Unilateral maxillary molar distalization with zygoma-gear appliance


Kilkis D., Bayram M. , Celikoglu M. , Nur M.

AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS, cilt.142, 2012 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Cilt numarası: 142 Konu: 2
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1016/j.ajodo.2012.02.026
  • Dergi Adı: AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS

Özet

The aim of this study was to present the orthodontic treatment of a 15-year-old boy with a unilateral maxillary molar distalization system, called the zygoma-gear appliance. It consisted of a zygomatic anchorage miniplate, an inner bow, and a Sentalloy closed coil spring (GAC International, Bohemia, NY). A distalizing force of 350 g was used during the distalization period. The unilateral Class II malocclusion was corrected in 5 months with the zygoma-gear appliance. The maxillary left first molar showed distalization of 4 mm with an inclination of 3 degrees. The maxillary premolars moved distally with the help of the transseptal fibers. In addition, there were slight decreases in overjet (-0.5 mm) and maxillary incisor inclination (-1 degrees), indicating no anchorage loss from the zygoma-gear appliance. Preadjusted fixed appliances (0.022 x 0.028-in, MBT system; 3M Unitek, Monrovia, Calif) were placed in both arches to achieve leveling and alignment. After 14 months of unilateral distalization with the zygoma-gear appliance and fixed appliances, Class I molar and canine relationships were established with satisfactory interdigitation of the posterior teeth. Acceptable overjet and overbite were also achieved. This article shows that this new system, the zygoma-gear appliance, can be used for unilateral maxillary molar distalization without anchorage loss. (Am J Orthod Dentofacial Orthop 2012;142:e1-e7)