IADR Abstract Archives
Cp-Ti or Ti6Al4V Implants With or Without Laser Modified Surface
Objectives: This study aimed to evaluate the biological and mechanical behavior of peri-implant bone tissue in implants manufactured in cp-Ti or Ti6Al4V with machined surfaces (CPMS or ALLOYMS) and modified by LASER beam (CPLS or ALLOYLS).
Methods: The surfaces were analyzed using scanning electron microscopy coupled with X-ray dispersive energy spectroscopy (SEM-EDX) prior to experimental surgery and after removal of the implants. Ninety-six (2x4mm) implants were installed in surgical beds milled in the right and left tibias of 48 male Wistar rats, one implant of each material (metal) or surface installed in each tibia. Biomechanical analysis was performed using the implant removal torque in all groups in the periods of 14, 21 and 42 days postoperatively and the tibiae were processed for histological analysis. The data obtained in the biomechanical analysis were submitted to statistical analysis (p<0.05).
Results: The SEM-EDX before the installation of the implants showed a difference between the surfaces machined and modified by LASER beam, regardless of the metal of the implant. The removal torque of ALLOYLS was statistically higher than CPLS, CPMS and ALLOYMS in 14 and 21 days (p<0.05), as well as CPLS was statistically higher than CPMS and ALLOYMS. In 42 days CPLS and ALLOYLS showed statistical differences when compared to CPMS and ALLOYMS (p<0.05). The SEM-EDX of the removed implants showed total bone coverage on the surfaces of CPLS and ALLOYLS and presented a more physiological distribution of Ca and P when compared to CPMS and ALLOYMS. In the qualitative histological analysis, a mature bone can be observed for CPLS and ALLOYLS.
Conclusions: The implants with surface modification by LASER beam (CPLS or ALLOYLS), regardless of the material manufactured, provided important physical-chemical modifications on the surface, allowing better mechanical resistance with bone tissue when compared to implants with machined surface (CPMS or ALLOYMS).
Methods: The surfaces were analyzed using scanning electron microscopy coupled with X-ray dispersive energy spectroscopy (SEM-EDX) prior to experimental surgery and after removal of the implants. Ninety-six (2x4mm) implants were installed in surgical beds milled in the right and left tibias of 48 male Wistar rats, one implant of each material (metal) or surface installed in each tibia. Biomechanical analysis was performed using the implant removal torque in all groups in the periods of 14, 21 and 42 days postoperatively and the tibiae were processed for histological analysis. The data obtained in the biomechanical analysis were submitted to statistical analysis (p<0.05).
Results: The SEM-EDX before the installation of the implants showed a difference between the surfaces machined and modified by LASER beam, regardless of the metal of the implant. The removal torque of ALLOYLS was statistically higher than CPLS, CPMS and ALLOYMS in 14 and 21 days (p<0.05), as well as CPLS was statistically higher than CPMS and ALLOYMS. In 42 days CPLS and ALLOYLS showed statistical differences when compared to CPMS and ALLOYMS (p<0.05). The SEM-EDX of the removed implants showed total bone coverage on the surfaces of CPLS and ALLOYLS and presented a more physiological distribution of Ca and P when compared to CPMS and ALLOYMS. In the qualitative histological analysis, a mature bone can be observed for CPLS and ALLOYLS.
Conclusions: The implants with surface modification by LASER beam (CPLS or ALLOYLS), regardless of the material manufactured, provided important physical-chemical modifications on the surface, allowing better mechanical resistance with bone tissue when compared to implants with machined surface (CPMS or ALLOYMS).