A Cephalometric study on tooth movement pattern of maxillary 6 anteriors with double keyhole loops.
- Author:
Hyun Kyung KIM
1
;
Young Guk PARK
Author Information
1. Department of Orthodontics, College of Dentistry, Kyung Hee University, Korea. ygpark@khu.ac.kr
- Publication Type:Original Article
- Keywords:
Double Keyhole Loop;
Maxillary dentoalveolar protrusion;
En-masse retraction of 6 anteriors;
Lateral cephalometric evaluation
- MeSH:
Adult;
Bicuspid;
Crowns;
Humans;
Lip;
Malocclusion;
Tooth Movement*;
Tooth*
- From:Korean Journal of Orthodontics
2002;32(1):9-18
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
The present study hypothesized that the double keyhole looped archwire plays a positive role for the sake of translatory movement and/or controlled tipping of upper 6 anteriors, and secures anchorage control as well. The purposes of the study were to evaluate the changes in lateral cephalograms during orthodontic treatment with DKHLs and to compare the skeletal & dental changes before- & after-treatment. The materials of this study were lateral cephalograms of 20 adult patients with upper dentoalveolar protrusion both in class I and in class II Division 1 malocclusion. Lateral cephalograms were taken before and after orthodontic treatment with upper 1st bicuspid extraction and DKHLs. The results were obtained as follows: 1. There were no statistically significant differences in skeletal measurement except SNB and PTFH between before- & after-treatment. The major changes were in dentoalveolar region. 2. After treatment, there were statistically significant decrease in dental measurement except interincisal angle. 3. Both upper & lower lip protrusion was decreased. 4. There were statistically differences in upper anterior crown horizontal & root vertical dimension(7.08+/-2.14 mm, 2.38+/-1.15 mm, p<0.01). 5. There were statistically differences in upper posterior dental(both crown & root) horizontal dimension(2.48+/-0.99 mm, 2.05+/-0.91 mm, p<0.01).
