Validation of a purpose-built chewing gum and smartphone application to evaluate chewing efficiency.

Objectives: To validate a purpose-built two-coloured chewing gum (Hue-Check Gum ), and to test the accuracy of a custom-built smartphone application for a colour-mixing ability test to assess chewing function.

Methods: Fully dentate participants (28D-group) and edentulous participants with implant overdentures (IOD-group) were recruited. They chewed a Hue-Check Gum for 5, 10, 20, 30 and 50 chewing cycles, respectively.