Thanks to Jenkins’ persuasion Wagner cancelled his plans to emigrate to America. Parsifal premiered at the second Bayreuth Festival on July 26, 1882 in Bayreuth. Career Jenkins was for a long time ignored by dental historians despite his high achievements in dentistry. He published 32 scientific articles about improving aesthetic tooth restoration with porcelain fillings, methods that were partly patented. Introduction of the rubber dam in Germany Jenkins had his first success introducing the rubber dam in Germany, two years after it had been developed 1864 by the New York dentist Sanford Christie Barnum. The rubber dam is an elastic band, which isolates the tooth to be treated from the oral cavity especially against liquids and saliva. Originally it was used to keep the working area dry because at that time there was no dental suction apparatus. Development of porcelain masses Jenkins developed and improved porcelain enamel, thus making a composition of porcelain paste into porcelain inlays, dental crowns and bridges and the associated processing equipment. It was helpful living close to Sächsische Porzellanmanufaktur Dresden (Saxon Porcelain Manufactory in Dresden). He also developed steel drills, which were coated with diamond dust, to create a smooth cavity. The porcelain inlays opened for the first time the possibility to produce tooth-colored anterior restorations and thus initiated the era of esthetic dentistry. At that time fillings were usually made of gold in the anterior region. For the production and distribution of "Jenkins Porcelain Enamel" he founded the manufactory Klewe & Co. His personal friend, a certain Samuel Langhorne Clemens bought the manufacturing and distribution rights for the US market. This man became known by his pseudonym as the writer Mark Twain. Development of the toothpaste Kolynos Together with Willoughby D. Miller, who set up in 1890 the pioneering and still valid theory that bacteria of the oral flora degrade carbohydrates to acids, that damage the enamel and allow bacteria to access and destroy the dentin by caries, Jenkins developed a toothpaste and named it Kolynos, the first toothpaste containing disinfectants. The name´s origin is Greek Kolyo nosos (κωλύω νόσος), meaning "disease prevention". Numerous attempts to produce the toothpaste by pharmacists in Europe were uneconomic. After returning to the US, he continued experimenting with Harry Ward Foote (1875-1942), professor of chemistry at Sheffield Chemical Laboratory of Yale University. After 17 years of development of Kolynos and clinical trials Jenkins retired and transferred the production