الفهرس 
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Abstract
This study was carried out to compare between the effect of using conventional and digital oral positional radiation stent on healthy tissues, salivary PH and patient satisfaction. Materials & methods: A clinical study, included 16 patients with HNC, patients were divided into 2 groups, group A: OPRS was constructedaccording to the conventional technique. group B: OPRS was constructed digitally using CAD /CAM technology. Methods of evaluation: Dosimetric analysis, PH of saliva measurement, assessment of Mucositis and Patient satisfaction, and at the end the data collected, tabulated and statistically analyzed.