Since the root is not covered by enamel, it lacks insulation against hot and cold. Usually this is a gradual problem which develops over time. Just advise the patient to stay away from hot or cold liquids or food and to try to stay away from that area. The patient can be scheduled for a root desensitization when the ship is in your homeport. Aphthous ulcers, or canker sores, are the most common lesion of the mucosa membrane.
Nobody really knows why they arise and why they heal.
In 10 to 14 days they will heal. Until then, reassure the patient and advise the patient to stay away from spicy foods. If the ulcers are so painful that the patient cannot eat, apply viscous lidocaine to them before meals. When a patient looses a filling, there may be some discomfort associated with eating or drinking hot or cold foods or beverages. Advise the patient to eat on the other side and stay away from the tooth.