الفهرس 
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Abstract
This study was performed to compare the effect of two different techniques of denture bases processing (conventional heat curing and cad/cam) on the retention of the maxillary complete denture.
The study was carried out on sixteen completely edentulous patients, divided into two groups (A) and (B).
group (A) patients received conventional heat cured acrylic resin dentures with long cycle water path curing technique, while group (B) received CAD/CAM dentures designed with computer and fabricated by milling technique.
The retention was measured using Digital force-meter gauge, which applied a pulling force on a metallic hook attached to the geometric center of the maxillary dentures for both groups.
The mean retention values were recorded for both groups, tabulated and statistically analyzed and the following results were obtained:
1. Regarding the conventional acrylic dentures (group A), retention values showed significant increase at the beginning of the study as well as at the end of the study.
2. Regarding the CAD/CAM dentures (group B), retention values showed a significant initial increase at the beginning of the study, till the end of the study.
3. A significant difference was revealed between the mean retention values of the two tested groups at the end where the other periods of all the recorded intervals, with clear superiority of the retention of the CAD/CAM acrylic resin dentures (group B) than that of the conventional heat cured acrylic resin dentures (group A).