TY - JOUR
T1 - Drilling dimension effects in early stages of osseointegration and implant stability in a canine model
AU - Baires-Campos, Felipe Eduardo
AU - Jimbo, Ryo
AU - Bonfante, Estevam Augusto
AU - Fonseca-Oliveira, Maiolino Thomaz
AU - Moura, Camila
AU - Zanetta-Barbosa, Darceny
AU - Coelho, Paulo Guilherme
N1 - Publisher Copyright:
© 2015, Medicina Oral S. L. C.I.F.
PY - 2015/7/1
Y1 - 2015/7/1
N2 - 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.
AB - 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.
KW - Biomechanical
KW - Histomorphometry
KW - In vivo
KW - Initial stability
KW - Insertion torque
KW - Osseointegration
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U2 - 10.4317/medoral.20557
DO - 10.4317/medoral.20557
M3 - Article
C2 - 25858087
AN - SCOPUS:84936113051
SN - 1698-4447
VL - 20
SP - e471-e479
JO - Medicina Oral, Patologia Oral y Cirugia Bucal
JF - Medicina Oral, Patologia Oral y Cirugia Bucal
IS - 4
M1 - 20557
ER -