| http://www.w3.org/ns/prov#value | - Considering that, for an effective washing of teeth root canals, it is usually necessary to use two liquids, in particular hydrogen peroxide and sodium hypochlorite, injected one after the other, it is immediately obvious that the instruments used up to now are quite insufficient, mainly from a practical viewpoint, in that they must be filled in sequence with said two different liquids with result
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