Petri dish Petri dish A Petri dish (sometimes spelled "Petrie Dish" and alternatively known as a Petri plate or cell-culture dish), named after the German bacteriologist Julius Richard Petri, is a shallow cylindrical glass or plastic lidded dish that biologists use to culture cellssuch as bacteriaor small mosses. Modern Petri dishes usually feature rings and/or slots on their lids and bases so that when stacked, they are less prone to sliding off one another. Multiple dishes can also be incorporated into one plastic container to create a "multi-well plate". While glass Petri dishes may be reused after sterilization (via an autoclave at
Osteomyelitis of the jaws wall to keep the area of infection localized. Micro-organisms which are sufficiently virulent may destroy this barrier. Factors which may contribute to this are decreased host resistance, surgery or repeated movement of fracture segments, as may occur with an untreated fracture. Mechanical trauma burnishes the bone, causing ischemia by crushing blood vessels and seeds micro-organisms into the tissues. The events preceding OM are acute inflammatory changes such as hyperemia, increased capillary permeability and infiltration of granulocytes. Proteolytic enzymes are released, and thrombus formation in the blood vessels and tissue necrosis occur. Pus accumulates in the medullary spaces of the bone,