yes im pretty it will speed up the process but it shouldnt matter if the pre molar moves anywhere

it will move back mewing or not

I had one of these removed, and what happened is that my whole mouth started shifting, upper and lower both. My teeth, which had moved a little since I had braces twenty years ago, started moving a LOT, and all of a sudden I had visibly crooked teeth.

What I think happens is that with the bone loss of a hole in the jaw, the whole dental arch becomes unstable. My smile is noticeably less wide than it was a year or two ago. (I had a root canal break off  in the summer of 2017 and had to have the root extracted, and like you, am not able to replace it yet.) As far as I can tell, the remaining premolars are collapsing inward and the front teeth are being crowded forward to make room--with one in front of the other, of course. Sigh.

The biggest, and by far the best (to me) effect of mewing so far--chin tucked, occiput lifted, tongue gently but firmly suctioned to the roof of the mouth--is that it's not only halting but actually reversing that arch collapse. I think if you were satisfied with the shape of your smile and face before, and would like it the same or even wider, a nice gentle mew position will help you hold the space so that you CAN get an implant or bridge later on. Otherwise, I think you're likely to have significant shifting of all your teeth and end up narrower--possibly too narrow to get an implant even when you could afford it, and having crowded teeth until (and if) you could afford to straighten them after the implant.

Personally, even though it's humiliating to have a visible gap in my teeth, I'd rather have that and preserve the general shape of my face and fill it later, than to have it fill with a shifting, chaotic change that permanently alters the way I look.

Thanks you for your answers. It's not that I'm satisfied with my face, it's more because I have a lot of trouble mewing (probably a combination of weak tongue+narrow upper palate). Let me explain, I can only put my tongue on the roof of the mouth (I understand the roof as the place where the soft palate ends) starting from the half not the 3/4, because of that the tip of the tongue sits at least one inch far from the tip of the front teeth. The tongue ends up bending on the molars and wisdom teeth (that's why I think my upper palate is too narrow, I'm gonna consult an orthodontic about it this summer, wait lists are so damn long) and exercing a lot of pressure around them, little to none around the front teeth.

So I assumed such an imbalance was probably not a good thing and would help the back teeth advance towards the front teeth. But I'm probably doing this all wrong. Anyway from what I'm getting from your experience, I should still try to get better at it as it seems inevitable if things are let the way they are.

English isn't my primary language, I hope it's still understandable.

I think I understand you. I can't tell exactly where you are placing the tip of your tongue, but what I learned recently is that my tongue has to be way further back than I thought. This lady, who is said to be the leading myofacial therapist in the US, says that the tongue should be resting ON the most forward of the little ridges on the roof of the mouth, not ahead of them as I have read elsewhere. I have an overbite, so when I do this my tongue is not anywhere near my front teeth. 

https://aomtinfo.org/portfolio-item/oral-myofacial-therapy-a-breakthrough-technique-to-treat-symptoms-relating-to-breathing-problems-tmj-headaches-and-other-common-ailments

When I do it this way, my tongue is shorter and fatter, and therefore presses gently against the molars and premolars. As far as I understand, it's okay if your tongue bends to fit between your molars. I think you really just want the gentle stimulation of your tongue being there. I can't swear that I do it perfectly right, but here is what has happened for me: I put my tongue ON the ridges of the roof of the mouth, suck gently, and let my tongue mold gently to the top of my mouth, as far back as it will go. It makes a feeling like paste or glue, and for me, it will just start to tickle the soft palate.

I do not push up with my tongue, or make it hard and tense, or push outward against my teeth at all--I just let it sit there, sucked to the top whenever I'm not talking. If I do this while I'm going to sleep (on my back, with no pillow) then it may still be there when I wake up. And my mouth is getting wider. Does that make sense?

Thanks a lot for your info, it does make sense. For now, the tip of my tongue doesnt reach those little ridges in the front of the palate maybe because I focus too much on getting the rear of my tongue as far back as I can, as I said I think this part of my tongue is too weak and I cant elevate enought of it to the roof. I cant thank you enough for your advices, they are very precise and will follow them thoroughly without trying to apply excessive force.

Awesome. Good luck, and keep us posted. 

 I have just one more question, just to be safe. Is it possible that you are tongue tied? Many people are, but it would need to be treated to make your tongue as mobile as it should be.  https://www.drstevenlin.com/adult-tongue-tie-surgery-changed-life/