Use of Polyolefin as Mouthguard Material as Compared to Ethylene Vinyl Acetate

Suzuki, Hiroshi; Harashima, Tomomi; Asano, Takashi; Komiyama, Osamu; Kuroki, Tetsuo; Kusaka, Kazuyo; Kawara, Misao

doi:10.5466/ijoms.6.14

Cited by 24 publications

(41 citation statements)

References 12 publications

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“…However, BS at FR was not significantly different regardless of the material used. Previous studies reported that BSs at FR were 12.7-14.4 N/mm 16) for PO, and 7.4 N/mm 16) and 1.46-5.4 N 17) for ethylene-vinyl acetate copolymer materials.…”

Section: Discussionmentioning

confidence: 99%

“…However, the T-shape shear test has been one of the most popular test methods and the bond strength at the fracture has been discussed 16,17) . The load-displacement curve during the delamination test showed an S-shape (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…A T-peel test was used as the delamination test 16,17) . Two sheets of the same mouthguard material in different colors were laminated together.…”

Section: Delamination Testmentioning

confidence: 99%

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Bonding durability of custom-made mouthpiece for scuba diving after water storage under pressure

et al. 2009

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The purpose of this study was to assess the behavior of laminated thermoforming materials in an underwater environment to understand the durability of mouthpieces for scuba diving. Two thermoforming materials, polyolefin (PO) and ethylene-vinyl acetate copolymer (EV), were laminated and stored in air, 37°C water, and 37°C water under 0.2-MPa pressure for 1 and 4 weeks . The load/ bonding width (bonding strength: BS) and displacement at the start of delamination (SD) and fracture (FR) were analyzed with 3-way ANOVA. BS values at SD and FR in air were significantly greater than those under the other conditions, and the BS at SD of EV was significantly greater than that of PO, though the effects of materials, duration and their interactions were not significantly different. The displacements at SD and FR were significantly influenced by the material. These results suggest that both materials can be employed for making a diving custom mouthpiece.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Bonding durability of custom-made mouthpiece for scuba diving after water storage under pressure

et al. 2009

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“…Polyolefin is a recent-emerging mouthguard material which has been popularly used during the past decades. It exhibits good shock absorption capability with lower water absorption and higher adhesive strength than EVA 9,10) . Therefore, EVA and polyolefin were two mouthguard materials selected for investigation in the present study.…”

Section: Discussionmentioning

confidence: 99%

“…Ethylene vinyl acetate (EVA) is the most commonly used material for commercial and custom mouthguards because of these attractive features: widespread availability, can be easily molded, and yet has adequate physical and mechanical properties 8) . Polyolefin is also another popular mouthguard material in terms of tensile and tear strength, hardness, contact angle to water, shock-absorbing capability 9) , and good bonding durability like EVA when stored in water under pressure 10) . In vitro studies on the shock absorption capability of mouthguards quantify the direct impact on the latter by measuring force using load cells, accelerometers, fiber Bragg grating sensors and strain gages.…”

Section: Introductionmentioning

confidence: 99%

Combined analysis of shock absorption capability and force dispersion effect of mouthguard materials with different impact objects

et al. 2014

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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.

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Useful design of custom-made mouthguard for athletes undergoing orthodontic treatment with brackets and wires

Chowdhury

Churei

Tanabe

et al. 2022

Journal of Dental Sciences

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Background/purpose Custom-made mouthguards (MGs) are strongly recommended for athletes during sports activities to prevent dental injuries. Athletes undergoing orthodontic treatment and wearing brackets require specially designed MGs for better protection and to create more space that will not hinder the planned orthodontic tooth movement. The purpose of this study was to fabricate effective, specially designed, custom-made MGs for patients or athletes with ongoing orthodontic treatment and to evaluate the shock absorption abilities of these MGs by an in vitro comparison of three different designs. Materials and methods Three different types of specially designed, double-layered MGs, (i) creating inter bracket space inside the MG, (ii) embedding silicon wax inside the MG, and (iii) creating a buffer space with additional hard insertion, were fabricated from a simulated bracket attached model. Impact test was performed using a free-falling object on a vertical rod, and the strain-gauge system was used to assess the strain on the dentition with the MGs for the comparison of the shock absorption abilities of the three types. Analysis of variance at a significance level of 5% and multiple comparisons were performed for statistical analysis. Results The strains on the dentition with the MG creating buffer space with hard insertion were significantly lower than those with the other two types of MG (P < 0.001). Conclusion Insertion of a hard material and ensuring buffer space between the MG and the teeth and/or appliance was more effective than other methods of fabricating custom-made MGs to prevent sports-related traumatic dental injuries in athletes undergoing orthodontic treatment.

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Use of Polyolefin as Mouthguard Material as Compared to Ethylene Vinyl Acetate

Cited by 24 publications

References 12 publications

Bonding durability of custom-made mouthpiece for scuba diving after water storage under pressure

Bonding durability of custom-made mouthpiece for scuba diving after water storage under pressure

Combined analysis of shock absorption capability and force dispersion effect of mouthguard materials with different impact objects

Useful design of custom-made mouthguard for athletes undergoing orthodontic treatment with brackets and wires

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