[An experimental investigation between osseointegration and stability of implants used as orthodontic anchorage in dogs].
OBJECTIVE
To investigate the relation between osseointegration and stability of three kinds of implants used as orthodontic anchorage in dogs.


METHODS
HA-coated, titanium coated, and uncoated titanium implants were inserted into each femur of two dogs. After heal period of three months, the orthodontic force of 200 g was applied by means of Ni-Ti springs, which were connected to the two adjacent implants, for two months. The position change of implants was measured and calculated. The shear bond strength of interface between implant and bone was measured with push-test. The interface was observed with scanning electronic microscope.


RESULTS
The distance changes of HA-coated, T-coated and uncoated groups were (-0.50 +/- 1.78) mm, (-0.05 +/- 1.76) mm and (0.29 +/- 1.77) mm, respectively, which showed no statistical difference. The shear strength values were (2.88 +/- 0.55) MPa, (1.89 +/- 0.81) MPa and (2.14 +/- 0.49) MPa, respectively. HA-coated implant contacted with bone closely and the bond strength was the highest. The other two implants were found no significant difference in bond strength.


CONCLUSIONS
The osseointegration was found at the interface among all three kinds of implants and bone and no displacement was found during application of clinical orthodontic force.
Wang
H
H
Department of Prosthodontics, School of Stomatology, West China University of Medical Sciences, Chengdu 610041, China.
Liang
X
X
Tang
S
S
D000818:Animals; D020099:Coated Materials, Biocompatible; D004285:Dogs; D005269:Femur / Q000502:physiology; D020007:Implants, Experimental / Q000592:standards*; D009970:Orthodontics / Q000379:methods*; D016348:Osseointegration / Q000502:physiology*; D014025:Titanium
D020099:Coated Materials, Biocompatible; D014025:Titanium