Note (General)Occlusal interference may influence the functional balance of the autonomic nervous system. Salivary amylase levels are related to plasma noradrenaline concentrations and are increasingly being used as a marker for the reaction of the sympathetic nervous system to stress. We examined the effect of occlusal interference on salivary amylase activity (SAA). Saliva samples were obtained from10 healthy volunteers (9 males and 1 female, who had an average age of 29 years). They all had normal occlusion and no history or signs of medical disorders. Each subject was instructed to tap his teeth with and without the experimental occlusal inference of metal foil on the occlusal surface of the mandibular first molar on the habitual masticatory side. We assayed SAA ten times each for metal foil thicknesses of 12.7, 25.4, 38.1 and 50.8 µm. There was an immediate and significant increase in the SAA with all foil thicknesses compared with the control. Furthermore, the SAA returned to the control level after removal of the foil.There results suggest that SAA is a useful indicator of occlusal balance because it sensitively reacts to differences in the thickness of the metal foil. The measurement method of occlusal contact using BiteEye has high reproducibility and reliability. In this study, both occlusal contact area and the number of occlusal contact points were calculated using the BiteEye, and the occlusal contact area per point on the experimental teeth and both adjacent teeth was calculated. We found that it was possible to objectively evalvate the occlusal state by measuring SAA with tapping.
2016年度
Collection (particular)国立国会図書館デジタルコレクション > デジタル化資料 > 博士論文
Date Accepted (W3CDTF)2022-02-06T04:33:19+09:00
Data Provider (Database)国立国会図書館 : 国立国会図書館デジタルコレクション