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Comparison of Removal Torques for Laser-Treated Titanium Implants With Anodized Implants

Kang, Sang-Hwan DDS; Cho, Sung-Am DDS, PhD

Journal of Craniofacial Surgery: July 2011 - Volume 22 - Issue 4 - p 1491-1495
doi: 10.1097/SCS.0b013e31821d4d98
Scientific Foundation

Purpose: 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.

Method: 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.

From the Department of Prosthodontics, College of Dentistry, Kyung-Pook National University, Dae-Gu, South Korea.

Accepted for publication November 20, 2010.

Received April 6, 2010.

Address correspondence and reprint requests to Sung-Am Cho, DDS, PhD, Department of Prosthodontics, College of Dentistry, Kyung-Pook National University, #188-1 Samduck 2Ga, Jung-Gu, 700-412, South Korea; E-mail:;

Part of this article was presented at the Academy of Osseointegration (poster no. 112), 2004, San Francisco, CA.

The authors report no conflicts of interest.

© 2011 Mutaz B. Habal, MD