title: Long-term stability of maxillary group distalization with interradicular miniscrews in a patient with a Class II Division 2 malocclusion.
abstract: We successfully treated a Class II Division 2 patient with maxillary group distalization using interradicular miniscrews. A woman, aged 28 years 11 months, had a convex profile and an excessive overjet caused by a skeletal Class II jaw-base relationship. After leveling and alignment, titanium miniscrews were obliquely implanted between the maxillary second premolar and first molar. To distalize the maxillary dentition, nickel-titanium closing coil springs with a 2-N load were placed between the screws and the hooks on the archwire. After 28 months of active orthodontic treatment, a proper facial profile and an acceptable occlusion were achieved with a 4-mm distalization of the maxillary dentition. The resultant occlusion was stable throughout a 5-year retention period. Interradicular miniscrews were useful to distalize the maxillary dentition for correcting a Class II malocclusion. This new strategy, group distalization with miniscrews, can make the treatment simpler with greater predictability.
authors.affiliation: Associate professor, Department of Orthodontics and Dentofacial Orthopedics, Institute of Biomedical Sciences, Graduate School, Tokushima University, Tokushima, Japan.
authors.forename: Shingo
authors.initials: S
authors.lastname: Kuroda
authors.affiliation: Postgraduate student, Department of Orthodontics and Dentofacial Orthopedics, Graduate School of Oral Sciences, Tokushima University, Tokushima, Japan.
authors.forename: Natsuko
authors.initials: N
authors.lastname: Hichijo
authors.affiliation: Postgraduate student, Department of Orthodontics and Dentofacial Orthopedics, Graduate School of Oral Sciences, Tokushima University, Tokushima, Japan.
authors.forename: Minami
authors.initials: M
authors.lastname: Sato
authors.affiliation: Postgraduate student, Department of Orthodontics and Dentofacial Orthopedics, Graduate School of Oral Sciences, Tokushima University, Tokushima, Japan.
authors.forename: Akiko
authors.initials: A
authors.lastname: Mino
authors.affiliation: Private practice, Amagasaki, Japan.
authors.forename: Nagato
authors.initials: N
authors.lastname: Tamamura
authors.affiliation: Private practice, Okayama, Japan.
authors.forename: Mitsuhiro
authors.initials: M
authors.lastname: Iwata
authors.affiliation: Professor and chair, Department of Orthodontics and Dentofacial Orthopedics, Institute of Biomedical Sciences, Graduate School, Tokushima University, Tokushima, Japan; distinguished adjunct professor, King Abdulaziz University, Jeddah, Saudi Arabia. Electronic address: etanaka@tokushima-u.ac.jp.
authors.forename: Eiji
authors.initials: E
authors.lastname: Tanaka
mesh_terms: D000328:Adult; D001863:Bone Screws; D005260:Female; D006801:Humans; D008312:Malocclusion, Angle Class II / Q000628:therapy*; D008437:Maxilla; D013997:Time Factors; D014087:Tooth Movement Techniques / Q000295:instrumentation*; D016896:Treatment Outcome