Spatial changes of the upper dentition following en-masse space closure: A comparison between first and second premolar extraction / 대한치과교정학회지
Korean Journal of Orthodontics
;
: 371-380, 2005.
Article
in Korean
| WPRIM
| ID: wpr-651467
ABSTRACT
The purpose of this experimental study was to evaluate and compare maxillary arch dimensional and positional changes between first and second premolar extraction groups. The Calorific Machine was used to illustrate tooth movement in three dimensions. The experimental teeth except the first or second premolars were embedded in artificial alveolar bone. The extraction space was closed using arch wires with bull loops into which 15 degree gable bends were placed. Before and after space closure, radiographs were taken in the sagittal and occlusal directions using occlusal films. The results showed greater mean maxillary incisor retraction and less anchorage loss in the maxillary first premolar extraction group than in the maxillary second premolar extraction group. Mesiopalatal rotation of anchor teeth was greater after extraction of a maxillary second premolar than a maxillary first premolar (p<.001).
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Tooth
/
Tooth Movement Techniques
/
Bicuspid
/
Decompression Sickness
/
Dentition
/
Incisor
Language:
Korean
Journal:
Korean Journal of Orthodontics
Year:
2005
Type:
Article
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