My knowledge of this is limited, but having a gnostic friend who went to the dentist to remove his mercury-fillings, I can relate to you that such a person noticed significant differences in his health as a result.

Mercury is definitely a strong substance that should not be placed in the body, although doctors continue to advocate its use. The pineal gland may definitely be effected by such fillings. While I cannot speak from personal experience about the damages of such, since I've never had mercury-fillings, this person I know has greatly improved his sleep and prevailing daily lethargy; he has been able to wake up at earlier hours without feeling drained. This is just one benefit of removing mercury-fillings according to his experience.