Your dentures will be properly seated if the upper denture is suctioned securely against the roof of your mouth without feeling too tight. A lower denture is looser because it rests on your gums with the help of gravity, but it should feel stable, neither too loose nor too tight, and it should allow you to speak and eat without pinching or chafing your gums. A partial denture should rest on your other teeth without falling out or interfering with the way your upper and lower teeth fit together. If you have implants for your denture, then your denture will have a little ‘bounce’ to it, but the implants will keep it securely in place and help you avoid uncomfortable slipping or chafing.