Three-dimensional evaluation of tooth movement in Class II malocclusions treated without extraction by orthodontic mini-implant anchorage / 대한치과교정학회지
The Korean Journal of Orthodontics
;
: 280-289, 2016.
Article
in English
| WPRIM
| ID: wpr-88849
ABSTRACT
OBJECTIVE:
The aim of this study was to analyze tooth movement and arch width changes in maxillary dentition following nonextraction treatment with orthodontic mini-implant (OMI) anchorage in Class II division 1 malocclusions.METHODS:
Seventeen adult patients diagnosed with Angle's Class II division 1 malocclusion were treated by nonextraction with OMIs as anchorage for distalization of whole maxillary dentition. Three-dimensional virtual maxillary models were superimposed with the best-fit method at the pretreatment and post-treatment stages. Linear, angular, and arch width variables were measured using Rapidform 2006 software, and analyzed by the paired t-test.RESULTS:
All maxillary teeth showed statistically significant movement posteriorly (p 0.05) and the intercanine, interfirst premolar, intersecond premolar, and interfirst molar widths increased significantly (2.2 mm, p < 0.01; 2.2 mm, p < 0.05; 1.9 mm, p < 0.01; 2.0 mm, p < 0.01; respectively).CONCLUSIONS:
Nonextraction treatment with OMI anchorage for Class II division 1 malocclusions could retract the whole maxillary dentition to achieve a Class I canine and molar relationship without a change in the vertical position of the teeth; however, the second molars were significantly extruded. Simultaneously, the maxillary arch was shown to be expanded with distal-in rotation of the molars.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Tooth
/
Tooth Movement Techniques
/
Bicuspid
/
Dentition
/
Malocclusion
/
Methods
/
Molar
Limits:
Adult
/
Humans
Language:
English
Journal:
The Korean Journal of Orthodontics
Year:
2016
Type:
Article
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