Evaluation of a nanometer roughness scale resorbable media-processed surface: A study in dogs

Charles Marin, Rodrigo Granato, Estevam A. Bonfante, Marcelo Suzuki, Malvin N. Janal, Paulo G. Coelho

Research output: Contribution to journalArticlepeer-review


Objectives: This study compared the biomechanical fixation and bone-to-implant contact (BIC) of implants with different surfaces treatment (experimental - resorbable blasting media-processed nanometer roughness scale surface, and control - dual acid-etched) in a dog model. Material and methods: Surface characterization was made in six implants by means of scanning electron microscopic imaging, atomic force microscopy to evaluate roughness parameters, and X-ray photoelectron spectroscopy (XPS) for chemical assessment. The animal model comprised the bilateral placement of control (n=24) and experimental surface (n=24) implants along the proximal tibiae of six mongrel dogs, which remained in place for 2 or 4 weeks. Half of the specimens were biomechanically tested (torque), and the other half was subjected to histomorphologic/morphometric evaluation. BIC and resistance to failure measures were each evaluated as a function of time and surface treatment in a mixed model ANOVA. Results: Surface texturing was significantly higher for the experimental compared with the control surface. The survey XPS spectra detected O, C, Al, and Ti at the control group, and Ca (~0.2-0.9%) and P (~1.7-4.1%) besides O, C, Al, and Ti at experimental surfaces. While no statistical difference in BIC was found between experimental and control surfaces or between 2 and 4 weeks in vivo, both longer time and use of experimental surface significantly increased resistance to failure. Conclusions: The experimental surface resulted in enhanced biomechanical fixation but comparable BIC relative to control, suggesting higher bone mechanical properties around the experimental implants.

Original languageEnglish (US)
Pages (from-to)119-124
Number of pages6
JournalClinical Oral Implants Research
Issue number1
StatePublished - Jan 2012


  • Animal experiments
  • Biomechanical testing
  • Dental implant
  • Histology
  • Surface

ASJC Scopus subject areas

  • Oral Surgery


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