Nihon Hotetsu Shika Gakkai Zasshi
Online ISSN : 1883-177X
Print ISSN : 0389-5386
ISSN-L : 0389-5386
Biomechanical Evaluation of Denture Supporting Soft Tissues
A Method for Objective Assessment of the Elasticity of the Mucous Membrane
Satoshi HaraOsamu ShimodairaYuji SatoNoboru KitagawaYumiko Hosono
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2007 Volume 51 Issue 2 Pages 280-290

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Abstract
Purpose: Objective assessment of the hardness of the mucous membrane to assess the biomechanical characteristics of denture supporting tissues by subjective sensation at problem of reproducibility and universality is important in removable denture treatment. The purpose of this study was to establish an objective assessment of mucous membrane, to clarify the influence of the fixation method and contact angle of the tactile sensor probe on the measurement value and to grope for the correction method.
Methods: The elasticity of simulated mucosa made from four different kinds of materials was measured using a tactile sensor. A probe guide was fabricated in order to regulate the contact angle of the tactile sensor and to prevent the tip of the probe from slipping. The effects of the contact angle, fixation method and installation of probe guide were analyzed. In addition, the mucosal elasticity was measured in vivo. Results: The measurement results indicated that when inclined to 30°, the degree of elasticity was greater than that at 0°. The simulated mucosa, the contact angle, and the fixation method were all significant (P<0.01) from three-way ANOVA. The elasticity at different contact angles showed a straight line relationship. It was presumed the degree of elasticity of 0° from the degree of elasticity inclined to 30° because of the error margin within 16% by the regression analysis.
Conclusion: The influence of contact angle and fixation method of the tactile sensor probe was clarified. As for the correction by regression and calculation of the elasticity, the possibility of objectively appreciating the hardness of the mucous membrane that the denture supporting tissue was suggested.
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© Japan Prosthodontic Society
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