title: Combined analysis of shock absorption capability and force dispersion effect of mouthguard materials with different impact objects.
abstract: The aims of the present study were to investigate the shock absorption capability and force dispersion effect of mouthguard (MG) materials using load cell and film sensors. Two kinds of MG materials, ethylene vinyl acetate and polyolefin, were chosen for this study. When impact forces of approximately 5,000 N were applied on the MG materials using a round flat-nosed rod and a bluntly pointed rod, peak intensities were measured using the load cell sensor while peak stresses and impressed stress distribution areas were measured using the film sensor. Combined analysis using both load cell and film sensors clearly showed the shock absorption properties and force dispersion effects of different MG materials with different impact object shapes. Therefore, impact analysis involving a combined use of these sensor systems was useful and reliable in assessing the shock absorption capability and force dispersion effect of MG materials.
authors.affiliation: Department of Sports Medicine/Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University.
authors.forename: Ruman Uddin
authors.initials: RU
authors.lastname: Chowdhury
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Churei
authors.forename: Hidekazu
authors.initials: H
authors.lastname: Takahashi
authors.forename: Takahiro
authors.initials: T
authors.lastname: Wada
authors.forename: Motohiro
authors.initials: M
authors.lastname: Uo
authors.forename: Shintaro
authors.initials: S
authors.lastname: Fukasawa
authors.forename: Keisuke
authors.initials: K
authors.lastname: Abe
authors.forename: Sharika
authors.initials: S
authors.lastname: Shahrin
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Ueno
mesh_terms: D008422:Materials Testing; D009064:Mouth Protectors