الفهرس 
Introduction .Only 14 pages are availabe for public view
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Abstract
This in vitro study was conducted to evaluate the accuracy of RPD metal framework constructed by direct milling technology versus indirect technique by printing.
This study was applied on a ready-made maxillary stone cast used for educational purpose (Kennedy class II modification 1) that divided into two groups.
group A: Six Co-Cr frameworks were constructed by printing the resin pattern then converted to metal using lost wax technique.
group B: Six Co-Cr frameworks were constructed by directly milling Co-Cr blanks.
Scanning of the study model and designing of each component of the framework was done using the partial denture module in exocad software to produce an STL file.
In the group A the STL file was used to print the design from resin which was sprued, invested and casted by lost wax technique into Co-Cr metal framework. In group B the STL file was used to mill the design from Co-Cr blank to directly produce Co-Cr frameworks. These steps were repeated to produce twelve frameworks, six in each group.
The accuracy of partial denture frameworks was evaluated by using computer matching system. The accuracy of the occlusal rest and the fit between the two data was done at three axes X, Y and Z. each framework was evaluated compared to the main design using geomagic control X. Data was collected and statistically analyzed.
Regarding the results of accuracy of the occlusal rest, it was found that the least deviation was found in group B. There was a statistically significant difference between the two groups.
Regarding the results of accuracy at three axes X, Y and Z, it was found that the least deviation was found in group B. There was a statistically significant difference between the two groups.