Implant-supported dentures provide the best alternative for patients looking for a sturdier option to dentures, and a more affordable option to dental implants. With as few as 2 to 6 implants, your implant-supported dentures can replace a full set of upper/lower teeth. When properly cared for, this type of dental prosthetic can last up to 20 years (or longer!). Here are the steps you need follow in terms of maintenance to get the most out of your investment: