How long your dentures last will depend on the type of denture, the acrylic used, and your diet. I have made dentures that last 15 to 25 years. The least expensive dentures have a lifespan of three to five years. Some temporary dentures are meant to last six to 12 months while you heal and make a decision about treatment. A diet of hard-to-chew foods like firm veggies, hard candy, and crusty breads or wearing dentures at night, will wear them down sooner. If you experience bone loss, your dentures won’t fit. Call Accura Denture Clinic for your denture needs and free advice.