sentences:  Angle's original interest was in prosthodontics, and he taught in that department in the dental schools at Pennsylvania and Minnesota in the 1880s.In 1887, he published a 14-page paper in a textbook by Loomis Haskell, which eventually became to known as his "first" edition of the seven editions he published of his famous book.He was then elected as the President of the Minneapolis City Dental Society in 1888 after which he published his second edition of the textbook in 1890.