Experimental study demonstrates reduced reverse torque from nanoparticle contamination in implant abutment screws, suggesting settling effects diminish after cyclic loading.
Contamination of abutment screws with titanium nanoparticles decreased screw reverse torque values because of a settling effect, though this effect seemed minimal after five cycles. A future clinical study is indicated to validate if cleaning of contaminated screws before the delivery of the prosthesis will increase preloads.
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Lee et al. (2015) studied this question.
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