触覚センサーと超音波厚さ計を用いた義歯床下粘膜のバイオメカニクス特性評価

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  • Assessment of Biomechanical Characteristic of Denture Supporting Tissue using an Ultrasonic Thickness Gage and a Tactile Sensor

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Purpose: For an appropriate diagnosis of removable denture patients, it is important to assess the biomechanical characteristics of denture supporting tissue. To establish a comprehensive assessment of biomechanical characteristics, the relationship between the elasticity and thickness of denture supporting tissue was examined.<BR>Methods: Three parts of the hard palate of ten dentate subjects with healthy palatal mucosa were measured: lateral part of first molar, lateral part of palate, and median part of palate. The elasticity was measured with a tactile sensor and thickness with an ultrasonic thickness gage.<BR>Results: Young's modulus was highest at the median part of the palate (2.4±0.8 MPa) and lowest at the lateral part of the palate (1.0±0.5 MPa). The thinnest part was the lateral part of the palate (1.2±0.3 mm) and the thickest part was the median part of the palate (2.8±0.7 mm). Young's modulus and the thickness of mucosa indicated a negative linear relation. However, values of Young's modulus were distributed widely where the mucosa is thin.<BR>Conclusion: Values of Young's modulus were distributed widely where the mucosa is thin. Therefore Young's modulus cannot be estimated from only the thickness. To establish a comprehensive assessment of the biomechanical characteristics of denture supporting tissue, both elasticity and thickness should be evaluated simultaneously.

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