Final answer:
Gingival graft cannot relieve dentinal hypersensitivity in the cervical area of a tooth. The correct answer is option 4.
Step-by-step explanation:
Gingival graft is a surgical procedure used to treat gum recession, not dentinal hypersensitivity. It involves taking gum tissue from one area and grafting it onto the exposed root surface.
To relieve dentinal hypersensitivity in the cervical area of a tooth, desensitizing toothpaste, dental sealants, and fluoride varnish are common treatment options. Desensitizing toothpaste contains ingredients such as strontium chloride or potassium nitrate that help to reduce sensitivity. Dental sealants are a thin protective coating applied to the surface of the tooth to block exposure to stimuli. Fluoride varnish is a concentrated fluoride treatment that can strengthen the tooth enamel and reduce sensitivity.