A new clinical trial in the bite-raising : The usage of the reaction of torque on the posterior teeth

NDL Digital Collections 12 References
  • NODA,Takao
    The First Department of Orthodontics, Faeulty of Dentistry, Tokyo Medical and Dental University
  • YAMAGATA,Mariko
    The First Department of Orthodontics, Faeulty of Dentistry, Tokyo Medical and Dental University
  • SOMA,Kunimichi
    The First Department of Orthodontics, Faeulty of Dentistry, Tokyo Medical and Dental University

Bibliographic Information

Other Title
  • 咬合挙上法に対する一考案 : 臼歯部トルクの反作用を利用して

Search this article

Description

An easy and convenient bite-raising technique using the reaction of torque on the posterior teeth was performed in a woman with the protrusion of the maxillary anterior teeth as her chief complaint. Her characteristics were 6.0 mm. overjet and 5.0 mm. overbite. The maxillary first premolars and the mandibular second premolars were extracted and the SWA multi-bracket technique was used for the treatment. The active treatment time was 2 years and 11 months, and the anterior retraction phase was achieved by means of the travelling arch, 0.016"×0.022" stainless steel wire. During that phase, the crowns of the posterior teeth were bucally directed by the 13°third order bend. The reaction occurring at the time of the insertion to the brackets was used as the intrusive force on the anterior teeth. The validity of this technique performed in such case was investigated by the measurement of the intrusive force. In the deep-bite case, the SWA brackets were bonded and the stainless steel rectangular wire was set on the 〓. Three types of the third order bend performed on the crowns of the posterior teeth were -15°(bucally), 0°and +15°(lingually). Each of the intrusive force applied on the anterior teeth were measured during the mouth-opening and the maximum occluding stages. According to such investigation, it was revealed that the intrusion of the anterior teeth was able to be achieved by the usage of the reaction of torque on the posterior teeth. Additionally, the intrusive force was found to be increased more in the maximum occluding stage than in the mouth-opening stage ; hence, it was concluded that this method may have good effect and result in the treatment of the deep-bite with strong occlusal force cases.

Journal

References(12)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top