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International Journal of Dentistry
Volume 2011, Article ID 864183, 6 pages
Research Article

Sealing Capability and SEM Observation of the Implant-Abutment Interface

1Department of Prosthodontics, Integrated Center for Research, Bauru School of Dentistry, University of São Paulo, 17012-901, Bauru, SP, Brazil
2Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, NY 10010, USA
3Department of Prosthodontics, New York University College of Dentistry, New York, NY 10010, USA
4Department of Prosthodontics, Tufts University School of Dental Medicine, Boston, MA 02111, USA
5Department of Biological Science, Bauru School of Dentistry, University of São Paulo, 17012-901 Bauru, SP, Brazil

Received 24 March 2011; Revised 8 May 2011; Accepted 9 May 2011

Academic Editor: Michael E. Razzoog

Copyright © 2011 Fabio C. Lorenzoni et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


To evaluate the sealing capability of external hexagon implant systems and assess the marginal fit, two groups ( each) were employed: SIN (Sistema de Implantes Nacional, Brazil) and Osseotite, (Biomet 3i, USA). Sealing capability was determined by placing 0.7  L of 1% acid-red solution in the implant wells before the torque of their respective abutments. Specimens were then placed into 2.5 mL vials filled with 1.3 mL of distilled water with the implant-abutment interface submerged. Three samples of 100  L water were collected at previously determinate times. The absorbance was measured with a spectrophotometer, and the data were analyzed by Two-way ANOVA ( ) and Tukey's test. Marginal fit was determined using SEM. Leakage was observed for both groups at all times and was significantly higher at 144 hrs. SEM analysis depicted gaps in the implant-abutment interface of both groups. Gaps in the implant-abutment interface were observed along with leakage increased at the 144 hrs evaluation period.