California Registered Dental Assistant (RDA) Written Practice Exam

Why is an evenly contoured alveolar ridge important for the fit of a removable prosthesis?

1. For mastication and for a better fit

2. For aesthetic purposes only

3. To prevent oral infections

4. To improve speech

The correct answer is: For mastication and for a better fit

An evenly contoured alveolar ridge is important for the fit of a removable prosthesis because it allows for adequate support and stability of the prosthesis during mastication, or chewing. Without an evenly contoured ridge, the prosthesis may shift or become loose, making it difficult to properly chew and potentially causing discomfort or difficulty eating. Additionally, a well-contoured ridge helps create a better fit for the prosthesis which can minimize potential oral infections that may occur from food debris getting trapped under the prosthesis. While an evenly contoured ridge may also contribute to improved speech, it is not the primary reason for its importance in the fit of a removable prosthesis. Aesthetics may also be improved with a well-contoured alveolar ridge, but this alone is not the main reason for its importance.