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

Buser, Ramona; Ziltener, Valerie; Samietz, Stefanie; Fontolliet-Siewczyk, Marta; Nef, Tobias; Schimmel, Martin (2018). Validation of a purpose-built chewing gum and smartphone application to evaluate chewing efficiency. Journal of oral rehabilitation, 45(11), pp. 845-853. Blackwell Scientific Publications 10.1111/joor.12696

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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.

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. Maximum voluntary bite force (MBF) was assessed with a digital gauge. The specimens were analysed according to their colour mixture (variance of hue, VOH) with a validated software (VOH_scan) and a newly developed smartphone application (VOH_app).

Participants segregated by dental state were significantly different regarding the number of occluding pairs of teeth, age and MBF. VOH_scan showed a negative logarithmic association with the number of chewing cycles, and VOH could be predicted from chewing cycles, MBF and gender. The clearest discrimination between the IOD and the 28D groups was observed for n = 20 chewing cycles; at this point, VOH was distinguishably different with a P-value < 0.0001. The VOH_app was a very good predictor for VOH_scan with 0.80 < pseudo-R2 < 0.83, depending on light exposure and measuring distance. There was, however, a systematic error in the accuracy of the app for inadequately chewed specimens.

The use of the two-coloured chewing gum would provide a fast, simple and inexpensive method for the assessment of masticatory performance, which could be used in geriatric wards or in private practices without the requirement of specialised equipment or trained staff.

Item Type:

Journal Article (Original Article)


04 Faculty of Medicine > School of Dental Medicine > Department of Reconstructive Dentistry and Gerodontology
10 Strategic Research Centers > ARTORG Center for Biomedical Engineering Research > ARTORG Center - Gerontechnology and Rehabilitation

UniBE Contributor:

Buser, Ramona, Fontolliet, Marta, Nef, Tobias, Schimmel, Martin


600 Technology > 610 Medicine & health
600 Technology > 620 Engineering




Blackwell Scientific Publications




Angela Amira Botros

Date Deposited:

07 Aug 2018 09:38

Last Modified:

02 Mar 2023 23:31

Publisher DOI:


PubMed ID:





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