1. Slot Preparations for Amalgam Restorations
Elizangela Bertoli, DDS, MS

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

3. 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

4. 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.

5. 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

6. Box-only preparation: Slot Preparation for amalgam

7. 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