Tooth #20 DO for Advanced Standing Dental Program Bench Exams – Mandibular Left Second Premolar, made of Ivorine. Prepared by Kilgore for a small class II cavity and ready to fill with amalgam or composite. Does not include screw. Shipped in a sealed bag. NOTE: this prep does not reflect an ideal Class II, but a typical cavity design and should not used to guide you with ideal class II outline forms. It is sold for practicing class II fillings.