Initial orthopaedic displacement compared with longitudinal displacement of the maxilla after a forward force application. An experimental study in dogs.
The aim of this study was to compare the initial orthopaedic displacement of the maxilla in vivo and the longitudinal changes after a forward force application. The sample consisted of five 1-year-old dogs. An anterior force of 5 N on the maxilla was applied by a coil spring system pushing between Brånemark implants and a maxillary splint. The initial displacement of the maxilla after force application was measured by means of speckle interferometry. The longitudinal displacement of the maxilla after a force application during 8 weeks was measured by superimposing standardized lateral cephalograms. The initial, as well as the longitudinal, displacement of the maxilla of the dogs was in a forward direction with some counterclockwise rotation. There was no statistical difference between the initial and longitudinal displacement. The biological response after force application during 8 weeks can be predicted by the initial orthopaedic displacement.
de Pauw
G A
GA
Department of Orthodontics, University of Gent, Belgium.
Dermaut
L R
LR
Verbeeck
R M
RM
D000818:Animals; D002508:Cephalometry; D002858:Chromium Alloys; D000044:Dental Abutments; D003758:Dental Implantation, Endosseous; D004285:Dogs; D007368:Interferometry / Q000379:methods; D007834:Lasers; D008437:Maxilla / Q000033:anatomy & histology*; D009970:Orthodontics / Q000295:instrumentation / Q000379:methods* / Q000706:statistics & numerical data; D013165:Splints; D013997:Time Factors; D014025:Titanium
D002858:Chromium Alloys; D014025:Titanium