Flexible dentures provide a solution for patients who can't or don't want to use regular dentures. The most obvious advantage is that they aren't brittle, so they're less likely to shatter if they're dropped. The British Association of Clinical Dental Technology lists some more benefits:
A review published in the IOSR Journal of Dental and Medical Sciences mentions more advantages of these specialized dentures. Comfort is a major benefit, and patients often find chewing easier than when wearing regular dentures. Some patients are allergic to acrylic resin, nickel or other materials in traditional dentures, and some have difficulty opening their mouths wide. For these patients, the flexible variety may be the only type they can wear.