The methods for handling and nursing a hamster that has lost its teeth are as follows:
Observe the dental 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 an entire tooth has fallen out, it will take a longer time to recover.

Provide soft food: During the period of tooth loss, the hamster's chewing ability will decline. Soft foods such as cooked carrots, corn, and hamster food should be provided. Avoid hard foods that may prevent the hamster from eating.
Supplement calcium: During the tooth - recovery period, the hamster needs a large amount of calcium to promote the growth of new teeth. You can feed it 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 teeth are of an appropriate length and to avoid over - growth, which can cause difficulty in closing the mouth. If the teeth are found to be 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, anti - inflammatory drugs such as chlorhexidine and metronidazole can be used. Usually, the inflammation will improve after a week.
Medical advice: If the situation is severe or you're not sure how to handle it, it is recommended to take the hamster to a pet hospital for examination as soon as possible to ensure it receives professional treatment and care.