An experimental investigation between osseointegration and stability of implants used as orthodontic anchorage in dogs
Wang, H.; Liang, X.; Tang, S.
Zhonghua Kou Qiang Yi Xue Za Zhi 35(2): 99-101
2000
ISSN/ISBN: 1002-0098 PMID: 11780496 Document Number: 513346
To investigate the relation between osseointegration and stability of three kinds of implants used as orthodontic anchorage in dogs. 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. 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. 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.