So your dentist is recommending a partial denture to compensate for a “gap” in your mouth, but what is it? Turns out, partial dentures are pretty common and have tons of benefits. They require some maintenance but are generally easy to get used to and do a great job keeping your mouth healthy. Partial dentures are exactly what they sound like, a removable denture that fits to only part of your mouth, usually to fill a gap(s) in between your teeth.