Hi Seva, thanks for the thread! What I learned is, that the strengthening of the teethsurface glace and the bones is a deceptive argument, as it's reducing flexibility. That way, the teeth are much more sensitive to changes in temperature, like with hot coco or ice. Soldiers in Vietnam used fluor tablets and damaged their brain tissue because of it. They were the guinea pigs! There's an explanation (in contrast to the calcification that is mentioned) of the crystallisation of the pineal gland in the messages of The Group, archangel Michael and other ascended beings, just check
www.lightworker.com
The essence of this explanation is the way a crystal in a radio works, dealing with different frequencies or wavelengths.
Can you imagine?
At this moment there's an Activation of the Pineal Gland workshop scheduled, maybe this info is useful for you, wavy greetings.