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Shock absorption capacities of mouthguards in different types and thicknesses.

Abstract
Although sports mouthguards provide protection against trauma, dentoalveolar injuries can still occur with the mouthguards in place. This study examined the effect of mouthguard protection in an in vitro model. A simulated maxilla, out of a polymethylmethacrylate (PMMA) arch, containing replaceable resin teeth, was used to assess the performance of different mouthguard designs. "Boil and bite" and custom-fitted mouthguards (ethylene vinyl acetate [EVA]) laminated with hard (poly-vinyl chloride [PVC]) or soft labial intermediate EVA layers were fabricated according to manufacturers' instructions. A steel ram was dropped onto the mouthguards at the maxillary incisor region. Changes in voltage, which were induced by a strain gauge at the back of the upper left incisor, were measured with an amplified voltmeter. Data were analysed by ANOVA at a significance level of 0.05. "Boil and bite" and mouthguards layered with silicone or with small hard PVC inserts of 1.5 mm thickness demonstrated less absorption and differed significantly from the other mouthguard systems (p < 0.05). Bilaminated mouthguards with hard PVC inserts of 0.8 mm, 1.5 mm or 2 mm thickness showed no significant differences to those with 1.5 mm thick (EVA) inserts. The absorption rates amounted to 33 % compared with the unprotected tooth.
AuthorsP Bemelmanns, P Pfeiffer
JournalInternational journal of sports medicine (Int J Sports Med) Vol. 22 Issue 2 Pg. 149-53 (Feb 2001) ISSN: 0172-4622 [Print] Germany
PMID11281619 (Publication Type: Journal Article)
Chemical References
  • Polyvinyl Chloride
Topics
  • Absorption
  • Athletic Injuries (prevention & control)
  • Equipment Design
  • Equipment Failure
  • Humans
  • Materials Testing
  • Mouth (injuries)
  • Mouth Protectors
  • Polyvinyl Chloride
  • Stress, Mechanical

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