In patients undergoing upper gastrointestinal endoscopy, benign oesophageal strictures were significantly more frequent (p less than 0.01) in those with severe tooth loss than in controls of the same age. This may be because of edentulous patients eating less solid and more liquid food, which would otherwise dilate the lower oesophagus, or poor salivary flow leading to both tooth loss and impaired neutralisation of refluxed gastric acid, or malnutrition. No association was found, however, between either oesophagitis or hiatus hernia and dentition.
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