im only 17 years old, but i feel like for the last year, maybe even longer, i've been clenching or grinding my teeth at night. Two of my front teeth are worn down, and my masseter muscle is sticking way out. I used to have a much softer jawline and i looked a lot better, but now it just sticks out really far and does not look good.

I recently went to the dentist and they said to use a mouthgaurd. The thing is, the mouthgaurd doesn't reduce the size of the jaw muscle does it? it just stops the problem from getting worse. I want it to actually improve, so i read about botox which reduces the size of the muslce as well as stops bruxism better than a mothgaurd. I called up different dentists and they all said that only specialists do it, and you have to get a recommendation from a dentist, and this can happen only after nothing else works. The thing is i already know that the other things won't work because they're not supposed to accomplish what i want.

Will the mouthgaurd actually reduce the size of the jaw muscle, or will is just take the punisment of the clench instad of my teeth?

and

What is the best way i can convince my dentist to make a recommendation for botox, with me not actually trying the moiuthgaurds or splints?