I have had a partial upper front denture for over 40 years, obviously not the same one , but think this is only my second in all that time. It has three teeth attached to a ? metal plate. It is firmly fixed . Initially it was loose and I remember running back and forward to have it adjusted. The end result wouldn't be as cosmetically pleasing as there is a bit of overlap , but it ensured a tighter seal. In fact it's so tight sometimes it's difficult to remove. I have had to have it repaired occasionally when a tooth came off. In fact last time I looked up a dental laboratory on line and went direct to them rather than via the dentist. They were excellent. They took impressions and had my appliance ready in just under two hours . Definitely go back and get yours adjusted. It should fit comfortably without any added fixatives .
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