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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.
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.
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.
