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Where, A = the lowest point of the pulp chamber roof, B = the highest point of the pulp chamber floor, and C = the longest root’s apex. Using this formula, a tooth is a taurodont if the landmark ratio is ≥ 0.2 and the distance from the highest point of the pulp chamber floor (B) to the cemento-enamel junction (D) is ≥ 2.5 mm. The full ...
World War II [b] or the Second World War (1 September 1939 – 2 September 1945) was a global conflict between two coalitions: the Allies and the Axis powers. Nearly all the world's countries—including all the great powers—participated, with many investing all available economic, industrial, and scientific capabilities in pursuit of total war, blurring the distinction between military and ...
In tooth gemination, the pulp chambers and root canals tend to be joined, unlike in tooth fusion where they tend to be separate. However, the degree of separation will depend on the stage of tooth development when the gemination occurred, so the pulp chamber and/or root canal may or may not be involved. [1]
Strategic bombing during World War II in Europe began on 1 September 1939 when Germany invaded Poland and the Luftwaffe (German Air Force) began bombing Polish cities and the civilian population in an aerial bombardment campaign. [33]
German-occupied Europe (or Nazi-occupied Europe) refers to the sovereign countries of Europe which were wholly or partly militarily occupied and civil-occupied, including puppet governments, by the military forces and the government of Nazi Germany at various times between 1939 and 1945, during World War II, administered by the Nazi regime under the dictatorship of Adolf Hitler.
A formation of Spitfires shortly before World War II. This is a list of World War II battles encompassing land, naval, and air engagements as well as campaigns, operations, defensive lines and sieges. Campaigns generally refer to broader strategic operations conducted over a large bit of territory and over a long period.
The use of foreign forced labour and slavery in Germany and throughout German-occupied Europe during World War II took place on an unprecedented scale. [67] It was a vital part of the German economic exploitation of conquered territories. It also contributed to the mass extermination of populations in German-occupied Europe.
The Allied leaders of the European theatre (left to right): Joseph Stalin, Franklin D. Roosevelt and Winston Churchill meeting at the Tehran Conference in 1943 The Allied leaders of the Pacific War: Chiang Kai-shek, Franklin D. Roosevelt, and Winston Churchill meeting at the Cairo Conference in 1943 French postcard illustrating the alliance between Poland, France and the United Kingdom (1939 ...