Characterization and modeling of a planar ultrasonic piezoelectric transducer for periodontal scalers

Stutzer, Diego; Hofmann, Martin; Wenger, Dominik; Harmouch, Khaled; Lenoir, Deirdré; Burger, Juergen; Niederhauser, Thomas (2023). Characterization and modeling of a planar ultrasonic piezoelectric transducer for periodontal scalers. Sensors and Actuators A, 351, p. 114131. Elsevier 10.1016/j.sna.2022.114131

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Caries and periodontitis affect the majority of adults during their lifetime. Piezoelectric ultrasonic scalers offer great benefits during the prevention and treatment of periodontal diseases. Our group developed a novel ultrasonic periodontal scaler based on a planar piezoelectric transducer. However, similar to other piezoelectric configurations, the transducer’s characteristics are strongly influenced by operation conditions. In this study, we investigated the influence of driving voltage amplitude and loading force applied using physical calculus models on the novel planar transducer’s input impedance and vibration. Our results show that the resonance frequency, i.e. the frequency at which maximal deflection of the tip occurs, decreases with increasing driving voltage amplitude while it increases with increasing force. Additionally, decreasing driving voltage amplitudes and increasing force both increase the minimal magnitude and reduce the maximal phase of the input impedance near resonance. Based on these observations, we developed a procedure to extend the Butterworth–Van-Dyke (BVD) Model. The extended BVD models allow to simulate the transducer in realistic scenarios and may facilitate the development of dedicated control systems for planar piezoelectric transducers.

Item Type:

Journal Article (Original Article)


04 Faculty of Medicine > Faculty Institutions > sitem Center for Translational Medicine and Biomedical Entrepreneurship
08 Faculty of Science > School of Biomedical and Precision Engineering (SBPE)

Graduate School:

Graduate School for Cellular and Biomedical Sciences (GCB)

UniBE Contributor:

Hofmann, Martin, Burger, Jürgen


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








Martin Hofmann

Date Deposited:

15 Feb 2023 15:45

Last Modified:

15 Feb 2023 23:28

Publisher DOI:





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