HOSA Dental Terminology Practice

What is the definition of a flange in dental terminology?

1. A projecting rim or lower edge of a prosthesis

2. The upper surface of a denture

3. A type of dental impression material

4. A method of securing a dental appliance

The correct answer is: A projecting rim or lower edge of a prosthesis

In dental terminology, a flange refers to a projecting rim or lower edge of a prosthesis, particularly in relation to dentures. This component is crucial as it helps maintain the position of the denture in the oral cavity by providing stability and support. The flange extends into the vestibular area of the mouth, which aids in distributing forces during chewing or speaking and enhances the retention of the denture. Understanding the role of the flange is key for dental professionals when designing dentures to ensure they fit well and function properly. While the other options pertain to different concepts within dental practices—such as the upper surface of a denture which is called the occlusal surface, a type of dental impression material that is used to create molds of the teeth and gums, and methods of securing dental appliances—the defining characteristic of a flange specifically relates to its structural role in prosthetics.