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

Yuko Watarai¹, 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

|December 13, 2021

Summary

The optimal heating temperature for fabricating polyolefin mouthguards using the pressure-formed technique is 90°C. This temperature ensures proper thickness and fit, particularly for the anterior teeth area.

Keywords:

fabrication mouthguard polyolefin sheet pressure-forming

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Area of Science:

Materials Science
Dental Biomaterials
Orthodontics

Background:

Polyolefin mouthguards are commonly fabricated using methods similar to ethylene-vinyl acetate mouthguards.
Optimal heating conditions for polyolefin sheets in pressure-forming have not been established.

Purpose of the Study:

To determine the appropriate heating temperature for polyolefin sheets during pressure-formed mouthguard fabrication.
To evaluate the impact of heating temperature on mouthguard thickness and fit.

Main Methods:

Polyolefin sheets (3.0 mm) were pressure-formed at 90°C, 105°C, and 120°C.
Mouthguard thickness was measured on incisors and molars.
Mouthguard fit was assessed by measuring the gap at the cervical margins of incisors and molars.
Two-way ANOVA was used to analyze differences in thickness and fit.

Main Results:

Mouthguard thickness varied significantly across measured regions and heating temperatures (p < .01).
The 90°C condition yielded the greatest thickness on the labial surface of central incisors.
Fit did not significantly differ between heating conditions at either the incisor or molar regions.

Conclusions:

A heating temperature of 90°C is recommended for pressure-formed polyolefin mouthguards.
This temperature optimizes mouthguard thickness in the anterior teeth region while maintaining proper fit.
Further research may explore other polyolefin formulations or fabrication parameters.