アブストラクト（21巻2号：The Bulletin of Kanagawa Dental College）

The Bulletin of Kanagawa Dental College

English

Title　： A Study on Intensity of Mannequin Mouth Angle
Subtitle　： ORIGINAL ARTICLE
Authors　： Akiko Takahashi, Etsuro Matsuo, Minoru Toyoda, Yuko Kumazawa, Masahiro Ishida, Tetsuo Mizutani
Authors（kana）　：
Organization　： 1st Department of Prosthetic Dentistry, Kanagawa Dental College
Journal　： The Bulletin of Kanagawa Dental College
Volume　： 21
Number　： 2
Page　： 63-71
Year/Month　： 1993 / 9
Article　： Original article
Publisher　： Kanagawa Odontological Society
Abstract　： [Abstract] With attention focused on a breach of the mannequin mouth angled portion when we took an impression, we compared its strength with the conditions of organisms (humans) with the use of a spring measure and an impact hammer. With the spring measure fitted to one angled portion of mouth, the width between both angles of mouth was measured by calculating the expansion degree of the angled portion while it was pulled with the traction force of (1) 0g, (2) 300g and (3) 500g. In the state of traction, the angle of mouth was oscillated by an impact hammer method to measure elasticity and viscosity. The findings are as follows. 1. The width between the angles of mouth, measured in each given condition, was greater for organisms than for phantoms, and so was the angle-of-mouth contraction range. 2. As regards the measurement of elasticity and viscosity by the impact hammer method, the factors of elasticity and viscosity changed for organisms, depending on the degree to which the angled portion is pulled, but when it come to phantoms, elasticity did not change but only viscosity changed.
Practice　： Dentistry
Keywords　： Impact Hammer, Elasticity, Viscosity