A Master thesis titled (Preparation and Characterization of Ceramic/Polymer Dental Composite CAD/CAM and study the Effect of Nano ZrO₂ on their Physical and Mechanical Properties for Using as Dental Prothetic Materials. was defended at College of Science, Department of Physics on )March 19, 2024  ), for the postgraduate Candidate  Ayat Mahdi Khalaf. The aim of the thesis is Manufacture of new prosthetic dental materials from CAD/CAM composites according to international specifications ISO (6872:2008) that can be used in CAD/CAM technology by taking advantage of cheap materials available in the Iraqi environment, such as oyster shells, reinforced with nano-zirconium, as these materials consist of fillers. (Filler) High quality ceramic mixed with polymer.