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- W2020183408 abstract "Mouthguards (MG) should be tested and function well at their theoretical end-use intra-oral temperature (approx 37°C). However, the influences of breathing and ambient environment make it unlikely that MGs could maintain this constant temperature. Therefore, a MG materials need to perform consistently over a wide range of possible temperatures (-20 to 40°C). PURPOSE: To characterize commercialized MG materials' properties and investigate the effect of temperature on these properties. METHODS: Five commercial thermoplastic MG materials (ER, EF, PR, PL, PS) were tested. The durometer hardness, water absorption, tear strength, and impact attenuation of the MG materials were measured according to ASTM D2240-05, D570-98 (2005), D624-00, and ASTM D6110-06f (modified) guidelines. Tests were conducted on 5 separate specimens at both room 23 ± 2°C and intra-oral 37 ± 2°C temperatures. Data was entered into the Statistical Package for Social Sciences (SPSS v. 15.0, SPSS Inc., Chicago, Ill.). Independent t-tests (Type I error = 0.05) were implemented to test for differences between room and intra-oral temperatures. RESULTS: Material hardness between room and intra-oral temperatures was significantly different for the ER (t(8) = 20.87, p<.05), EF (t(8) = 19.61, p<.05), PR (t(8) = 15.18, p<.05), PL (t(8) = 16.44, p<.05), and PS (t(8) = 17.71, p<.05) materials. Water absorption between room and intra-oral temperatures was significantly different for the ER (t(4) = -7.23, p<.05), EF (t(4) = -25.325, p<.05), PR (t(4) = -3.11, p<.05), PL (t(4) = -5.95, p<.05), and PS (t(4) = - 88.22, p<.05) materials. Tear strength between room and intra-oral temperatures was significantly different for the ER (t(6) = 14.14, p<.05), EF (t(6) = 18.91, p<.05), PR (t(6) = 5.34, p<.05), PL (t(6) = 6.15, p<.05), and PS (t(6) = 14.26, p<.05) materials. Impact attenuation between room and intra-oral temperatures was significantly different for the EF (t(4) = 7.92, p<.05), PL (t(4) = 3.62, p<.05), and PS (t(4) = -11.15, p<.05). However, there was no difference between temperatures for the ER (p =.058) or PR (p =.275) materials. CONCLUSIONS: Temperature negatively affects the physical and mechanical properties of MG materials. It is particularly noteworthy that none of the commercialized products met current ANSI and SAI standards for impact attenuation." @default.
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- W2020183408 date "2009-05-01" @default.
- W2020183408 modified "2023-09-26" @default.
- W2020183408 title "Physical And Mechanical Properties Of Commercialized Mouthguard Materials Across A Range Of Temperatures" @default.
- W2020183408 doi "https://doi.org/10.1249/01.mss.0000354750.71820.54" @default.
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