INBDE (Integrated National Board Dental Examination) Practice Exam

The outline form refers to the initial preparation of a tooth for a crown or restoration. The depth of the outline form should ideally be around 0.2mm into the dentin. This level of depth allows for retention and resistance form of the final restoration while also preserving enough healthy tooth structure for long-term success. Option A is too shallow and may not provide enough retention, while options C and D are deeper than necessary and can result in unnecessary removal of tooth structure.