For most people, night guards are a safe and effective way to protect teeth from grinding and clenching. But no matter who you are, it’s always important to know what your guard is made of. Some mass-produced or acrylic-based guards can contain additives that, over time, may trigger irritation, inflammation, or even allergic reactions.
At Sentinel Mouthguards, we believe your guard should only protect your smile — never compromise your health. That’s why our products are completely free from MMA, PVC, latex, phthalates, and silicone, so you can wear them with confidence night after night.
Common Problem Materials in Night Guards
MMA (Methyl Methacrylate)
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MMA is sometimes used in hard acrylic guards and dental appliances.
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In sensitive individuals, it can cause:
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🔴 Oral irritation or burning
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🔴 Redness or swelling in gums
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🔴 Allergic contact dermatitis
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Long-term exposure may increase sensitivity over time, even if mild at first.
PVC (Polyvinyl Chloride)
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PVC is a cheap plastic sometimes used in overseas-manufactured guards.
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It requires phthalates (plasticizers) to make it flexible.
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Concerns with PVC and phthalates include:
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⚠️ Potential reproductive effects
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⚠️ Increased health concerns when heated or degraded
Latex
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Latex allergies are relatively common — affecting up to 6% of the population.
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Reactions can range from mild irritation to serious swelling or difficulty breathing.
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Even if you don’t have a latex allergy, prolonged exposure can increase risk of developing one.
Signs You May Be Having a Reaction
If your night guard is made with unsafe materials, you might notice:
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Redness or irritation on gums, cheeks, or tongue
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Itching or small rashes inside the mouth or around the lips
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Burning sensations after wearing the guard
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Unusual swelling or discomfort where the guard contacts soft tissues
If you experience these symptoms, discontinue use and consult your dentist.
FAQs About Allergies & Night Guards
Can night guards cause allergic reactions?
Yes, though it’s relatively rare. Some night guards made with acrylic (MMA), PVC, latex, or phthalates can trigger irritation, redness, swelling, or rashes in sensitive individuals. Choosing a guard made from hypoallergenic, medical-grade materials minimizes this risk.
What is the safest material for a night guard if I have sensitivities?
The safest options are dental-grade EVA (ethylene vinyl acetate) or copolyester. Both are durable, comfortable, and free from common irritants such as MMA, PVC, latex, and phthalates.
Are Sentinel Mouthguards hypoallergenic?
Yes. Every Sentinel Mouthguard is made from hypoallergenic, dentall-grade materials sourced from trusted U.S. suppliers.
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✅ BPA- & BPS-free
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✅ MMA-free
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✅ PVC-free
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✅ Latex-free
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✅ Phthalate-free
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✅ Silicone-free
This ensures your guard protects your teeth without introducing new health concerns.
The Sentinel Difference: Hypoallergenic & Medical-Grade
At Sentinel, we use only dental-grade EVA and copolyester for our guards. These materials are:
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✅ BPA- & BPS-free
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✅ MMA-free
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✅ PVC-free
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✅ Latex-free
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✅ Phthalate-free
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✅ Silicone-free
Every Sentinel guard is crafted in the U.S. with FDA-registered materials sourced from Keystone Industries. That means you never have to worry about hidden fillers, overseas outsourcing, or unsafe additives.
Final Thoughts
Your night guard should protect your teeth — not introduce new risks. Unfortunately, many mass-produced or acrylic-based guards still use materials that can cause allergic reactions or long-term health concerns.
📦 Sentinel Mouthguards are designed differently: safe, hypoallergenic, and made from trusted U.S.-sourced materials.
👉 Shop our custom night guards →