Department of Geriatric Dentistry, School of Dentistry, Showa University, 2-1-1 Kitasenzoku, Ota-ku, Tokyo 145-8515, Japan.
J Prosthodont Res. 2013 Oct;57(4):275-83. doi: 10.1016/j.jpor.2013.07.002. Epub 2013 Sep 21.
The present study was designed to clarify the relationship between the properties of the palatal mucosa and the pressure-pain threshold.
Three parts of the palatal mucosa of 17 dentate subjects were measured: the median part of the palate, the lateral part of the first molar, and the midpoint between these two parts. The subjects were instructed to press a pushbutton when he or she felt pressure-pain. The probe pressure was gradually increased (1N/s). The thickness (T) (mm) and elasticity (E) (MPa) were used as the parameters of the properties of the palatal mucosa, whereas pressure (P) (MPa), compressibility (C) (%), and subsidence (S) (mm) were used as the parameters of the pressure-pain threshold. The Shapiro-Wilk test was used to consider the data of distribution of normality for each measurement point, as obtained from the 17 subjects. A Kruskal-Wallis test and a Wilcoxon signed rank test were performed for multiple comparisons, the Bonferroni method was used to compensate for the P-value. Spearman's rank correlation coefficient was calculated.
T correlated with the values of S at the median points (P=0.001) and midpoints (P=0.011).
Thickness can be an index of the amount of relief where pain is caused easily. In addition, modulus of elasticity is important as an indicator of the bearing ability of denture support tissues, it is necessary to consider how to evaluate the modulus of elasticity and to evaluate the relationship between the parameters of the pain threshold.
本研究旨在阐明腭黏膜特性与压痛阈之间的关系。
测量 17 名有牙受试者的腭黏膜三个部位：腭中部、第一磨牙侧部和这两个部位的中点。嘱受试者在感到压痛时按下按钮。探头压力逐渐增加（1N/s）。厚度（T）（mm）和弹性（E）（MPa）用作腭黏膜特性的参数，而压力（P）（MPa）、可压缩性（C）（%）和沉降（S）（mm）用作压痛阈的参数。采用 Shapiro-Wilk 检验对每个测量点的正态分布数据进行考虑，从 17 名受试者中获得。采用 Kruskal-Wallis 检验和 Wilcoxon 符号秩检验进行多重比较，Bonferroni 法补偿 P 值。计算 Spearman 秩相关系数。
T 与中点（P=0.001）和中点处 S 值相关（P=0.011）。
厚度可以作为容易引起疼痛的缓解量的指标。此外，弹性模量作为义齿支持组织承载能力的指标很重要，有必要考虑如何评估弹性模量，并评估疼痛阈值参数之间的关系。
