Sentinel Mouthguards vs. Smile Brilliant
Both companies offer custom night guards without the traditional dental-office price—but they are built around very different ideas. Smile Brilliant emphasizes soft guards and low-cost bundles. Sentinel emphasizes matching the guard material and design to the wearer.
Executive Summary
Smile Brilliant may be the better value for someone who already knows they want a soft night guard. Sentinel is the more flexible choice for someone who wants soft, hard, hybrid, heavy-duty, or daytime options.
Smile Brilliant’s current night-guard lineup focuses on soft, cushioned guards in 2 mm and 3 mm thicknesses. Customers can purchase one, two, or four guards, with larger bundles substantially reducing the cost per appliance.
Sentinel takes a different approach. Rather than assuming one material works for every grinder, Sentinel offers several constructions intended for different wearing habits, comfort preferences, and levels of grinding or clenching.
That distinction matters because soft night guards are not right for everyone. Some people find cushioned material comfortable and easy to adapt to. Others subconsciously chew or clench against it and may be better served by a hard or hybrid design.
Which company is likely the better fit?
Choose Sentinel if...
- You want a choice of soft, hard, hybrid, or heavy-duty material.
- You have chewed through soft guards in the past.
- You are unsure whether cushioned material is right for you.
- You need a low-profile daytime clenching guard.
- You already have an STL or PLY dental scan.
Smile Brilliant may suit you if...
- You already know you prefer a soft guard.
- You have worn cushioned guards successfully before.
- You want several guards at a low average cost.
- You expect to replace soft guards periodically.
- You prefer a simple thickness-and-quantity selection.
Same problem. Two different product philosophies.
Both companies make custom-fitted night guards available outside the traditional dental-office purchasing process. But they begin with different assumptions about what the customer needs.
Smile Brilliant begins with soft material. Customers select a 2 mm or 3 mm cushioned guard, then choose whether to purchase one, two, or four.
Sentinel begins with the wearer. Customers can choose among soft, hard, hybrid, heavy-duty, and daytime appliances based on how they grind, how they respond to different materials, and what they have worn successfully in the past.
Neither approach is inherently wrong. Smile Brilliant’s simplicity can be appealing if you already know soft material works for you. Sentinel’s broader lineup matters when you do not.
Sentinel and Smile Brilliant compared
Both brands use a custom dental impression to create a fitted appliance. The differences appear in materials, product breadth, digital options, guarantees, and replacement strategy.
| Feature | Sentinel Mouthguards | Smile Brilliant |
|---|---|---|
| Primary approach | Choose among several materials and designs. | Choose a soft-guard thickness and package quantity. |
| Soft night guard | Yes — Comfort Guard. | Yes — 2 mm or 3 mm. |
| Hard night guard | Yes. | Not listed in the current night-guard lineup. |
| Hybrid guard | Yes — soft interior with a firmer exterior. | Not listed in the current night-guard lineup. |
| Heavy-duty hard option | Yes — 3 mm Durability Guard. | Offers a thicker 3 mm soft guard and multi-guard bundles. |
| Daytime clenching guard | Yes — No-Show Day Guard. | No dedicated daytime design listed. |
| Bundle quantities | Guards generally purchased individually. | One-, two-, and four-guard packages. |
| Digital scan upload | Accepts qualifying STL and PLY files. | Published ordering flow centers on a mailed impression kit. |
| Satisfaction period | 100-Day Satisfaction Guarantee. | 45-day money-back guarantee. |
| Reordering | Reorders available from retained records within applicable storage periods. | Digital dental models retained for one-click lifetime reorders. |
Why material choice matters more than it may seem
A custom fit is important, but it does not make every night guard function the same way. Soft, hard, and hybrid materials feel and wear differently.
Soft material bends and cushions. Hard material remains more rigid. Hybrid material combines a softer interior with a firmer outer surface. Thickness also matters, but a 3 mm soft guard is still a fundamentally different appliance from a 3 mm hard guard.
