Jan F. Esser Jan F. Esser Johannes "Jan" Fredericus Samuel Esser (13 October 1877 in Leiden – 9 August 1946 in Chicago) was a Dutch plastic surgeon who pioneered innovative methods of reconstructive surgery on soldiers wounded in the First World War. He is thought to have coined the term "stent" in 1917 to describe his use of a dental impression compound invented in 1856 by the English dentist Charles Stent (1807–1885) to create a form for facial reconstruction. The term "stent" was later extended to mean a device to expand constricted tubes of body tissue. He was a one time Dutch Chess
Piano extended technique inserted between the strings or attached to the hammers. John Cage pioneered this technique. He worked with another pioneer in the field of extended techniques, David Tudor. Pianos have also been constructed that include microtones (and extra keys to hit their strings). Piano extended technique Piano extended techniques are those in which unorthodox or unconventional techniques are used to create the sound. Though some of these techniques had been explored by earlier composers—Robert Schumann introduces the silent pressing technique into his "Carnaval" (at the end of "Paganini")—the use of these techniques was not widely practised until the 20th century. Composers