Rapid canine retraction in a Class II bialveolar protrusion case using a lingually extended distraction screw.
- Author:
Kwang Seok AHN
1
;
Euk JOO
;
Ju Young PARK
;
Young Kyu RYU
;
In Ho CHA
;
Kee Joon LEE
Author Information
1. Department of Orthodontics, Yonsei University, Seoul, Korea.
- Publication Type:Case Report
- Keywords:
Rapid canine retraction;
Periodontal distraction;
Lingually extended distraction screw;
Anterior protrusion
- MeSH:
Axis, Cervical Vertebra;
Female;
Humans;
Osteogenesis;
Osteogenesis, Distraction;
Periodontal Ligament;
Plastics;
Tooth Movement
- From:Korean Journal of Orthodontics
2006;36(4):308-320
- CountryRepublic of Korea
- Language:English
-
Abstract:
Rapid canine retraction, first introduced by Liou, is a distraction osteogenesis applied to the periodontal ligament tissue. Rapid tooth movement was facilitated by establishing minimal bony resistance on the distal surface of the canine by socket preparation and by osteogenesis on the mesial side in response to the periodontal distraction. Since undesired buccal tipping or extrusion of the canine during retraction tends to occur, it is crucial to maintain the firm path of movement and the axis of the canine during retraction. In order to improve the predictability of the canine movement, lingually extended distraction screws with heavy labial guiding wires were designed. Prefabricated plastic canine models for the estimation of socket depth and miniscrew implants for anchorage reinforcement were also devised. Applying these devices to a female patient with Class II anterior protrusion, the whole treatment was effectively finished in 13 months. Loss of vitality or periodontal problems did not occur throughout treatment, and stable occlusion was maintained during 10 months of retention. This case report demonstrates that a predictable rapid canine retraction can be achieved through the use of this modified technique.
