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What does the term "flange" refer to in dentistry?

  1. A type of dental sealant

  2. A projecting rim or lower edge of a prosthesis

  3. A method of cleaning teeth

  4. A cosmetic treatment for gums

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

In dentistry, the term "flange" specifically refers to a projecting rim or lower edge of a prosthesis, particularly in dentures. The flange extends beyond the base of the denture to provide a better fit and stability in the oral cavity. It plays a crucial role in supporting the soft tissues of the oral cavity and helping with retention. By creating a seal against the alveolar ridge and the surrounding tissues, the flange aids in preventing food from getting under the prosthesis, which can cause discomfort and affect functionality. Understanding the configuration and importance of flanges is essential for dental professionals when designing and fitting dentures, as they significantly impact comfort and usability for the patient. Other options mentioned do not accurately capture the dental definition of "flange," as they pertain to different aspects of dental care or treatment.