Education
He studied medicine in Vienna, where he was an assistant to Georg Carabelli (1787-1842).
He studied medicine in Vienna, where he was an assistant to Georg Carabelli (1787-1842).
In 1858 he became an associate professor at the University of Vienna. Heider was a pioneer of modern dentistry, being remembered for introducing electrosurgery (Galvanokaustik) into dentistry. He is also credited for being the first dentist in a German-speaking country to use a procedure called Goldhämmerfüllungen, a technique used for installing gold fillings.
In 1861 he founded the Vereins österreichischer Zahnärzte (Austrian Association of Dentists), known today as the Österreichische Gesellschaft für Zahn-, Mundund Kieferheilkunde or ÖGZMK (Austrian Society of Oral and Maxillofacial Surgery).
With histopathologist Carl Wedl (1815-1891), he was co-author of the highly regarded Atlas zur Pathologie der Zähne, a work later translated into English and published as "Atlas to the Pathology of the Teeth".