[Measurements of the mercury vapour concentration of the room air during dosing and trituration of amalgam by DMG 410].

The testet mechanical amalgamators DMG 410 (VEB Dentalfabrik Treffurt) showed sufficient tightness. After dosing and trituration of 5 (during 30 min) and of 25 amalgam mixtures (during 2 hours) an increase of the mercury vapour concentration was measured from 0.003 mg Hg/m3 air of the room (blank value) to 0.008 mg Hg/m3 air of the room and to 0.018 mg Hg/m3 air of the room in an unventilated room. A significant decrease of the mercury vapour concentration could be established within 10 minutes by ventilation of the measurement room.