The methods of handling and nursing measures when a hamster loses its teeth are as follows:
Observe the Tooth Condition
First, observe the location and extent of the hamster's tooth loss. If it's just a partial break, the tooth usually grows back in a few days. If the whole tooth has fallen out, it will take a longer time to recover.

Provide Soft Food
During the period when the tooth is missing, the hamster's chewing ability will decline. You should provide soft food such as cooked carrots, corn, and hamster feed. Avoid hard foods, as they may prevent the hamster from eating.
Supplement Calcium
Hamsters need a large amount of calcium to promote the growth of new teeth during the tooth - recovery period. You can feed them an appropriate amount of dried freshwater shrimp or other high - calcium foods.
Monitor Tooth Growth
Regularly check the growth of the hamster's teeth to ensure that the tooth length is appropriate and avoid over - growth, which may cause difficulty in closing the mouth. If you find that the teeth are too long, you can trim them yourself or take the hamster to a pet hospital for treatment.
Anti - inflammatory Treatment
If there is an accompanying oral inflammation, you can use drugs such as chlorhexidine and metronidazole for anti - inflammatory treatment. Usually, the inflammation will improve after a week.
Medical Advice
If the situation is severe or you're unsure how to handle it, it is recommended to take the hamster to a pet hospital for an examination as soon as possible to ensure it receives professional treatment and care.