Identification and adjustment of experimental occlusal interference using functional magnetic resonance imaging.

Background: The purpose of this study was to use functional magnetic resonance imaging (fMRI) to quantify changes in brain activity during experimental occlusal interference.

Methods: Fourteen healthy volunteers performed a rhythmical tapping occlusion task with experimental occlusal interference of the right molar tooth at 0 mm (no occlusion), 0.5 mm, and 0.

Amounts of Sr and Ca eluted from deciduous enamel to artificial saliva related to dental caries.

This study was performed to elucidate the relationship between dental caries and the levels of Sr and Ca eluted from enamel, and to examine whether these elements are useful as factors to assess caries risk. The available 103 (Sr) and 108 (Ca) samples were obtained among 111 collected deciduous teeth. The healthy regions of enamel were decalcified in artificial saliva at pH 6.

Effects of pH on nitrite-induced formation of reactive nitrogen oxide species and their scavenging by phenolic antioxidants in human oral cavity.

Nitrite-induced transformation of 3-amino-4-monomethylamino-2',7'-difluorofluorecein (DAF-FM) to the triazol form (DAF-FMT) was studied using bacterial fraction of mixed whole saliva. The transformation at pH 7 was inhibited by SCN(-), suggesting that nitrosative stresses were small in the oral cavity at the pH value as SCN(-) was a normal component of saliva. DAF-FMT formation was much faster at pH 5.