アブストラクト（38巻1号：The Bulletin of Kanagawa Dental College）

The Bulletin of Kanagawa Dental College

English

Title　： Severe Class II Division 1 Crowding Malocclusion Treated without Extraction or Orthognathic Surgery - Clinical Evaluation of Mandibular Condylar Position using TMJ Radiographs -
Subtitle　： CASE REPORT
Authors　： Yoshiharu Aoyagi1), Hiroo Oda1),2)
Authors（kana）　：
Organization　： 1)fuga Orthodontics Office, 2)Division of Orthodontics, Department of Comprehensive Dentistry, Yokohama Clinical Education Center of Kanagawa Dental College
Journal　： The Bulletin of Kanagawa Dental College
Volume　： 38
Number　： 1
Page　： 19-34
Year/Month　： 2010 / 3
Article　： Report
Publisher　： Kanagawa Odontological Society
Abstract　： [Abstract] In orthodontic treatment, it is important to evaluate the mandibular condylar position. Considerable research has been carried out on the temporomandibular joint (TMJ) and the mandibular condyle. The growth adaptation of the mandible is also an important factor that affects the outcome of orthodontic treatment for Class II malocclusion. In this case study, TMJ radiographs at the intercuspal position (ICP) and mandibular rest position (MRP) were used to determine the growth adaptation of the mandible and to evaluate the prognosis for post-treatment stability. A bite plate, bi-helix, headgear, and multi-bracket appliances were used to correct the premolar scissors bite and an excessive curve of Spee, as well as to provide growth adaptation of the mandible. The TMJ radiographs showed that at the MRP, the mandibular condyle was anterior to the ICP in the mandibular fossa. After orthodontic treatment, there was an improvement in Class II occlusion, including crowding, during adolescent growth without need of extraction or orthognathic surgery. Comparing the TMJ radiographs of the ICP and MRP before and after orthodontic treatment is an effective way to evaluate the positional adaptation of the condyle in Class II malocclusion.
Practice　： Dentistry
Keywords　： Class II division 1, TMJ radiograph, Condyle position, Functional appliance, Adolescent growth