Clinical effect of bone-anchored pendulum in treatment for class Ⅱ malocclusion
10.3760/cma.j.issn.1671-0290.2019.03.019
- VernacularTitle:骨支抗摆式矫治器治疗安氏Ⅱ类错牙合的临床效果
- Author:
Baojun LONG
1
;
Dongjie ZHANG
;
Jinmei YE
Author Information
1. 广州市妇女儿童医疗中心口腔科 510120
- Keywords:
Malocclusion;
Angle Class Ⅱ;
Orthotic Devices;
Dental implantation;
Bone-anchored pendulum
- From:
Chinese Journal of Medical Aesthetics and Cosmetology
2019;25(3):238-242
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the clinical effect of bone-anchored pendulum in treatment for class Ⅱ malocclusion .Methods Twelve patients treated by bone-anchored pendulum were chosen .In each patient ,two microscrews were inserted in the anterior paramedian region of the median palatal suture ,6-9 mm posterior to the incisive foramen and 3 – 6 mm lateral to the median line .Pendulum that based on the microscrews was used to distalize maxillary first molar ,and the force applied was 250 g .Skeletal and dental changes were measured on cephalograms before (T1 ) and after (T2 ) distal-ization .Results Class Ⅰ molar relationship had been obtained 7 month after distalization .The aver-age distal movement of the maxillary first molars was 7 .07 mm ,and the inclination was 9 .93° .The second premolars were distalized an average of 5 .44 mm with inclinations of 5 .22° .The first premolars were distalized an average of 4 .09 mm with inclinations of 3 .95° .The maxillary anterior teeth were re-truded 0 .93 mm and palatally inclined 1 .66° .There was statistical difference in that change .Conclusions By the use of microscrew ,pendulum can distalize maxillary molar effectively without mesial move-ment of premolar and labial movement of incisor ,and no loss of dental anchorage is observed during the distal movement .
