Stent out. Others attribute the noun "stent" to Jan F. Esser, a Dutch plastic surgeon who in 1916 used the word to describe a dental impression compound invented in 1856 by the English dentist Charles Stent (1807–1885), whom Esser employed to craft a form for facial reconstruction. The full account is described in the "Journal of the History of Dentistry". According to the author, from the use of Stent's compound as a support for facial tissues evolved the use of a stent to hold open various bodily structures. The first (self-expanding) "stents" used in medical practice in 1986 by Ulrich Sigwart
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