Abstract
Objectives The aim of this experimental in vitro study was to evaluate the effects (scratching, tartar removal from root surfaces) on dental prostheses of different oral hygiene instruments. Materials and methods In this study we analyzed 20 surfaces of extracted teeth fitted with fixed prostheses with complete metal crowns. There were four groups of five samples. Each group was treated with different oral hygiene tools: five surfaces were treated with standard Gracey curettes, five with an ultrasonic handpiece and piezoelectric transducer, five with an ultrasonic handpiece and magnetostrictive transducer, and five with glycine powder air polishing. Results and conclusions The comparative analysis of SEM and dedicated software-elaborated images shows that glycine powder air polishing is the treatment of choice for the removal of subgingival tartar and that it allows better preservation of tissues than the other instruments tested.
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