Can you build up the back teeth to increase vertical face dimension?

Is it possible to add some sort of overlay to the top of your back teeth (or possible all the teeth to make it even) so that it increases your vertical facial dimensions (basically the same as opening your teeth a bit with your mouth still closed, but without the effort of consciously doing it)? I read that you can add 4mm of length by doing this. is this true? PS i already know about genioplasty and implants to add vertical length, but i am asking specifically about this procedure. Thank you

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