A clinical study on anchorage control of molar anchoring spring(MAS) during retraction of the maxillary canine.
- Author:
Sun Min KIM
1
;
Joon No RHEE
;
Joon ROW
;
Youn Sic CHUN
Author Information
1. Division of Orthodontics, Department of Dentistry, College of Medicine, Ewha Womans University, Korea.
- Publication Type:Original Article
- Keywords:
Molar Anchoring Spring(MAS);
sliding mechanics;
anchorage control
- MeSH:
Mechanics;
Molar*;
Tooth Movement
- From:Korean Journal of Orthodontics
1998;28(2):269-276
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
In maxillary canine retraction by means of sliding mechanics, we designed MAS(molar anchoring spring) to prevent anchorage loss and uncontrolled tipping of tooth movement and have applied it in clinical cases. The anchorage control of the maxillary first molar and type of tooth movement of the maxillary canine were studied in 31 subjects. The measurements were made on cephalograms, orthopantomograms and dental casts. The obtained results were as follows. 1. In case of the maxillary first molar, there was a little sagittal anchorage loss, but there was no vertical & transverse anchorage loss. 2. In case of the maxillary canine, there was distal tipping movement and also there was a little intrusion tendency.
