Studies on the Masticatory Efficiency

Through Masticatory Efficiency Measuring Device by Means of Sedimentation Method

Abstract

The author, applying the sedimentation method generally used in physics and applied chemistry to the prosthetic field, has taken measurements of the particle-size distribution of masticated particles, and for the purpose of finding criterion for rating the mastication efficiency, has carried out a preliminary experiment, using watersoaked, uncooked rice as material and the single sedimentation tube method, on the effect of the length of the sedimentation tube and inner tube diameter. Then on the basis of the preliminary experiment, the author contrived a double sedimentation tube method and built a particlesize distribution measuring unit. This equipment was used to test the particle separation, sedimentation time of sifted particles, the effect of separation and the quantity of saliva, particle retrieval time and mastication.