title: Alternative to the median region of the palate for placement of an orthodontic implant.
abstract: Tooth-borne anchorage may be one of the greatest limitations of modern orthodontic treatment, because teeth move in response to forces. Previous investigators have placed temporary implants in the median-sagittal palate in order to establish maximum anchorage. This area, however, may be characterized by relatively low vertical bone support. The aim of this study was therefore to find an alternative palatal implant site which offers a higher amount of bone support. This study comprised 22 patients wishing for maximum anchorage underwent presurgical diagnostic evaluation by means of low-dose dental CT. The measuring results regarding vertical bone volume and the position of the neighbouring tooth roots were used as the basis for further treatment. The statistical data analysis indicated an area suitable for implant placement in the group of patients examined. This area was located 6 to 9 mm posterior to the incisive foramen and 3 to 6 mm paramedian, under avoidance of the mid-palatal suture. The patients showed such a great range of variation in vertical bone volume that a preoperative diagnostic evaluation also seems to be recommendable when very short implants are used in order to avoid perforations of the lower nasal duct.
authors.affiliation: Department of Oral Surgery, Dental School, University of Vienna, Waeringerstrasse 25a, A-1090, Vienna, Austria.
authors.forename: T
authors.initials: T
authors.lastname: Bernhart
authors.forename: A
authors.initials: A
authors.lastname: Vollgruber
authors.forename: A
authors.initials: A
authors.lastname: Gahleitner
authors.forename: O
authors.initials: O
authors.lastname: Dörtbudak
authors.forename: R
authors.initials: R
authors.lastname: Haas
mesh_terms: D000293:Adolescent; D000328:Adult; D000539:Alveolar Process / Q000000981:diagnostic imaging; D000704:Analysis of Variance; D002508:Cephalometry; D016001:Confidence Intervals; D003393:Cranial Sutures / Q000000981:diagnostic imaging; D015921:Dental Implants; D017267:Dental Prosthesis Design; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D016018:Least-Squares Analysis; D016014:Linear Models; D008297:Male; D008437:Maxilla / Q000000981:diagnostic imaging; D008875:Middle Aged; D009967:Orthodontic Appliances; D010159:Palate / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D013314:Stress, Mechanical; D013499:Surface Properties; D014057:Tomography, X-Ray Computed; D014087:Tooth Movement Techniques / Q000295:instrumentation*; D014092:Tooth Root / Q000000981:diagnostic imaging
chemical_list: D015921:Dental Implants