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.
This is because Britain and France feared a strong Germany. And they made the first move by declaring war on Germany first, therefore Britain and France started World War II. Germany and the Soviet Union invading Poland does not constitute World War II, particularly if no other nations got involved.lso, Germany had an Alliance with Russia who invade Poland from the East at the same time. So if I'M not mistaken, you had Britain and France slowly responding to an invasion of Poland, an Ally by Treaty, by Germany and Russia, thereby instigating the Second World War.