Elucidation of the onset mechanism of occlusal dysesthesia

为探讨睡眠磨牙症(SB)和牙齿接触习惯(TCH)对牙周感觉的影响，将30名受试者分为4组，分别代表G1(SB，TCH)、G2(SB，TCH-)、G3(SB-，TCH-)和G4(SB-，TCH-)。根据第一磨牙区的咬合间触觉阈值(ITT)评估牙周感觉。各组间ITT差异无统计学意义。SB组(G1和2)的ITT显著低于非SB组(G3和G4)(p&lt；0.01)。而TCH组(G1、G3)与非TCH组(G2、G4)的ITT差异无统计学意义，提示SB影响牙周感觉，而TCH不影响牙周感觉。

The purpose of this study was to investigate the effects of Sleep Bruxism (SB) and Tooth Contacting Habit (TCH) on periodontal sensation.Thirty subjects divided into four groups representing G1 (SB+, TCH+), G2 (SB+, TCH-), G3 (SB-, TCH+) and G4 (SB-, TCH-). Periodontal sensation was assessed based on interocclusal tactile threshold (ITT) in the first molar region. The ITT was not significantly different between each group. The ITT of SB subjects (G1 and 2) were significantly lower than that of non-SB subjects (G3 and G4) (p < 0.01). On the other hand, the ITT of TCH subjects (G1 and G3) was not significantly different from that of non-TCH subjects (G2 and G4).The results of this study suggest that SB affects periodontal sensation but TCH dose not affect periodontal sensation.