Gummy bear-based gnathodynamometer for masticatory diagnostics

Donghyun Lee, Beelee Chua

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


We have demonstrated the feasibility of a gummy bear-based gnathodynamometer for masticatory diagnostics. Using a gummy bear as a force transducer and bamboo cantilevers as mechanical springs, the masticatory force of a human mandible can be measured via electrical impedance measurement (presented as the output voltage of the gnathodynamometer). The frequency response of the gummy bear is experimentally tested from 0.1 to 100 kHz and shown to be consistent with the analytical model. For a given driving frequency, the output voltage of the gnathodynamometer is experimentally measured for a range of stimulated masticatory forces (˜3.49 to 88.50 N). The masticatory force limit is also adjustable via the driving frequency (10 to 100 kHz) and cantilever length (via sliding datum, L = 95, 75, and 50 mm). This also adjusts the masticatory force sensitivity in the range of ˜17.5 to 40.5 mV/N. The clinical feasibility is also evaluated using three human subjects. The combination of candy (gummy bear) and diagnostics heralds a new class of low-cost medical devices that generate minimum recalcitrant medical waste and that are suitable for developing countries.

Original languageEnglish
Pages (from-to)80-89
Number of pages10
JournalSensors and Actuators, A: Physical
Publication statusPublished - 2019 May 1

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea ( NRF-2015R1D1A1A01060317 and NRF-2017R1A2B4005133 ). The authors would also like to thank Prof. Ahjeong Son at Ewha Womans University, Seoul, Republic of Korea for the laboratory resources and support as well as Hyowon Jin for her laboratory assistance.


  • Diagnostics
  • Force transducer
  • Gnathodynamometer
  • Gummy bear
  • Masticatory force

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering


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