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Appropriate fabrication method for vacuum-formed mouthguards using polyolefin sheets.

Fumi Mizuhashi¹, Kaoru Koide¹

¹Department of Removable Prosthodontics, The Nippon Dental University School of Life Dentistry at Niigata, Niigata, Japan.

Dental Traumatology : Official Publication of International Association for Dental Traumatology

|January 21, 2020

Summary

The optimal heating temperature for vacuum-forming polyolefin mouthguards is 105°C. This temperature ensures consistent thickness and a proper fit, unlike lower or higher temperatures which result in suboptimal outcomes.

Keywords:

fabrication mouthguard polyolefin sheet vacuum-forming

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Area of Science:

Biomaterials Science
Dental Materials Science
Polymer Engineering

Background:

Polyolefin sheets are commonly used for vacuum-formed mouthguards.
Optimal heating conditions for polyolefin sheets during mouthguard fabrication are not well-established.
Current fabrication methods often mirror those used for ethylene vinyl acetate sheets, potentially leading to suboptimal results.

Purpose of the Study:

To determine the appropriate heating conditions for polyolefin sheets during vacuum-formed mouthguard fabrication.
To evaluate the impact of different heating temperatures on mouthguard thickness and fit.
To identify the optimal temperature for producing high-quality polyolefin mouthguards.

Main Methods:

Vacuum forming of 3.0 mm polyolefin mouthguard sheets on working models.
Utilizing three distinct heating temperatures: 90°C, 105°C, and 120°C.
Measuring mouthguard thickness at specific anatomical landmarks (central incisor, first molar) and assessing fit by quantifying the gap between the mouthguard and the working model.

Main Results:

Mouthguard thickness significantly varied across measured regions and heating temperatures (P < .01).
The thinnest mouthguards were observed at the labial surface of the central incisor (90°C) and the first molar surfaces (120°C) (P < .01).
The poorest mouthguard fit was achieved at a heating temperature of 90°C (P < .01).

Conclusions:

A heating temperature of 105°C is recommended for fabricating polyolefin mouthguards.
This temperature effectively balances the need for consistent mouthguard thickness.
Utilizing 105°C ensures an accurate and proper fit of the vacuum-formed mouthguards.