j.issn.1002-0098.2009.10.004
- VernacularTitle:Tip-Edge Plus直丝弓技术矫治Ⅲ类错(牙合)的临床初探
- Author:
Li-Li CHEN
1
;
Jiu-Xiang LIN
;
Tian-Min XU
Author Information
1. 华中科技大学同济医学院附属协和医院
- Keywords:
Orthodontic appliances;
Malocclusion;
Angle Class Ⅲ;
Straight-wire appliance;
Mandibular protrusion
- From:
Chinese Journal of Stomatology
2009;44(10):588-593
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the craniofacial and occlusal changes of Class Ⅲ cases treated with Tip-Edge Plus Technique.Methods Thirteen Class Ⅲ patients(6 girls and 7 boys,mean age 14.9 years)with mandibular protrusion were selected.All the patients were four premolar extraction cases and treated with Tip-Edge Plus technique.Cephalometric analysis was performed to evaluate the changes before and after treatment.Results After treatment,Wits changed from(-2.50±1.40)mm to (-1.00±0.85)mm and ANB changed from(-0.61±1.41)°to(1.31±1.66)°(P＜0.05).UL-E and LL-E were decreased significantly from(7.55±1.24)mm to(4.82±1.05)mm and from(10.16±2.43)mm to(6.03±2.01)mm respectively(P＜0.01).The incisors were retracted.A remarkable soft tissue change was noted after the treatment.The difiefence between the distance of the upper lip and lower lip to SnPg'at the beginning of treatment changed from(-1.57±1.24)mm to(0.62±1.24)mm (P＜0.01).FCA changed from(2.62±1.53)°to(7.02±2.21)°.Conclusions With Tip-Edge Plus straight-wire technique and light continuous force,anterior teeth could be tipped distally and lingually quickly.The hard and soft tissues changed accordingly.
