الفهرس 
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Abstract
Objectives: This study aimed to determine the oral manifestations associated with dry mouth (xerostomia) and the possible causes of it. Participants: 500 subjects aged 11- 64 years of both sexes suffering from xerostomia were selected from out patient’s clinic of Mansoura University Hospitals and Faculty of Dentistry. Method: Confirmation of xerostomia was done by measuring of the unstimulated and stimulated saliva. Also questionnaire was done which included sociodemographic indicators, oral manifestations of xerostomia(fissured tongue, fissured lip and candida infection), (DMFT, OHI-S,PI,GI) indices, oral hygiene measures, dental visit, dietary behaviors and medical history. Result: Xerostomic subjects who had fissured tongue were 98.6%, fissured lip were 82.4% and candida infection were 53.8%. Xerostomic subjects had fair DMFT index mean (10.54+4.33), while there was a statistical significant relation between the xerostomia with fair OHI index (1.74+0.46). Xerostomic subjects had high PI and GI with means of (2.69+1.05) and (2.25+0.46) respectively. Xerostomic subjects whose ages (46-64) were (61.4%) of all the participants, (51.4%) were female, and those who lived in rural areas were (61.8%).Most of the xerostomic subjects (89.2%) experienced the diseases that cause xerostomia for more than one year. Cancer patients were (25%) while diabetics were (22.8%) of the selected xerostomic group. Conclusion: Older females who lived in rural areas were more appropriately to have xerostomia, while educational level had no significant difference with xerostomia. In this study most of the xerostomic subjects were suffering from cancer and diabetes mellitus. Xerostomia had significant difference with each of fair DMFT, fair OHI, gingival bleeding and periodontal diseases. Also there were significant relations between xerostomia and fissured tongue, fissured lip and candida infection. Identification of underlying causes and accurate technical methods to diagnose xerostomia will help in getting better prevention and management.