amalgam

amalgam

1. Alloy powder mixed with mercury

   • silver upto 70%
     • copper upto 30%
     • tin variable quantities
     • zinc small quantities

2. finishing burs

   • more cutting blades than usual
   • used on a slow hand piece
   • flame, pear, round and oval in shape

3. mercury poisoning

   • inhalation- vapours
   • absorption- through skin
   • indgestion

4. waste amalgam

   • hazardous waste in sealed container

5. mercury spillages

   • smalll
     • globules drawn up in disposable IV syringe
       • damp paper towel
         • all transferred to mercury container
   • large
     • stop work! full PPE
       • mercury smeareed with absorbant paste
         • calcuim hydroxide
         • flours of sulpher
         • left to dry
           • wet disposable towel disposed in mercury container
             • Enviromental health informed
               • health & safety executive informed undeer RIDDOR