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.
The failure of Britain and France to resist Hitler's flouting of the treaty would open the way for unlimited German rearmament, and take Germany on its first step towards World War II. Hitler sends German troops into the Rhineland in breach of the Treaty of Versailles.itler builds the first of Nazi Germany's pocket battleships in breach of the Treaty of Versailles. The successful repudiation by Hitler of one of the key terms of a treaty despised by most Germans produced celebrations across Germany, and greatly increased Hitler's standing with the German people.