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International Journal of Biomaterials
Volume 2013 (2013), Article ID 230310, 6 pages
Research Article

The Effect of Simplifying Dental Implant Drilling Sequence on Osseointegration: An Experimental Study in Dogs

1Department of Biomaterials and Biomimetics, New York University, 345E 24th Street, Room 813A, New York, NY 10010, USA
2Postgraduate Program in Dentistry, School of Health Sciences, UNIGRANRIO University, Rua Professor José de Souza Herdy, 1.160-25 de Agosto, 25071-202 Duque de Caxias, RJ, Brazil
3Department of Prosthodontics, Faculty of Odontology, Malmö University, Smedjegatan 16, 214 2 Malmö, Sweden
4Department of Operative Dentistry and Prosthodontics, Tufts University School of Dental Medicine, One Kneeland Street, Boston, MA 02111, USA
5Department of Epidemiology and Health Promotion, New York University College of Dentistry, New York, NY 10010, USA
6Department of Periodontology and Implant Dentistry, New York University College of Dentistry, 345E 24th Street, New York, NY 10010, USA

Received 9 October 2012; Accepted 15 December 2012

Academic Editor: Carlos Nelson Elias

Copyright © 2013 Gabriela Giro 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.


Objectives. To test the hypothesis that there would be no differences in osseointegration by reducing the number of drills for site preparation relative to conventional drilling sequence. Methods. Seventy-two implants were bilaterally placed in the tibia of 18 beagle dogs and remained for 1, 3, and 5 weeks. Thirty-six implants were 3.75 mm in diameter and the other 36 were 4.2 mm. Half of the implants of each diameter were placed under a simplified technique (pilot drill + final diameter drill) and the other half were placed under conventional drilling where multiple drills of increasing diameter were utilized. After euthanisation, the bone-implant samples were processed and referred to histological analysis. Bone-to-implant contact (BIC) and bone-area-fraction occupancy (BAFO) were assessed. Statistical analyses were performed by GLM ANOVA at 95% level of significance considering implant diameter, time in vivo, and drilling procedure as independent variables and BIC and BAFO as the dependent variables. Results. Both techniques led to implant integration. No differences in BIC and BAFO were observed between drilling procedures as time elapsed in vivo. Conclusions. The simplified drilling protocol presented comparable osseointegration outcomes to the conventional protocol, which proved the initial hypothesis.