Drilling dimension effects in early stages of osseointegration and implant stability in a canine model

Felipe Eduardo Baires-Campos, Ryo Jimbo, Estevam Augusto Bonfante, Maiolino Thomaz Fonseca-Oliveira, Camila Moura, Darceny Zanetta-Barbosa, Paulo Guilherme Coelho

Research output: Contribution to journalArticlepeer-review


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. Material and 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.

Original languageEnglish (US)
Article number20557
Pages (from-to)e471-e479
JournalMedicina Oral, Patologia Oral y Cirugia Bucal
Issue number4
StatePublished - Jul 1 2015


  • Biomechanical
  • Histomorphometry
  • In vivo
  • Initial stability
  • Insertion torque
  • Osseointegration

ASJC Scopus subject areas

  • Surgery
  • Otorhinolaryngology
  • General Dentistry


Dive into the research topics of 'Drilling dimension effects in early stages of osseointegration and implant stability in a canine model'. Together they form a unique fingerprint.

Cite this