Overhanging restoration margins should be removed because:
- a- It provides ideal location for plaque accumulation.
- b- It tears the gingival fibers leading to attachment loss.
- c- Stimulate inflammatory reaction directly.
- d- Its removal permits more effective plaque control.
- e- A & d.
The most accurate answer is: e. A & d. Overhanging restoration margins should be removed because they:
- Provide an ideal location for plaque accumulation:
Plaque is a sticky film of bacteria that forms on teeth and can contribute to cavities and gum disease. Overhanging margins create a sheltered area where plaque can easily build up and be difficult to remove with brushing and flossing.
- Stimulate an inflammatory reaction directly:
The rough edge of an overhanging restoration can irritate the gum tissue, leading to inflammation, redness, and bleeding. This inflammation can damage the attachment of the gums to the teeth, contributing to gum disease.
- Permit more effective plaque control:
Once the overhanging restoration margin is removed, the tooth surface becomes smoother and easier to clean. This allows for better plaque removal through brushing and flossing, reducing the risk of cavities and gum disease.
Other Options:
While the other options have some truth to them:
b. It tears the gingival fibers leading to attachment loss:
While overhangs can contribute to attachment loss, it's not the primary reason for removal.
c. Stimulate inflammatory reaction directly:
This is already covered in point e.
Therefore, the combination of providing a haven for plaque and hindering effective cleaning makes removing overhanging restoration margins crucial for maintaining good oral health.
