新しい咬合力測定システムについて : ニュープレスケールとその測定装置について

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The purpose of this study was to develop a new method for measuring the force added to the tooth contact points in occlusion. A new system, which has a computer inside, measuring for the occlusal force recorded on pressure detecting sheets was developed. The pressure detecting sheets were originally produced by Fuji Photo Film Co. and it is called by the trade name of "Prescale". The Prescale consists of two polyethylene sheets and numerous microcapsules containing a red dye between the sheets. When the teeth are brought into occlusion, these microcapsules rupture and discharge the dye staining one of the sheets red. The density of this color is in proportion to the degree of pressure added. Original thickness of the Prescale was 200μ. But it was too thick and too hard to study the tooth contacts in occlusion. The new Prescale was improved to be 95μ thick and became available for occlusal diagnosis and treatment. The applicable pressure is from 200kg/cm^2 to 700kg/cm^2. The device consists of microscope, T.V. camera, microcomputer, light-source and printer. The density of the color recorded on the improved Prescale was divided into 8 degrees, and at the same time, the area of each grade was measured. The force was given by the area of each grade multiplied by its pressure. The force of one occlusal contact point was expressed by adding the force of each grade. Ten subjects whose oral conditions were healthy were selected. Using this system, their occlusal force at their molars were measured ten times each subjects. The maximum occlusal forces were 31.4kg (1st molar), 30.9kg (2nd molar). The mean value of the occlusal forces at 1st molar was 10.85kg, and at 2nd molar was 19.83kg.
特定非営利活動法人日本歯周病学会の論文
1981-09-28

新しい咬合力測定システムについて : ニュープレスケールとその測定装置について

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