Tympanomastoid surgery is needed for the chronic draining ear or in the case of a cholesteatoma. This surgery involves the middle ear space as well as the mastoid and usually the incision may be through the tympanic membrane (eardrum) or behind the ear. 1 = Mastoid Bone 2 = Middle Ear 3 = Tympanic membrane (eardrum).his surgery involves the middle ear space as well as the mastoid and usually the incision may be through the tympanic membrane (eardrum) or behind the ear. 1 = Mastoid Bone 2 = Middle Ear 3 = Tympanic membrane (eardrum).
After WW1, they built the Maginot Line, along their border with Germany. This was a massive defensive fortifiations with underground bunkers that could be used for troops and support and command and control. In 1940, the Germans defeated this defensive line by attacking through Belgium and going around it.
World War II is over and Berlin is divided into 4 sectors: the American, British, French in the West and the Soviet in the East. At the instigation of the Soviet Military administration the demarcation line between East and West Germany is safeguarded.orld War II is over and Berlin is divided into 4 sectors: the American, British, French in the West and the Soviet in the East. At the instigation of the Soviet Military administration the demarcation line between East and West Germany is safeguarded.