no they haven't punctured the sinus cavity, i had an inspection at the time and x rays as they thought the accident could have broken my nose.
the material was gutta percha a latex based product. my dentist sent me the ingredients which include heavy metal sulfates and zinc oxide. i'm certain i was sensitive to the material and that the initiating exposure, the first root canal, sensitised me to the second treatment and caused all this. i just don't know how long it can take to see improvements after removing a chemical irritant. straight after the second one my pains and main symptoms really set in