Ok, now this is an honest question and please dont lecture me on how stupid
I am for even considering this (already heard the lectures, know the risks,
but am desperate).  I have a full set of xrays of my teeth so I can see
their anatomy and I have a high pain tolerance so that isnt a concern.

I have "unfortunate" teeth.  I brush 3x day, floss 3x day, and use flouride
toothpaste and rinse.  I dont eat sugar or drink soda.  Every time I have
saved up the cash to get a tooth fixed, it ends up with further problems
withing about three months.  For example:  had a tooth root canaled and
within 90 days the tooth turned black.  Another root canal has a post
pushing against a nerve and my sinuses but the dentist will not repair it -
he wants to refer me to the oral surgeon who was responsible for the tooth
that went black.  Had a tooth filled with amalgam and withing a month or two
the outer edges of tooth began to break off away from the amalgam.  Anyway,
to make it short, I have a mouth full of broken or otherwise damaged teeth.
By the way, my bones also break easily - it is a lack of calcium and my
body's inability to absorb it.

So, being poor as hell, I have been considering doing my own dental repairs.
I have already looked into going to dental schools and medicaid clinics, but
neither are an option.  Dental school is still more money than I have to
spend and the medicaid clinic here will not take on any new patients as they
have lost all but one dentist.  I make too much money for assistance or
medicaid but not enough to afford to pay what is being charged for treatment
here and I have no insurance.

So far I have only used tools to smooth down sharp areas where teeth have
broken off to prevent my cheeks and tongue from being shreaded.  Now I would
like to fix a couple of fillings that have fallen out or are in need of
replacement due to the breakage of parts of the tooth.  I do not have access
to a curing light and have looked at the prices and really cannot afford to
purchase one.  So, after all that rambling, here is the question:

What dental filling material is there that is not amalgam, cures without a
light, and would serve to fill these holes?  Specifically I am looking for
the product names (brand name, etc) so that I can find it online and order
it.  And, is there something that can be painted onto all of my teeth that
would prevent the teeth from further caries and breakage?  Like a paint on
enamel or sealant maybe?

Thanks for any help you can provide, Aria