title: Hard palate deformation in an animal model following quasi-static loading to stimulate that of orthodontic anchorage implants.
abstract: The aim of the present investigation was to identify adequate implant treatment for young patients. In an animal model palate deformation was investigated by acute quasi-static loading. Three series of tests (with newborn, young and adult pigs) were performed, each with two groups (one or two-point stress) and 5-7 animals per group. Discs with a diameter of 3 and 5 mm were placed in group 1 in the suture area, and in group 2 at both the right and left sides of the suture. Deformation was analysed by a computerized three-dimensional (3D) photo-imaging evaluation system. In young animals the one-point load at a significantly lower force level led to fractures in comparison with the two-point load (P < 0.001). Similar results were measured by an increase in the size of one disc from 3 to 5 mm (P < 0.001). In contrast, adult pigs showed stable results with both methods. In general, a larger disc diameter led to less instability. The one-point load seems to be suitable for adult animals, whereas a two-point load might be favourable during ossification. The advantage of the two-point load is the generation of a higher stress and therefore improved control of dental fixation. However, further tests are necessary to investigate the long-term effects.
authors.affiliation: Department of Orthodontics, Technical University Dresden, Germany.
authors.forename: T
authors.initials: T
authors.lastname: Gedrange
authors.forename: C
authors.initials: C
authors.lastname: Köbel
authors.forename: W
authors.initials: W
authors.lastname: Harzer
mesh_terms: D000367:Age Factors; D000818:Animals; D000831:Animals, Newborn; D003393:Cranial Sutures / Q000502:physiology; D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D007091:Image Processing, Computer-Assisted; D021621:Imaging, Three-Dimensional; D007572:Jaw Fractures / Q000503:physiopathology; D023421:Models, Animal; D016382:Orthodontic Appliance Design; D009967:Orthodontic Appliances; D010012:Osteogenesis / Q000502:physiology; D021362:Palate, Hard / Q000502:physiology*; D013223:Statistics as Topic; D013314:Stress, Mechanical; D013552:Swine; D014087:Tooth Movement Techniques / Q000295:instrumentation*; D016474:Weight-Bearing
chemical_list: D015921:Dental Implants