Effect of ethylene vinyl acetate (EVA) closed cell foam on transmitted forces in mouthguard material.
نویسندگان
چکیده
OBJECTIVES To compare transmitted forces through ethylene vinyl acetate (EVA) mouthguard material and the same EVA material with gas inclusions in the form of a closed cell foam. METHOD EVA mouthguard materials with and without foam gas inclusions and 4 mm thick were impacted with a constant force from an impact pendulum. Various porosity levels in the foam materials were produced by 1%, 5%, and 10% by weight foaming agent. The forces transmitted through the EVA after energy absorption by the test materials were measured with a force sensor and compared. RESULTS Only minor non-significant differences in transmitted forces through the EVA with and without foam were shown. CONCLUSIONS The inclusion of gas in the form of a closed cell foam in 4 mm thick EVA mouthguard materials did not improve the impact performance of the EVA mouthguard material.
منابع مشابه
Beneficial effects of air inclusions on the performance of ethylene vinyl acetate (EVA) mouthguard material.
OBJECTIVE To investigate the impact characteristics of an ethylene vinyl acetate (EVA) mouthguard material with regulated air inclusions, which included various air cell volumes and wall thickness between air cells. In particular, the aim was to identify the magnitude and direction of forces within the impacts. METHOD EVA mouthguard material, 4 mm thick and with and without air inclusions, wa...
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ورودعنوان ژورنال:
- British journal of sports medicine
دوره 36 3 شماره
صفحات -
تاریخ انتشار 2002