Evaluation of maxillary protraction in treatment of skeletal class Ⅲ malocclusions in early mixed dentition
- VernacularTitle:前方牵引矫治替牙早期骨性安氏Ⅲ类错的疗效评估
- Author:
zhi-fang, CAI
;
jian-guo, WANG
;
min, HOU
- Publication Type:Journal Article
- Keywords:
protraction;
early mixed dentition;
skeletal classⅢ malocclusions;
hard tissue
- From:Journal of Shanghai Jiaotong University(Medical Science)
2006;0(07):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the outcomes of maxillary protraction in the treatment of skeletal class Ⅲ malocclusions in early mixed dentition. Methods Fourteen patients with skeletal class Ⅲ malocclusions in early mixed dentition were treated with maxillary protraction for one year with oral active appliance bonded face mask.Cephalometric records were analyzed to assess the changes of maxillo-facial structure of the hard tissue before and after treatment. Results The anterior crossbite was unlocked in all the patients,and the maxilla moved downwards and forwards.Point A moved forwards,and angle SNA and ANB significantly increased.The mandible rotated downward and backward,and the Wits values significantly increased,which led to the correction of a skeletal class Ⅲ relationship.Maxillary length and protrusion significantly increased,and facial profile improved obviously. Conclusion Maxillary protraction works well in the treatment of skeletal class Ⅲ malocclusions in early mixed dentition,and can reduce the chances of later orthognathic surgery.
