The objective of this study was to evaluate the influence of machined or moderately rough surfaces on osseointegration of implants.
Materials and methods
Three months after extraction of all mandibular premolars and first molars in six Labrador dogs, two implants, one with a novel turned surface (Combed) and a second with a moderately rough surface (ZirTi), were placed in each side of the mandible in the premolar region of each dog. The 3-D parameters to express roughness and density of peaks were Sa = 1.399 μm and Sds = 0.065 μm2 for the ZirTi surface and Sa = 0.600 μm and Sds = 0.314 μm2 for the Combed surface, respectively.
Abutments were attached and the flaps were sutured to allow non-submerged healing. The animals were sacrificed after four months of healing, and ground sections were obtained for histomorphometric assessments of the hard-tissue integration.
Results
All of the implants were osseointegrated. Mineralized bone-to-implant contact was 50.6 ± 18.3 % and 56.3 ± 18.6 %, while bone density was 54.6 ± 9.6% and 43.0 ± 9.0% at the Combed and ZirTi surfaces, respectively. The difference between the two surfaces was statistically significant (p = 0.046) for both parameters evaluated.
Conclusion
Implant surface characteristics influence the degree of osseointegration of implants placed in the alveolar process.
Editorial note: The full article was published in the 4/2016 issue of the Journal of Oral Science and Rehabilitation. It can be access free of charge at www.dtscience.com.
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