Determination of the Relationships Between intra- and Extraoral Tongue Hardness, Thickness, and Pressure Using Ultrasoni
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ORIGINAL ARTICLE
Determination of the Relationships Between intra‑ and Extraoral Tongue Hardness, Thickness, and Pressure Using Ultrasonic Elastography Keina Miura1 · Mai Ohkubo1 · Tetsuya Sugiyama2 · Masahito Tsuiki1 · Ryo Ishida1 Received: 7 November 2019 / Accepted: 24 August 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Involved with various bodily functions, including ingestion and swallowing, the tongue is an important organ. We measured resting tongue hardness using real-time tissue elastography (RTE) to establish a simple tongue evaluation for patients who may have limited capacities to follow commands. Relationships between tongue hardness, thickness, and pressure were investigated, using both intra- and extraoral probes. Assessments were performed for a total of 27 healthy adults (11 male, 16 female, average age 26.4 ± 1.8 years). Measurements of tongue hardness and thickness were made using strain ratios (SR), and averaged across nine images. Maximum tongue pressure was determined using a tongue pressure device. A negative correlation was observed between intraorally measured tongue hardness and maximum tongue pressure (r = −0.76, p
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