It sounds like your lower jaw may have grown a little more than your upper jaw, which creates what call a "tight bite." This makes the system "rub," and leads to a vertical pattern of wear on the backs of the upper front teeth and the fronts of the lower front teeth, which makes them "thin."
What is needed is more room. This means some kind of orthodontics and, if it's bad enough, surgery to facilitate the orthodontics. THEN AND ONLY THEN can you restore the teeth successfully long term.
The trouble is teeth and porcelain fail differently. Teeth wear and porcelain breaks. So what you have had is a slow steady wearing down of the teeth. Porcelain in the same arrangement will likely break. If you try to restore it without creating space first, you either get high likelihood of failure or a funny looking case because you try to radically change the shape of the teeth to compensate for not putting them in the right place to begin with.
Wish I had an easier answer for you. Find a highly skilled, highly recommended dentist you trust completely!
Best wishes!