Zygoma-gear appliance for intraoral upper molar distalization

Abstract

The aim of this report is to present an intraoral upper molar distalization system supported with zygomatic anchorage plates (Zygoma-gear Appliance, ZGA). This system was used for a 16-year-old female patient with a Class II molar relationship requiring molar distalization. The system consisted of bilateral zygomatic anchorage plates, an inner-bow and heavy intraoral elastics. Distalization of the upper molars was achieved in 3 months and the treatment results were evaluated from lateral cephalometric radiographs. According to the results of the cephalometric analysis, the maxillary first molars showed a distalization of 4 mm, associated with a distal axial inclination of 4.5 o . The results of this study show that an effective upper molar distalization without anchorage loss can be achieved in a short time using the ZGA. We suggest that this new system may be used in cases requiring molar distalization in place of extraoral appliances.

Zygoma-Gear Apareyi ile Maksiller Molar Distalizasyonunun Maksiller Üçüncü Molar Dişler Üzerine Etkileri

“…The appliance used in the present study was firstly produced by Nur et al (9,19) The authors (19) evaluated the dentoalveolar, skeletal and soft tissue effects of the ZGA when used for bilateral distalization of the maxillary molars and they found that maxillary molar distalization without anchorage loss could be achieved in a short time regardless of the age of the patients included to their study. However, the authors (19) did not investigate the effects of maxillary molar distalization on maxillary third molar.…”

“…Headgearin kullanımındaki zorluk, birçok araştırmacıyı molarların distal hareketi için intraoral apareyler ve teknikler geliştirmeye itmiştir (4)(5)(6)(7)(8). Bu teknikler ile maksiller molarlar etkili bir şekilde distalize edilmektedir; fakat çalışmaların çoğunda maksiller keser protruzyonu, overjette artış ve overbite'ta azalma ile karakterize olan ankraj kayıpları kaçınılmaz olmaktadır (9).…”

“…teeth and the inner bow was close to the 1 mm during the distalization if needed. 9 Three weeks after the surgery, a distalization force of 300 g per side was performed via the sentalloy closed coil spring, which was attached with 0.01-in stainless steel ligature. The distalization force was checked and calibrated with a gramforce gauge (Correx; Haag-Streit, Koeniz, Switzerland) during the distalization period.…”

“…Ağız içi arkı, yaklaşık olarak anterior dişlerin 3 mm önünde kalacak şekilde ayarlanarak maksiller birinci molar bantlarındaki headgear tüplerine yerleştirilmektedir. Distalizasyon sırasında anterior dişler ve ağız içi arkı arasındaki mesafe 1 mm' ye yaklaştığında U bükümleri, pir pens ile genişletilerek aparey ayarlanmaktadır (9).…”

“…The difficulty in the use of headgear wear has stimulated many investigators to develop intraoral devices and techniques for the distal movement of molars (4)(5)(6)(7)(8). These techniques effectively distalize the maxillary molars, however, in most of these studies anchorage loss is unavoidable characterized by maxillary incisor protrusion, an increase in overjet, and decrease in overbite (9).…”