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

• Felipe-Eduardo Baires-Campos ^[1] ; Ryo Jimbo ^[2] ; Estevam-Augusto Bonfante ^[3] ; Maiolino-Thomaz Fonseca-Oliveira ^[1] ; Camila Moura ^[1] ; Darceny Zanetta-Barbosa ^[1] ; Paulo-Guilherme Coelho ^[4]
  1. [1] Universidade Federal de Uberlândia

     Universidade Federal de Uberlândia

     Brasil

     
  2. [2] Malmö University

     Malmö University

     Suecia

     
  3. [3] Universidade de São Paulo

     Universidade de São Paulo

     Brasil

     
  4. [4] New York University

     New York University

     Estados Unidos

     

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• Localización: Medicina oral, patología oral y cirugía bucal. Ed. inglesa, ISSN-e 1698-6946, Vol. 20, Nº. 4 (julio), 2015
• Idioma: inglés
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• Resumen

  • 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 de - tected 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