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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.
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Kang et al. (2011) studied this question.
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