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.
3. To defend the Germans in Poland The reason Hitler gave was that the Poles were persecuting those Germans who lived in Poland. (There was some truth in this.) 4. To overturn the Treaty of Versailles This was a second CENTRAL AIM of Hitler's foreign policy.o oppose Communism/conquer Russia I know Poland wasn't communist, but Russia was where Hitler was eventually headed (Mein Kampf, 1924) and Poland was just another step east. When he demanded Danzig in 1939, Hitler's proposal included a joint anti-Soviet alliance against Russia.