Re: Opinions please.......shifting teeth
You will have shifting. The teeth next to the extracted tooth will lean in and if you're having an lower tooth extracted, the tooth directly above it will actually grow down. All movement is to fill the new gap. Yes, it does take time for this to happen, but, it will happen. Are you comfortable with your bite changing? Since your bite will change, that can also cause TMJ problems.
It sounds like you had a root canal done on a cracked tooth? Is that what you meant?
FYI: I've worked in the dental industry for over 23yrs.
Let me know....