Objectives: Modification of titanium implant surface has potential to ensure clinically favorable performance that several surface modification technologies have been introduced. Among the methods, anodizing method and sol-gel hydroxyapatite coating method have gained much interest due to its roughness and chemical composition of the coating layer. The purpose of this study was to compare bone-implant interface shear strength of four different surface treated implants as time elapsed. Resonance frequency analysis (RFA) and removal torque measurement methods were employed to measure implant stability at one week and six week after implantation.
Methods: A total of 80 screw-shaped implant (20 machined, 20 resorbable media blasted (RBM), 20 anodized, and 20 anodized+hydroxyapatite sol-gel coated) were prepared, and one of each group was implanted in the tibia of a New Zealand white rabbit that total 20 of them were used. In order to test the implant stability, each 10 rabbit were sacrificed 1week and 6week later. One-way analysis of variance and the Tukey test were used for statistical analysis.
Results: RFA and removal torque values are shown under the table
|
|
Time |
Machined |
RBM |
Anodized |
Anodized+HA |
|
RFA (ISQ) |
1 week |
56.2(6.6) |
57.2 (8.7) |
61.33 (10.5) |
62.8 (6.7) |
|
6 week |
74.2 (3.1) |
76.5 (4.7) |
74.8 (5.6) |
74.0 (6.9) |
|
|
Removal torque (N/cm) |
1 week |
6.2 (2.4) |
6.9 (3.2) |
7.5 (4.1) |
9.7 (4.6) |
|
6 week |
27.6 (7.8) |
46.9 (7.9) |
69.1 (4.0) |
70.1 (5.1) |