Asymmetrical distalization of maxillary molars with zygomatic anchorage, improved superelastic nickel-titanium alloy wires, and open-coil springs.
BACKGROUND
In nongrowing patients with skeletal Class II malocclusion, premolar extraction or maxillary distalization can be used as camouflage treatment. Zygomatic anchorage enables distalization in uncooperative or noncompliant patients. We describe 1 such procedure in a 24-year-old woman.


METHODS
We used novel improved superelastic nickel-titanium archwires combined with nickel-titanium open-coil springs to provide a constant and continuous low force to the dentition.


RESULTS
We were able to successfully eliminate the protrusive profile and correct the Class II molar relationship using this system of zygomatic anchorage. The posterior occlusal relationships were improved to achieve Class I canine and molar relationships on both sides, and ideal overbite and overjet relationships were established. Facial esthetics was improved with decreased protrusion of the upper and lower lips.


CONCLUSIONS
The method used here is a promising alternative to traditional distalization techniques and might offer an effective and simple means of distalizing maxillary molars in uncooperative patients.
Assistant professor, Orthodontic Science, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan. Electronic address: takaorts@tmd.ac.jp.
Takayoshi
T
Ishida
Hyung Sik
HS
Yoon
Takashi
T
Ono
D001860:Bone Plates; D002508:Cephalometry; D003722:Dental Alloys; D004548:Elasticity; D005146:Facial Asymmetry / Q000150:complications / Q000628:therapy; D005260:Female; D006801:Humans; D008312:Malocclusion, Angle Class II / Q000150:complications / Q000628:therapy*; D008437:Maxilla; D008963:Molar; D009532:Nickel; D052280:Orthodontic Anchorage Procedures; D016382:Orthodontic Appliance Design; D009969:Orthodontic Wires; D057887:Overbite / Q000150:complications / Q000628:therapy; D014025:Titanium; D014061:Tongue Habits / Q000009:adverse effects / Q000628:therapy; D014087:Tooth Movement Techniques / Q000379:methods*; D055815:Young Adult; D015050:Zygoma / Q000601:surgery
D003722:Dental Alloys; C040654:titanium nickelide; D009532:Nickel; D014025:Titanium