The fact that sharks use fluoroapatite as tooth biomineral instead of hydroxyapatite which is used by mammals does not lead by a higher hardness of the shark teeth and must have a different, but hitherto unknown, reason.
The fact that sharksuse fluoroapatite as tooth biomineral instead of hydroxyapatitewhich is used by mammals does not lead by a higher hardness ofthe shark teeth and must have a different, but hitherto unknown,reason.