ADEX Dental Hygiene Licensing Exam 2025 – Complete All-In-One Guide to Succeed

Question: 1 / 400

What is the recommended rest seat depth at the marginal ridge?

1 mm

1.5 mm

The recommended rest seat depth at the marginal ridge is 1.5 mm. This specific depth is crucial for ensuring adequate support and stability for removable prostheses, allowing them to fit properly and distribute forces evenly during function. A rest seat that is too shallow may not provide enough support, leading to potential displacement of the prosthesis, while a depth that is too great could compromise the structural integrity of the remaining tooth and surrounding tissues. Therefore, 1.5 mm strikes a balance, providing enough depth to accommodate the necessary support while maintaining the health of both the tooth and surrounding gingiva. This depth helps to ensure that the prosthetic device functions effectively without causing harm to oral structures.

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2 mm

2.5 mm

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