title: Comparison of removal torques for laser-treated titanium implants with anodized implants.
abstract: OBJECTIVE
  It is difficult to draw any firm conclusions regarding possible differences in implant surface performance in a clinical situation. The purpose of this study was to compare the removal torques of laser-treated (LT) surface of dental implants with TiUnite, which has porous rough anodized surface, evaluating their ability to enhance the bond strength between a titanium substrate and rabbit femur.
  
  
  METHODS
  Two types of dental implants, LT (test, CP titanium grade 4) and commercial porous TiUnite (control, CP titanium grade 4) implants (length, 7 mm; diameter, 3.75 mm) were implanted on the right and left distal femoral metaphyses of 5 adult rabbits weighing 3.0 to 4.0 kg. After 8 weeks, removal torque was measured using a digital torque gauge.
  
  
  RESULTS
  The mean (SD) removal torque was 32.83 (6.15) and 48.59 (8.07) N · cm for the control (anodized) and test (LT) screws, respectively. P = 0.0133 by paired t-test.
  
  
  CONCLUSIONS
  The removal torque of the LT titanium implant embedded in rabbit femoral metaphysis for 8 weeks was stronger than that of the anodized titanium implant.
authors.affiliation: Department of Prosthodontics, College of Dentistry, Kyung-Pook National University, Dae-Gu, South Korea. sungamcho@gamil.com
authors.forename: Sang-Hwan
authors.initials: SH
authors.lastname: Kang
authors.forename: Sung-Am
authors.initials: SA
authors.lastname: Cho
mesh_terms: D000818:Animals; D045662:Dental Etching / Q000295:instrumentation / Q000379:methods*; D015921:Dental Implants; D003764:Dental Materials / Q000737:chemistry* / Q000528:radiation effects; D017267:Dental Prosthesis Design; D055664:Electrochemical Techniques; D005269:Femur / Q000601:surgery / Q000648:ultrastructure; D053844:Lasers, Solid-State; D008297:Male; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D016348:Osseointegration / Q000502:physiology; D016062:Porosity; D011817:Rabbits; D013314:Stress, Mechanical; D013499:Surface Properties; D013997:Time Factors; D014025:Titanium / Q000737:chemistry* / Q000528:radiation effects; D019415:Torque
chemical_list: D015921:Dental Implants; D003764:Dental Materials; C009495:titanium dioxide; D014025:Titanium