Actually it does affect tonal quality. The size (volume) and shape of the palate changes the voice dramatically. The great tenor Carusoe had a mouth large enough to hold a turkey egg in the shell.
thanks for the info. I have opted to go a partial for the four front teeth. I have the temporary partial now and it actually fits quite well, and my dentist assured me the permanent one will be even better. So for now, I am going to try the partial plate which they are designing using titanium so that most of my palate will be free of material. If it doesn't work out, then I will go with the full partial.
Got full upper dentures ten days ago. I'm 58 and have sung for a living for years. Was scared spitless leading up to the procedure. 1-procedure was completely painless, got a great dentist at affordable dentures. 2-gums tender, but NOT painful. 3-dentures fit like a glove. 4-all fears about pronunciation and "re-learning to sing" were for naught! Sang this weekend exactly like I always have (used Fixodent for the first time, to be safe, rather than sorry). Should have done it 5 years ago, missed a lot of smiling! Good luck.
I would talk to a periodontist (who does implants) and a prosthodontist to get different opinions on options. you can do a full denture, or you could do implants or a combo of both, but I would ask them what they think and what would fall into your price range that you can afford.
The thickness of palatal plate probably does not affect singing capability. Ariculation or pronunciation is much influended by front teeth alignment. A well made full upper can yield comfortable and effortless articulation. Seeing a prosthodontist is advised.