Development of a Digital Sialometry Device for Minor Salivary Glands With Enhanced Volume Range and Precision: A Technical Report

To address the measurement limitations of a previously developed electronic device for sialometry of minor salivary glands, an improved version was developed to enable accurate assessment of larger saliva volumes. The device estimates saliva volume by calculating the electrical impedance of a filter paper that has absorbed saliva, using a microcontroller-based digital method. A calibration curve was generated using physiological saline, adjusted to match the conductivity of human labial gland saliva. The improved device can measure saliva volumes up to 9.0 μL using a 10 mm square filter paper, significantly expanding the measurable range compared to the previous version. This enhancement increases both the precision and applicability of minor salivary gland sialometry, contributing to a more reliable assessment of salivary function in clinical and research settings.