A custom night guard is made from a record of your own teeth—not from a generic size or a mouthpiece you soften and shape at home. That record can be a physical dental impression or, for some customers, a compatible digital dental scan.
The result is a removable appliance fabricated around the shape of a specific dental arch. Its primary role is to create a protective surface between the upper and lower teeth during grinding or clenching. It does not necessarily stop the underlying habit itself.
If you are looking for the broader guide to materials, cost, fit, care, and choosing a guard, see our Complete Guide to Custom Night Guards.
What does “custom” mean for a night guard?
“Custom” refers to the way the appliance is made. Instead of starting with a universal mouth shape, a dental laboratory works from a detailed record of an individual person’s teeth.
That record captures features that a stock or boil-and-bite guard cannot reliably account for, including the shape of the teeth, the width and form of the dental arch, and the contours that help an appliance stay seated during normal wear.
A custom guard is then formed, trimmed, finished, and inspected for that specific record. Custom fit does not mean every person needs the same material, thickness, or design. Those choices depend on the wearer’s needs, dental history, comfort preferences, and the type of grinding or clenching involved.
Two ways to create the custom fit
1. A physical dental impression
A physical impression is a detailed mold of the teeth. With Sentinel, customers who do not already have a usable digital scan receive an at-home impression kit. Once the impression reaches our laboratory, it is reviewed for sufficient detail, coverage, and distortion before fabrication begins.
The accuracy of the dental record matters. If an impression does not clearly capture the teeth and surrounding contours, it may not be appropriate to manufacture from it. In that case, a new impression may be needed before a guard is made.
See how the at-home impression process works →
2. A compatible digital dental scan
Some people already have a recent digital scan from their dental office. Sentinel can accept compatible STL or PLY files, which allow our technicians to work from a digital model instead of a new physical impression.
A scan still needs to be reviewed before production. It must represent the correct arch and contain enough usable detail for the appliance being made. A photo, panoramic X-ray, or screenshot of teeth is not a substitute for a dental scan file.
For people who already have an eligible scan, this can be the fastest route to a custom-made guard because there is no impression kit to complete or return.
How a custom night guard is made in a dental laboratory
Custom fabrication involves more than heating a piece of plastic and placing it over a model. At Sentinel, each guard begins with the customer’s physical impression or digital dental model and moves through a hands-on laboratory process.
- The dental record is reviewed. We confirm that the impression or scan is usable for fabrication.
- A working model is prepared. For digital cases, we create a physical working model from the scan.
- The selected material is thermoformed. The guard material is formed over the dental model.
- The appliance is trimmed and shaped. The edges and coverage are refined for the intended design.
- The guard is finished and inspected. It is smoothed, polished, checked, and prepared for shipment.
Sentinel uses 3D printing to create accurate working models for eligible digital cases. The finished night guard itself is not 3D printed in resin; it is thermoformed over the model, then hand-trimmed and polished in our laboratory.
See the full custom night guard fabrication process →
Custom night guard vs. boil-and-bite guard
Both kinds of guard place material between the teeth, but they are made very differently.
| Custom night guard | Boil-and-bite guard |
|---|---|
| Made from an impression or compatible digital scan of your teeth | Softened in hot water and shaped at home |
| Fabricated and finished in a dental laboratory | Made from a preformed, mass-produced shape |
| Designed to follow the wearer’s individual dental anatomy | Fit depends on home molding and the original stock shape |
| Available in different materials and constructions | Usually limited to the material and thickness supplied |
A custom guard is not automatically the answer to every dental concern. People with significant tooth pain, a loose or cracked tooth, untreated dental disease, a sudden bite change, recent dental work, or complex restorative needs should speak with their dentist before ordering a standard protective appliance.
Why custom fit matters
A well-fitting guard should stay seated during normal wear without requiring you to clench to hold it in place. It should not cause sharp pain, excessive pressure on individual teeth, injured gum tissue, or a persistent change in the way your teeth meet after removal.
Fit is only one part of the equation. Material, thickness, edge design, dental changes, and the wearer’s grinding or clenching pattern also affect how an appliance feels and how long it lasts.
If a guard becomes painful, will not seat fully, or suddenly fits differently after it once fit well, do not force it into place. The appliance—or the tooth itself—may need to be evaluated.
Read our guide to night guard pain, pressure, and fit concerns →
What a custom night guard can—and cannot—do
A night guard creates a protective barrier between opposing teeth. This can help limit direct tooth-on-tooth contact associated with grinding and clenching.
It is not a diagnosis, a cure for bruxism, or a replacement for individualized dental care. Grinding and clenching can have multiple contributing factors, and persistent jaw pain, locking, swelling, severe tooth pain, or symptoms of a sleep disorder deserve professional evaluation.
Learn how a dental night guard works →
Frequently asked questions
Can a custom night guard be made from a digital scan?
Yes. Sentinel accepts compatible STL or PLY dental scan files after review. The file must contain the information needed to create a usable dental model for the selected appliance.
Is a custom night guard the same as a sports mouthguard?
No. A sports mouthguard is designed primarily to help absorb sudden impact during athletic activity. A dental night guard is designed for repeated contact associated with nighttime grinding or clenching.
Does a custom night guard stop teeth grinding?
Not necessarily. A person may continue to grind or clench while wearing a guard. The guard’s primary purpose is to separate the teeth and receive the direct contact instead of allowing repeated tooth-on-tooth friction.
Can I order a custom night guard without seeing a dentist?
People who have already been evaluated and know they need a standard protective night guard may choose a direct-laboratory option. Sentinel does not diagnose dental conditions or replace a dental examination. If you are unsure why your teeth or jaw hurt, have unstable dental work, or have a complex treatment need, speak with your dentist first.
Start with a custom-made option
Sentinel fabricates custom Comfort, Hybrid, Hard, and Durability Night Guards in our St. Petersburg laboratory using an acceptable impression or compatible digital dental scan. Explore the available materials and choose the level of comfort and durability that fits your needs.
Explore Sentinel Custom Night Guards →
Sources
This article provides general educational information and is not a substitute for individualized dental or medical advice.