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.
(To eliminate the possibility of the Soviet Union fighting if Poland were attacked, Hitler made a pact with the Soviet Union-the Nazi-Soviet Non-Aggression Pact .). So that Germany did not officially seem the aggressor (which it was), Hitler needed an excuse for attacking Poland.y Jennifer Rosenberg. No one wanted war. Yet, when Germany attacked Poland on September 1, 1939, other European countries felt they had to act. The result was six long years of World War II. Learn more about what led to Germany's aggression and how other countries reacted.