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Stereognosis is the ability to recognize and discriminate forms Oral stereognostic ability has been studied in different reports The experimental design of the test is of primary importance as both the method used and the material applied may influence the results dramatically The form, size and surface characteristics of the test piece , the presentation order, subject related factors and method of scoring all have their effect on the results Edentulous subjects usually show a decreased oral stereognostic ability. A number of questions have been addressed, especially with regard to the perception itself. The following review tries to deal with these questions and attempts to provide clear guidelines for further research on oral stereognosis.