Slot Preparations for Amalgam Restorations Elizangela Bertoli, DDS, MS

Overview Box-only preparation Slot preparation for root caries Rotated teeth

Box-only preparation: Slot Preparation for amalgam Indication Proximal caries lesions with no occlusal fissures involvement Narrow proximal contact with minimal facial and lingual extensions

Box-only preparation: Slot Preparation for amalgam Facial and lingual proximal walls converge occlusally No. 330 or 245 Retention grooves 0.5mm depth at the gingival point angle 0.3mm at the occlusal surface Retention grooves are placed with a No. 1⁄8 or 1⁄4 bur.

Box-only preparation: Slot Preparation for amalgam Preparations are opened facially and lingually so that contact is just broken to allow for carving and burnishing

Box-only preparation: Slot Preparation for amalgam

Copyright Most of pictures in this presentation comes from the text book adopted in the restoratives classes with permission from the publisher. No pictures may be reproduced without written permission from the publisher. Sturdevant’s Art and Science of Operative Dentistry 6th Edition Sturdevant’s Art and Science of Operative Dentistry 6th Edition Fundamentals of Operative Dentistry 4th Edition