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Improved osseointegration and interlocking capacity with dual acid‐treated implants: a rabbit study
Author(s) -
Halldin Anders,
Jimbo Ryo,
Johansson Carina B.,
Gretzer Christina,
Jacobsson Magnus
Publication year - 2016
Publication title -
clinical oral implants research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.407
H-Index - 161
eISSN - 1600-0501
pISSN - 0905-7161
DOI - 10.1111/clr.12507
Subject(s) - osseointegration , microstructure , implant , titanium , biomedical engineering , materials science , surface roughness , rabbit (cipher) , dentistry , medicine , composite material , surgery , metallurgy , mathematics , statistics
Aim To investigate how osseointegration is affected by different nano‐ and microstructures. The hypothesis was that the surface structure created by dual acid treatment ( AT ‐1), applied on a reduced topography, might achieve equivalent biomechanical performance as a rougher surface treated with hydrofluoric acid ( HF ). Materials and methods In a preclinical rabbit study, three groups (I, II , and III ) comprised of test and control implants were inserted in 30 rabbits. The microstructures of the test implants were either produced by blasting with coarse (I) or fine ( II ) titanium particles or remained turned ( III ). All test implants were thereafter treated with AT ‐1 resulting in three different test surfaces. The microstructure of the control implants was produced by blasting with coarse titanium particles thereafter treated with HF . The surface topography was characterized by interferometry. Biomechanical (removal torque) and histomorphometric (bone–implant contact; bone area) performances were measured after 4 or 12 weeks of healing. Results Removal torque measurement demonstrated that test implants in group I had an enhanced biomechanical performance compared to that of the control despite similar surface roughness value (S a ). At 4 weeks of healing, group II test implants showed equivalent biomechanical performance to that of the control, despite a decreased S a value. Group III test implants showed decreased biomechanical performance to that of the control. Conclusions: The results of the present study suggest that nano‐ and microstructure alteration by AT ‐1 on a blasted implant might enhance the initial biomechanical performance, while for longer healing time, the surface interlocking capacity seems to be more important.