title: Drilling dimension effects in early stages of osseointegration and implant stability in a canine model.
abstract: BACKGROUND
  This study histologically evaluated two implant designs: a classic thread design versus another specifically designed for healing chamber formation placed with two drilling protocols.
  
  
  METHODS
  Forty dental implants (4.1 mm diameter) with two different macrogeometries were inserted in the tibia of 10 Beagle dogs, and maximum insertion torque was recorded. Drilling techniques were: until 3.75 mm (regular-group); and until 4.0 mm diameter (overdrilling-group) for both implant designs. At 2 and 4 weeks, samples were retrieved and processed for histomorphometric analysis. For torque and BIC (bone-to-implant contact) and BAFO (bone area fraction occupied), a general-linear model was employed including instrumentation technique and time in vivo as independent.
  
  
  RESULTS
  The insertion torque recorded for each implant design and drilling group significantly decreased as a function of increasing drilling diameter for both implant designs (p<0.001). No significant differences were detected between implant designs for each drilling technique (p>0.18). A significant increase in BIC was observed from 2 to 4 weeks for both implants placed with the overdrilling technique (p<0.03) only, but not for those placed in the 3.75 mm drilling sites (p>0.32).
  
  
  CONCLUSIONS
  Despite the differences between implant designs and drilling technique an intramembranous-like healing mode with newly formed woven bone prevailed.
authors: Department of Prosthodontics, Alameda Octávio Pinheiro Brisola, 9-75, Bauru, SP, Brasil, 17012-901, estevamab@gmail.com.
authors: Felipe-Eduardo
authors: FE
authors: Baires-Campos
authors: Ryo
authors: R
authors: Jimbo
authors: Estevam-Augusto
authors: EA
authors: Bonfante
authors: Maiolino-Thomaz
authors: MT
authors: Fonseca-Oliveira
authors: Camila
authors: C
authors: Moura
authors: Darceny
authors: D
authors: Zanetta-Barbosa
authors: Paulo-Guilherme
authors: PG
authors: Coelho
mesh_terms: D000818:Animals; D003758:Dental Implantation, Endosseous / Q000379:methods*; D015921:Dental Implants; D004285:Dogs; D008297:Male; D023421:Models, Animal; D016348:Osseointegration
chemical_list: D015921:Dental Implants