American Board of Dental Examiners (ADEX) Dental Hygiene Licensing Examination 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

What are the recommended dimensions for cingulum rest depths?

1 mm wide, 1 mm deep

2 mm wide (F-L), 2.5-3 mm (M-D), 1 mm deep

2 mm wide (F-L), 2.5-3 mm (M-D), 1.5 mm deep

2 mm wide (F-L), 2.5-3 mm (M-D), 2 mm deep

The recommended dimensions for cingulum rest depths are considered important in ensuring adequate support and retention for removable partial dentures. The correct choice specifies a width of 2 mm in the facial-lingual direction and a mesio-distal width of 2.5 to 3 mm, which is appropriate for achieving proper stability and distribution of forces during function. The depth of 2 mm for the rest is optimal, as it allows for sufficient material thickness to prevent fracture and to provide the necessary resistance to displacement.

This specification aligns with the principles of prosthodontics, aiming to provide an effective design that supports the overall biocompatibility and functionality of dental restorations. This depth also facilitates proper positioning of the rest within the preparation, ensuring that the occlusal load is effectively managed, ultimately supporting the longevity and effectiveness of the dental appliance.

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