Cavity on front tooth gum line
Decay at the gum line can affect the exposed root or crown and should be examined before it grows or causes sensitivity.
The short answer
Decay at the gum line can affect the exposed root or crown and should be examined before it grows or causes sensitivity. The dentist will determine whether the area is active caries, a non-carious notch, staining, or a restoration margin.
What is the direct answer?
What does this question mean?
The crown is covered by enamel, while a receded gum can expose root dentine, which is softer and more sensitive. Plaque retained at the gum margin produces acids that dissolve mineral from the tooth surface and can create a cavity.
What can you do next?
Brush twice daily with fluoride toothpaste and clean along the gum margin without scrubbing. Reduce frequent sugary or acidic drinks and do not pick at the defect; a dentist may use fluoride treatment, monitoring, or a filling depending on depth and activity.
When should you seek dental care?
Arrange care for a visible hole, rough edge, sensitivity, food trapping, or pain. Swelling, fever, spontaneous pain, or a bad taste can signal pulpal or periapical infection and needs urgent dental assessment.
What should you ask the dentist?
Ask whether the defect is enamel decay, root caries, abrasion, erosion, or a failing filling, and whether an X-ray is useful. Ask whether it needs a restoration, fluoride therapy, desensitizing care, or observation.
Frequently asked questions
Can a gum-line cavity be brushed away?
Brushing can remove plaque and support early mineral repair, but a formed cavity needs professional evaluation and may require a filling.
Why is the area sensitive?
Exposed dentine contains microscopic tubules that can transmit temperature and touch toward the pulp.