My mom wouldn't pay for anaesthetic for fillings, to discourage me from eating candy. It didn't work. I endure dentistry about as well as other invasive medical work, but I'm now very cautious about the bills. Far too many of the younger ones, with huge debt loads, try to hard-sell the most expensive work. Porcelain caps are expensive, brittle garbage. One place was charging me about $12 per sandwich chewed to glue them in, and then destroyed one with a botched post addition. Years later, I tried another place with an appointment specifically to have another one re-glued, and walked out with a bill for $280 for X-rays, and an estimate of $4000 to fix it, starting with an extraction. I had wisely turned that down, and found another dentist who fixed that tooth and another, similar one for $2k. I couldn't even get good copies of those expensive X-rays for the new dentist.
Never, ever trust a for-profit enterprise without hard evidence. When I got the recommendation for the good dentist, I said I'd give her a try, and then my friend followed me outside into a bitter cold wind to spend another five minutes singing her praises. Still, he won't touch popcorn.