Documentation Summaries - Implantium & Medical Company

Purpose:
In the present study, calcium phosphate was coated on titanium dental implant by IBAD, the properties of the thin
films were analyzed, and the biological effects of the coatings on bone and soft tissue response were evaluated.
Material and Methods:
Each rabbit received four implants of two different treatments either as-machined surface, or as-blasted surface,
or calcium phosphate coating on machined surface. The implants were grit blasted with TiO2 particles for blasted
surface. The two implants with identically treated surfaces were inserted in the same leg 10 mm apart. After 12 weeks
post implantation,the distal implants of each condition were unscrewed with a torque gauge instrument, and the
proximal ones were preserved for the histomorphometric study.
Results:
The average bond strength of the as-deposited film is higher than other vacuum processed coatings. Biological evaluation
showed that the calcium phosphate coatings promote more osteoblasts and fibroblasts to proliferate. The thin calcium
phosphate coatings on the machined implants required a higher removal torque (48.5±5.4 Ncm), approximately 1.5 times
than the as-machined ones (32.3±2.91 Ncm). Calcium phosphate coated implants showed slightly higher removal torque
force than sandblasted implants (47.3±5.8 Ncm), but no statistical difference was obtained between the two materials.
Fig 1.Bonding strength of coating layers according to coating methods Fig 2. Removal torque force
Conclusion:
In vivo experiments demonstrated that calcium phosphate coating on implants could improve bone-to-metal
contact and removal torque force between bone and implant surfaces.
Surface Treatment 40