Flexible partials offer both strength and flexibility and do not contain metal, which some patients prefer. They are becoming an increasingly popular option for upper arches. They can be used on a lower, but the strongest option would still be cast metal.
We offer a Duraflex flex partial material. They are easy to adjust in office and they are stronger than other flex partial materials out there so more difficult to break.
But if they do happen to break, repair acrylic does not bond well to them or any flex material, so repairs are not likely to hold long. They also cannot be relined and adding a tooth to them is not practical, as it may not attach well.
If you are hard on dentures, your gums are still changing rapidly or you know you are going to loose more teeth soon, this is not the best option for you.