Ask Well: Replacing a Dental Crown - NYTimes.com:
"Patients should be aware that dental professionals are financially motivated to replace restorations. Also, some dentists, especially younger ones, prefer the appearance of white restorations, rather than gold crowns, which are typically used on back teeth in patients who favor crown longevity over aesthetics. Replacing a crown is not just a matter of cost. Every time a dentist puts in a crown or a filling, “some damage is done to the pulp,” Dr. Donovan said, so some teeth that were crowned may eventually require a root canal. Restorations also take away tooth structure, increasing the risk of fracture." (read more at link above)
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