California Registered Dental Assistant (RDA) Written Practice Exam

MOD refers to an dental filling on a tooth involving the mesial, occlusal, and distal surfaces. Therefore, MOD on tooth 14 would be referred to as a Class II classification. Option A, Class IV, refers to a restoration on the incisal edge of an anterior tooth. Option B, Class I, refers to a dental filling on a single surface of a tooth. Option D, Class V, is used for a restoration on the gingival 1/3 of a tooth, usually found on the facial or lingual surface.