The dentist use a variety of instruments to put  the amalgam to the cavity preparation and properly condense it . Condensers and Amalgam carriers are used for this purpose. Amalgam Carriers 

Amalgam carriers transport the prepared amalgam restorative material to the cavity preparation. Amalgam carriers have hollow working ends. They are called barrels and amalgam is packed into it for transportation. Single and Double-ended carriers are available with different barrel sizes like mini, large, and jumbo. The amalgam is ejected into the cavity preparation by pressing the lever (located on the top of the carrier) . Two carriers are used during the amalgam placement procedure normally. This saves the refilling time for the dentist who is ejecting or condensing a carrier load. The Amalgam carriers should be packed properly otherwise it may fall out before it is ejected into the cavity preparation. Eject any remaining amalgam alloy from the carrier into the amalgam well after amalgam material placement is completed. When the amalgam is allowed to harden in the carrier, it is no longer serviceable.

                                                                 Veecare  Amalgam Carrier

Condensors

  Amalgam condensers, often called pluggers, are used to condense or pack the amalgam filling materials into the cavity preparation. The working end is large enough to compress the soft amalgam without sinking into it. They come in single and double ended designs. They come in various shapes and size of working ends, which may be smooth or serrated. 

                                                                 Veecare Condensor

https://www.veecarestores.com/category/endodontics-restorative/condensers/

https://www.veecarestores.com/category/endodontics-restorative/amalgam-carriers/