Gustav Preiswerk - Lehrbuch und Atlas der Zahnärztlichen
Gustav Preiswerk - Lehrbuch und Atlas der Zahnärztlichen Technik - München, Lehmann's, (publisher) - 442 pages + 22 pages advertising with 21 multi-colored tables and 362 black and colored illustrations - Embossed printed canvas cover with gold print and red head cut - 20 x 14 cm. Outside good, inside good, binding slightly loosened.The origins of dental gold restorations lie in antiquity. During excavations in Egypt, first gold fillings on mummies were discovered. So it was probably already around 200 A.D. possible to produce metal coatings with the help of galvanic batteries. First in 18th centurydental prosthesis were developed by the French dentists Fouchard, Jourdain and Bourdet. Gustav Preiswerk reports in this „Lehrbuch und Atlas der zahnärztlichen Technik“ for the first time on cast gold surfaces. In doing so, the chewing surfaces built up from wax were pressed into the molding material ossa sepia, recommended by Eugen Cohn, and a counter made of the same material was poured. The gold melted on a piece of wood charcoal was filled into the resulting mold. Read More