system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Theme: Tooth Preparation Procedures
A - Cingulum rest preparation
B - Composite restorations
C - Full-coverage crown
D - Guide plane preparation
E - Partial-coverage cast restoration
F - Tilting cast
For each of the following descriptions, choose the most appropriate preparation or procedure from the list above. You may use each option once, more than once or not at all.
1) Presence of deep hard tissue undercut associated with the anterior maxilla.
2) Modification of an unfavourable survey line, prior to recording a master impression.
3) Capacity to provide additional support and in certain circumstances indirect retention
assistant
The correct answer is  None