Department of Removable Prosthodontics, Nihon University School of Dentistry at Matsudo, Matsudo, Japan.
Nihon University Graduate School of Dentistry at Matsudo, Removable Prosthodontics, Matsudo, Japan.
J Prosthodont Res. 2019 Jul;63(3):299-302. doi: 10.1016/j.jpor.2019.01.001. Epub 2019 Feb 10.
This study aimed to investigate whether the mandible is more receptive to external stimuli than the maxilla in patients with complete dentures by comparing regional current perception thresholds (CPTs) and pain threshold (PTs).
A single operator obtained measurements from maxillae at the incisor foramen and the left side of the greater palatine foramen region and the mandible at the left side of the mental foramen region, using the Neurometer CPT/C device, CPT and PT values from the oral mucosa of 20 edentulous individuals wearing complete dentures were analyzed. Participant characteristics such as mucosal thickness, occlusal force, age, and sex. Mucosal thickness over target regions and occlusal force were measured by the same operator using Krupp SDM and Occlusal Force-Meter GM10s devices. Differences in CPT and PT among the three measurement regions were tested with an analysis of covariance, and post hoc t-tests with the Bonferroni correction.
There were no significant differences between the mental foramen, incisor papilla, and greater palatine regions CPT values. PTs obtained at all current frequencies (2000Hz, 250Hz, and 5Hz) were lowest in the mental foramen region and highest in the greater palatine region. Covariates including sex, mucosal thickness, and occlusal force had no significant influence on CPT or PT values at all frequencies.
The mandible exhibits higher receptivity to external pain stimuli than the maxilla.
本研究旨在通过比较区域电流感知阈值（CPT）和疼痛阈值（PT），来探讨全口义齿患者的下颌是否比上颌对外界刺激更敏感。
一位操作人员使用 Neurometer CPT/C 设备，分别测量了上颌切牙孔和左腭大孔区域以及下颌左侧颏孔区域的黏膜，共纳入 20 名佩戴全口义齿的无牙颌患者。分析了患者的特征，如黏膜厚度、咬合力量、年龄和性别。使用 Krupp SDM 和 Occlusal Force-Meter GM10s 设备，由同一位操作人员测量了目标区域的黏膜厚度和咬合力量。采用协方差分析检验了三个测量区域之间的 CPT 和 PT 的差异，并用 Bonferroni 校正进行了事后 t 检验。
颏孔、切牙乳头和腭大孔区域的 CPT 值之间没有显著差异。在所有电流频率（2000Hz、250Hz 和 5Hz）下，PT 值在颏孔区域最低，在腭大孔区域最高。包括性别、黏膜厚度和咬合力量在内的协变量对所有频率的 CPT 或 PT 值均无显著影响。
下颌对外界疼痛刺激的敏感性高于上颌。
