title: Evaluation of the Cortical Bone Reaction Around of Implants Using a Single-Use Final Drill: A Histologic Study.
abstract: OBJECTIVE
  This study was designed to compare the cortical bone reaction following traditional osteotomy or the use of a single-use final drill in the osseointegration of implants in the tibia of rabbits.
  
  
  METHODS
  For this study, 48 conical implants, of standard surface type and design and manufactured by the same company, were inserted into the tibiae of 12 rabbits and removed after 30 or 60 days for histologic analysis. Two test groups were prepared according to the drill sequence used for the osteotomy at the preparation sites: in the control group was used a conventional drill sequence with several uses, whereas the test group (tesG) used a single-use final drill. The bone-to-implant contact and qualitative factors of the resulting cortical bone were assessed.
  
  
  RESULTS
  Both techniques produced good implant integration. Differences in the linear bone-to-implant contact were observed between the drilling procedures as time elapsed in vivo, with the tesG appearing to have clinical advantages. Both groups exhibited new bone in quantity and in quality; however, the tesG exhibited a higher level of new bone deposition than the control group.
  
  
  CONCLUSIONS
  Within the limitations of this study, the findings suggest that the use of a single-use final drill leads to better and faster organization of the cortical bone area during the evaluated period and may avoid the possible problems that can be caused by worn drills.
authors.affiliation: Biotecnos Research Center, Department of Research, Santa Maria, Brazil; and the Catholic University of Uruguay, Professor of the Post-Graduate Program in Dental Implants, Montevideo, Uruguay.
authors.forename: Sergio Alexandre
authors.initials: SA
authors.lastname: Gehrke
mesh_terms: D000818:Animals; D004195:Disease Models, Animal; D016348:Osseointegration / Q000502:physiology*; D010027:Osteotomy / Q000379:methods*; D019736:Prostheses and Implants; D011817:Rabbits; D013977:Tibia / Q000166:cytology / Q000601:surgery*