Double keyhole loop에 의한 상악 6전치의 후방견인시 치아이동양상에 관한 측모두부방사선 계측학적 연구
A Cephalometric study on tooth movement pattern of maxillary 6 anteriors with double keyhole loops
김현경, 박영국,
소속 상세정보
김현경 ( ) - 경희대학교 치과대학 교정학교실
박영국 ( ) - 경희대학교 치과대학 교정학교실
KMID : 0361920020320010009
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 sm, p<0.01).
키워드
Double Keyhole Loop;상악 치아치조 전돌증;6전치 En-masse 후방견인;측모두부방사선사진;Double Keyhole Loop;Maxillary dentoaiveolar protrusion;En-masse retraction of 6 anteriors;Lateral cephalometric evaluation
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