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.
On September 1 1939 Nazis Germany invaded Poland and took over EASTERN Poland. What many people either don t know or remember is on September 17, 1939 the Soviet Union invade WESTERN Poland. The first country that fought back with Nazis Germany where shots were fired was Poland.darrell Â· 3 months ago.n September 1 1939 Nazis Germany invaded Poland and took over EASTERN Poland. What many people either don t know or remember is on September 17, 1939 the Soviet Union invade WESTERN Poland. The first country that fought back with Nazis Germany where shots were fired was Poland. darrell Â· 3 months ago.