الفهرس 
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Abstract
This study was designed to investigate effect of two fabrication techniques (Full anatomical and Framework then veneering) and cement space (20 μm, 30 μm and 50 μm) on the vertical marginal gap of zirconia bridges before and after veneering and glazing A specially fabricated stainless-steel dies simulating a prepared mandibular second premolar tooth and mandibular second molar tooth were
fabricated. A total number of thirty FPDs were constructed and classified into 2 equal groups, 15 each, according to the fabrication technique; Full
anatomical and Framework then veneering.
Each of the previously mentioned two groups was sub-classified into 3
equal sub-groups, 5 each, according to cement space; 20 μm, 30 μm and 50
μm. The full anatomic zirconia FPDs (inCoris TZI) were designed and
milled by Cerec inLab were fabricated with standard dimensions as
controlled by the Cerec inLab software.
The zirconia frameworks (inCoris ZI) were designed and milled by
Cerec in-Lab. Then veneered by press on technique following a standard
procedure using a specially designed and milled wax pattern for the
purpose of standardization and finally glazed.
The samples were tested for vertical marginal fit using a scanning
electron microscope using a fixed magnification of 150X. The data obtained
were collected, tabulated and subjected to statistical analysis.