Last updated: November 10, 2026.

Medical & Product Disclaimer

This disclaimer is part of the Terms of Service of Alienguards, LLC, 25 S 3rd St, Unit 105, San Jose, CA 95113. Contact: support@alienguards.com.

No guarantee of injury or concussion prevention

AlienGuards mouthguards are not guaranteed to prevent injury, dental trauma, or concussion, or to reduce the severity of any injury. No mouthguard can protect against all harm. Sports and other physical activities have inherent risks, including serious injury, whether or not a mouthguard is worn.

A mouthguard is only one piece of equipment. It does not replace a helmet, face mask, or other required or recommended gear, rules of play, officiating, coaching, conditioning, or medical clearance to participate. It is not a medical device sold to diagnose, treat, cure, or prevent any disease or condition, and we make no such claims.

Not a substitute for professional fitting or professional care

A custom guard made from an at-home impression is not a substitute for an examination, a professionally taken impression, or a fitting by a licensed dentist or a qualified athletic trainer. Nothing on alienguards.com or in our communications is medical, dental, or athletic-training advice. We are a laboratory and retailer, not your dentist, physician, or trainer.

Talk to a dentist before ordering or using a guard if you have pain, loose or shifting teeth, gum disease, braces or other appliances, recent or planned dental work, jaw pain, or an allergy to plastics or impression materials. An at-home impression does not include X-rays or a clinical exam.

Fit, inspection, and replacement

Fit depends on the quality of your impressions and on changes in your mouth. Inspect the guard before every use. Do not use it if it is cracked, torn, warped, loose, or worn through, or if it no longer fits. Do not chew it. Replace it when it is worn or damaged, and about once a year or sooner for a growing athlete, or as a dentist or trainer advises. See the Impression Kit Instructions & Safety and the Refund & Remake Policy.

Stop use and get care if you have problems

Stop using the guard and contact a dentist and us if you have pain, sores, swelling, bleeding that is not minor, looseness of teeth, a change in your bite, or signs of an allergic reaction. For trouble breathing, swelling of the face or throat, or a suspected concussion or other sports emergency, seek emergency medical care immediately. We are not an emergency service. A mouthguard does not treat or rule out a concussion.