Cryptocode is absolutely, positively right about an empty space and the rest of the teeth shifting into that space. And about thinning of the gums/bone. Before you make the decision to extract and NOT put an implant in there immediately, should you want to go that route, I very highly recommend asking an orthodontist for advice as per a consultation what an empty hole would cause in your mouth - orthos do do consultations. And most definitely have an oral surgeon do the implant work. I have both older crowns and a semi-recent implant. The implant did not replace a crown.
I have no issues with my crown work - still going strong, so I have no horror stories that would sway me away from them at present. But then, I have an awesome dentist and she only uses American materials/dependable dental labs - no China stuff, which she says is in the professional lit as being inferior.
I have a mantra that I have spouted for years... "If I eat right, I feel right. If I feel right, I exercise right. If I exercise right, I think right. If I think right, I eat right..." Phil-SC