If a hamster loses its teeth, it doesn't directly affect its lifespan because the teeth will regenerate. A hamster's teeth will grow back within one to two months. This is part of their natural growth process. So, tooth loss doesn't pose a threat to a hamster's life. As long as you pay attention to its care and provide a proper environment for it to gnaw on things, the hamster can regain its health quickly.

Hamster Lifespan and Factors Affecting It
The average lifespan of a hamster is usually 2 - 3 years, but different breeds have different lifespans. For example, Roborovski hamsters generally have a longer lifespan. Factors that affect a hamster's lifespan include breed, genetic diseases, the living environment, and diet. To extend a hamster's lifespan, you need to provide a comfortable and spacious living environment, fresh and clean food and water, and pay attention to whether to keep it alone or in a cage with others.
Signs of Aging in Hamsters and Care Methods
As hamsters age, they will show signs of aging such as slower movement, duller reactions, duller fur, and decreased appetite. To extend a hamster's lifespan, you can provide enough space for activities and toys, maintain a healthy and diverse diet, and spend more time with them to enhance their sense of well - being.