Thank you for your answer. Part of it I did not understand. Pardon my ignorance.
1. The teeth that need to be extracted are 30 and 31, not 21.
2. From what you say I need to have the two teeth replaced because of consequences. I am not clear on what is an "implant". Is it the screw support type which is more expensive? Or Is a bridge/crown also considered an "implant"? Or are these two mean one and the same?
3. I feel I may not be comfortable with dentures.
4. Could you please educate me a little bit about "Implants"? Looks like Implant is my only option.
Thank you for your help.