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논문 기본 정보

자료유형
학술저널
저자정보
Bui Quang Hung (Kyungpook National University) Mihee Hong (Kyungpook National University) Wonjae Yu (Kyungpook National University) Hee-Moon Kyung (Kyungpook National University)
저널정보
대한치과교정학회 대한치과교정학회지 대한치과교정학회지 제50권 제1호
발행연도
2020.1
수록면
26 - 32 (7page)

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초록· 키워드

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Objective: The Heat Induction Typodont System (HITS), used in some recent studies, has a distinct advantage over previous tooth movement simulation methods. This study aimed to compare inclination and vertical changes between the single-wire and double-wire techniques during en masse retraction with different lengths of lever arms in lingual orthodontics using an upgraded version of the HITS. Methods: Duet lingual brackets, which have two main slots, were used in this study. Forty samples were divided into four groups according to the length of the lever arm (3-mm or 6-mm hook) and the retraction wire (singlewire or double-wire). Four millimeters of en masse retraction was performed using lingual appliances. Thereafter, 3-dimensional–scanned images of the typodont were analyzed to measure inclination and vertical changes of the anterior teeth. Results: Incisor inclination presented more changes in the singlewire groups than in the double-wire groups. However, canine inclination did not differ between these groups. Regarding vertical changes, only the lateral incisors in the single-wire groups presented significantly larger values than did those in the double-wire groups. Combining the effect of hook lengths, among the four groups, the single-wire group with the 3-mm hook had the highest value, while the double-wire group with the 6-mm hook showed the least decrease in crown inclination and extrusion. Conclusions: The double-wire technique with an extended lever arm provided advantages over the single-wire technique with the same lever arm length in preventing torque loss and extrusion of the anterior teeth during en masse retraction in lingual orthodontics.

목차

INTRODUCTION
MATERIALS AND METHODS
RESULTS
DISCUSSION
CONCLUSION
REFERENCES

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