The ADA actually publishes a book which breaks down many fees for common procedures by zipcodes. So it can gice you an idea of what the max/min and if I recall the 30th, 50th, 70th and 90th percentile fees are.
For crown and bridge atleast, the old standard for fee determination is 5 times your lab fee.
In general you're free to set your fees where you want them based on what you feel your market will accept. If you participate with insurance plans, you can still set your fees where you want, but you'll endup having to adjust off some of that fee if it lies above what the insurance company determines the "Usual, Customary, and Reasonable (UCR)" fee is for your area.