title: Comparison of removal torques of SLActive® implant and blasted, laser-treated titanium implant in rabbit tibia bone healed with concentrated growth factor application.
abstract: OBJECTIVE
  The purpose of this study was to compare the removal torques of a chemically modified SLActive implant and a blasted, laser-treated (BLT) implant, which were soaked in saline for 2 weeks after their surface modifications. The removal torques of the two implants were measured 4 weeks after their implantation into the bone defect area in rabbit tibias with concentrated growth factor (CGF) application.
  
  
  METHODS
  To make artificial bone defects in the cortical layers of both tibias, an 8-mm diameter trephine bur was used. Then, prepared CGF was applied to the bony defect of the left tibia, and the bony defect of the right tibia was left unfilled. Four weeks later, the surgical sites of 16 rabbits were re-exposed. For 8 rabbits, the SLActive implants (Straumann, Switzerland) were inserted in the left tibia, and the BLT implants (CSM implant, Daegu, Korea) were inserted in the right tibia. For other rabbits, the BLT implants were inserted in the left tibia, and the SLActive implants were inserted in the right. Four weeks afger the insertion, torque removal was measured from 4 rabbits exterminated via CO2 inhalation.
  
  
  RESULTS
  No significant difference was observed between removal torques of the BLT implant and the SLActive implant (P>.05).
  
  
  CONCLUSIONS
  It was found that BLT surface modification exhibited excellent osseointegration. In addition, CGF application did not affect the insertion and removal torque of the implants.
authors.affiliation: Department of Prosthodontics, Kyung-Pook National University of Dentistry, Daegu, Republic of Korea.
authors.forename: Sang-Hun
authors.initials: SH
authors.lastname: Park
authors.affiliation: Department of Prosthodontics, Kyung-Pook National University of Dentistry, Daegu, Republic of Korea.
authors.forename: Kyung-Soon
authors.initials: KS
authors.lastname: Park
authors.affiliation: Department of Prosthodontics, Kyung-Pook National University of Dentistry, Daegu, Republic of Korea.
authors.forename: Sung-Am
authors.identifier: 0000-0002-8315-7833
authors.initials: SA
authors.lastname: Cho
keywords: Concentrated growth factor (CGF); Laser-treated implant; Removal torque; SLActive