Amemiya K, Hisano M, Ishida T, Soma K
First Department of Orthodontics, Faculty of Dentistry, Tokyo Medical and Dental University, Tokyo, Japan.
J Oral Rehabil. 2002 Mar;29(3):245-56. doi: 10.1046/j.1365-2842.2002.00910.x.
The purpose of the present study was to clarify the relationship between the flow of a bolus and occlusal condition during mastication. First, the characteristics of a bolus under mastication was measured in subjects having different occlusal conditions. Secondly, the flow of a bolus between the upper and lower first molars under mastication was simulated using finite element non-linear dynamic analysis. Measurement of the elasticity of the bolus clarified the phenomenon of its communition. The measurement of the viscosity of the bolus clarified the phenomenon of its mixing with saliva. In addition, a relationship between the elasticity and the viscosity of the bolus at the point of just before swallowing was investigated. The flow of the bolus under mastication was revealed to vary according to the occlusal condition. These results suggest a close relationship between the occlusal condition, the flow of the bolus and its characteristics.
本研究的目的是阐明咀嚼过程中食团流动与咬合状况之间的关系。首先，在具有不同咬合状况的受试者中测量咀嚼时食团的特征。其次，使用有限元非线性动态分析模拟咀嚼时上下第一磨牙之间食团的流动。对食团弹性的测量阐明了其粉碎现象。对食团粘度的测量阐明了其与唾液混合的现象。此外，还研究了吞咽前瞬间食团弹性与粘度之间的关系。结果表明，咀嚼时食团的流动因咬合状况而异。这些结果表明咬合状况、食团流动及其特征之间存在密切关系。
