title: Orthodontic skeletal anchorage using a palatal external plate.
abstract: We have developed the Anchor-Lock external plate system, which is fitted on the palate for the purpose of orthodontic skeletal anchorage. The aim of this study was to introduce the Anchor-Lock and assess its success rate. The Anchor-Lock is composed of titanium screws of 2·0-mm diameter and a titanium plate of 1·0-mm thickness. The external plate is rigidly interlocked with the heads of the screws, which are implanted trans-mucosally into palatal bone. Three types of Anchor-Lock are available. These were applied to 137 orthodontic patients (104 females and 33 males) aged 10-54 years. Two types of plate were used, a straight-shaped plate applied to the hard palate and to the anterior palate and a double-Y-shaped plate applied after tooth-borne rapid maxillary expansion. Success rate of the Anchor-Lock was 92·0% overall. No significant difference in success rate was found by age or sex of patients. Type or screw length of the Anchor-Lock did not affect success rate significantly. Success rate was significantly increased by the use of the surgical stent. The Anchor-Lock was effectively applied to distalize and/or intrude the upper molars. The Anchor-Lock system appears suitable for clinical use as an alternative to conventional screw- and plate-type orthodontic implants.
authors.affiliation: Department of Orthodontics, Yokohama Residency Training Center, Kanagawa Dental University, Tsuruya-cho 3-31-6, Kanagawa-ku, Yokohama, Kanagawa 221-0835, Japan fushima@kdu.ac.jp.
authors.forename: Masaru
authors.initials: M
authors.lastname: Kobayashi
authors.forename: Kenji
authors.initials: K
authors.lastname: Fushima
mesh_terms: D000293:Adolescent; D000328:Adult; D001860:Bone Plates; D001863:Bone Screws; D002648:Child; D003764:Dental Materials / Q000737:chemistry; D005260:Female; D006801:Humans; D008297:Male; D008312:Malocclusion, Angle Class II / Q000628:therapy; D008437:Maxilla / Q000601:surgery; D008875:Middle Aged; D052280:Orthodontic Anchorage Procedures / Q000295:instrumentation* / Q000379:methods; D016382:Orthodontic Appliance Design; D010155:Palatal Expansion Technique / Q000295:instrumentation; D021362:Palate, Hard / Q000601:surgery; D015607:Stents; D014025:Titanium / Q000737:chemistry; D014087:Tooth Movement Techniques / Q000295:instrumentation; D016896:Treatment Outcome; D055815:Young Adult
chemical_list: D003764:Dental Materials; D014025:Titanium
keywords: Skeletal anchorage; external plate; palatal implant; success rate; temporary anchorage