IADR Abstract Archives
Osseointegration of LASER modified surface implants with and without hydroxyapatite coating
Objectives: The aim of the present study was to evaluate the osseointegration of implants with the machined surfaces (SU), commercially available surface modified by aluminum oxide blasting followed by acid etching (SJA), modified by LASER beam (SL) and modified by LASER beam with subsequent coating of hydroxyapatite using the biomimetic method without thermal treatment (SLH).
Methods: The surfaces were analyzed using scanning electron microscopy coupled with dispersive energy X-ray spectroscopy (SEM-EDX) prior to surgery. Twenty rabbits randomly received 40 implants in their right and left tibiae, with one implant on each surface in each tibia. Resonance frequency (ISQ) was performed in surgery, and in the periods of 2 and 4 weeks, followed by removal torque of the implants during the analysis periods. The data obtained were subjected to analysis of variance and Tukey's t test (ISQ) and Kruskal-Wallis (biomechanical analysis).
Results: SEM and EDX showed differences in surface topography. There was no statistically significant difference between the groups in the resonance frequency. There was a statistically difference in the removal torque between the SL and SLH group when compared to the SU group in the period of 2 weeks. In the 4-week period, a statistical difference was observed between the 2 experimental surfaces SL and SLH when comparing the SU and SJA surfaces. In the histological analysis, the SL and SLH groups presented bone remodeling in the period of 2 weeks and mature bone in the period of 4 weeks, unlike SU and SJA which presented a delay in repair before the experimental surfaces.
Conclusions: Implants with SL and SLH surfaces showed topographic and biomechanical properties superior to those of SU and SJA surfaces.
Methods: The surfaces were analyzed using scanning electron microscopy coupled with dispersive energy X-ray spectroscopy (SEM-EDX) prior to surgery. Twenty rabbits randomly received 40 implants in their right and left tibiae, with one implant on each surface in each tibia. Resonance frequency (ISQ) was performed in surgery, and in the periods of 2 and 4 weeks, followed by removal torque of the implants during the analysis periods. The data obtained were subjected to analysis of variance and Tukey's t test (ISQ) and Kruskal-Wallis (biomechanical analysis).
Results: SEM and EDX showed differences in surface topography. There was no statistically significant difference between the groups in the resonance frequency. There was a statistically difference in the removal torque between the SL and SLH group when compared to the SU group in the period of 2 weeks. In the 4-week period, a statistical difference was observed between the 2 experimental surfaces SL and SLH when comparing the SU and SJA surfaces. In the histological analysis, the SL and SLH groups presented bone remodeling in the period of 2 weeks and mature bone in the period of 4 weeks, unlike SU and SJA which presented a delay in repair before the experimental surfaces.
Conclusions: Implants with SL and SLH surfaces showed topographic and biomechanical properties superior to those of SU and SJA surfaces.