The effect of light-cured resin with a glass fiber net as an intermediate material for HardSpace mouthguard
| Autor: | Tomotaka Takeda, Kazunori Nakajima, Kenichi Fukuda, Maho Saitou, Yoshiaki Matsuda, Katsushi Katano, Anna Kanemitsu |
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| Rok vydání: | 2019 |
| Předmět: |
Tooth injury
Materials science business.product_category Polyvinyl acetate Glass fiber 030229 sport sciences 030206 dentistry Equipment Design 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine stomatognathic system chemistry Hardness Athletic Injuries Materials Testing Polyethylene terephthalate Humans Mouth Protectors Mouthguard Glass Stress Mechanical Oral Surgery Composite material business |
| Zdroj: | Dental traumatology : official publication of International Association for Dental TraumatologyREFERENCES. 36(6) |
| ISSN: | 1600-9657 |
| Popis: | Despite the use of conventional mouthguards, preventable sports-related dental injuries continue to occur. The authors have developed a two-layered ethylene polyvinyl acetate (EVA) mouthguard with a hard polyethylene terephthalate (PET) insert and a buffer space (HSMG). However, adapting the PET onto the EVA layer requires skill. A light-cured Splint Resin (SRLC) and a glass fiber net (NET) reinforcement appear to resolve this issue. The aim of this study was to investigate whether SRLC with NET could replace PET and find a more practical application for NET.A pendulum impact testing machine and a dental model with strain gages were used. Six types of mouthguards were made: one with two laminated EVA blanks (LAM-MG), a three-layer type with a PET insert and an intermediate space (PET-HSMG), a HSMG with SRLC insert (LC-HSMG), and three other types with differential NET-SRLC reinforcement; NET on the outer surface of SRLC, NET on the inner surface of SRLC, and NET on both the outer and inner surfaces. Five mouthguards of each type were fabricated and tested ten times with impact distances of 15 and 30 cm. Forty more impacts were applied to all HSMGs to confirm the durability of the hard inner layer.All HSMGs showed significant strain reduction compared to the LAM-MG. PET-HSMG and the four types of LC-HSMG exhibited an equally slight strain (approximately 95% shock absorbing ability) in all conditions. During the test against the smaller impact, all HSMGs showed no cracks. When tested against the stronger impact, only the LC-HSMG with the reinforced inner surface, the double NET-reinforced LC-HSMG, and the PET-HSMG remained intact.The NET-reinforced SRLC can replace PET as an intermediate mouthguard material. The NET application, at least on the internal surface, is indispensable for the LC-HSMG reinforcement. |
| Databáze: | OpenAIRE |
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