Alabama's highest court on Friday upheld a state law that makes it a crime for non-dentists there to provide teeth-whitening services.

The court ruled against two teeth-whitening specialists, Keith Westphal and Joyce Osborn Wilson, both of whom were barred from operating teeth-whitening businesses in Alabama because they weren't licensed dentists. They claimed in court that excluding them from the teeth-whitening industry violated their due-process rights guaranteed by the state's constitution.

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