Related Buyer’s Guide Night Guard Types Explained: Which One Should You Choose? →Comfort Guard
SoftA flexible, cushioned option for people who prefer a gentler feel and have successfully worn soft appliances before.
Hard Guard
RigidA firm appliance that does not compress like soft material. It may appeal to customers who dislike cushioning or repeatedly chew through softer guards.
Hybrid Guard
Dual laminateA softer interior paired with a firmer exterior, offering a middle ground between an entirely flexible guard and a completely rigid one.
Durability Guard
3 mm hardSentinel’s thickest hard option for customers who have a history of wearing through thinner appliances.
Material and thickness are not interchangeable
A thicker soft guard provides more cushioned material to wear through. It does not become a rigid hard guard or a dual-laminate hybrid guard.
Are soft night guards right for everyone?
No single material is ideal for every grinder. Soft guards work very well for some people and poorly for others.
Many people appreciate the gentle, cushioned feeling of a soft night guard. It may be easier to adapt to and can be an appropriate choice for certain light or moderate grinding patterns.
Other people find that resilient material gives them something to subconsciously chew, compress, or clench against during sleep. Those wearers may create deep bite marks, damage the appliance quickly, or feel that the cushioning encourages more jaw activity.
This does not mean soft guards are inherently ineffective. It means the wearer’s response to the material matters.
You already know cushioning works well for you
- You have worn soft guards successfully before.
- You prefer flexibility over rigidity.
- Your grinding or clenching is relatively light.
- You do not chew through resilient material.
- Your dentist has recommended a soft appliance.
Cushioned guards become something you chew
- You repeatedly destroy soft appliances.
- You create deep bite marks quickly.
- You dislike a bulky or compressible feel.
- You want a firmer biting surface.
- Your dentist recommends a hard or hybrid design.
Smile Brilliant’s strongest advantage is bulk pricing
For someone who already knows they want a soft guard, the larger packages can reduce the cost per appliance dramatically.
| Smile Brilliant package | 2 mm soft | 3 mm soft | Approx. price per guard |
|---|---|---|---|
| One guard | $148.95 | $158.95 | $148.95–$158.95 |
| Two guards | $164.95 total | $181.95 total | $82.48–$90.98 |
| Four guards | $194.95 total | $224.95 total | $48.74–$56.24 |
Prices shown were publicly displayed during our August 2026 review and may change.
Smile Brilliant’s four-guard package is an attractive value for a customer who already knows that soft material works well and expects to replace guards periodically.
The comparison becomes less direct when the customer needs another construction. Four soft guards are not equivalent to one hard, hybrid, or dedicated daytime appliance. The lowest unit price is useful only when the product itself is appropriate for the wearer.
Price Context How Much Does a Custom Night Guard From the Dentist Cost? →Both companies bring the dental impression process home
Customers create an impression, return it to the laboratory, and receive a guard made from their individual dental anatomy.
Create the impression
The customer mixes impression material and captures the upper or lower teeth according to the kit instructions.
Return it to the lab
The impression is inspected and converted into a physical or digital model of the teeth.
Fabricate the guard
The appliance is formed, trimmed, hand-finished, inspected, and shipped to the customer.
Smile Brilliant advertises an included impression kit, prepaid three-way shipping, laser scanning, 3D-printed dental models, and a laboratory fabrication time of approximately three to six business days after the impressions arrive.
Sentinel fabricates its appliances in St. Petersburg, Florida. Customers can use the at-home impression system or upload an existing STL or PLY dental scan. The models may be digitally produced, but the guards themselves are hand-fabricated and finished by the laboratory team.
See the Process How Sentinel’s At-Home Impression Process Works → Skip the Impression Kit How to Send an STL or Digital Dental Scan →Traditional braces are not supported by Sentinel’s impression system.
Sentinel does not make night guards for customers who are currently wearing traditional braces. The at-home impression system is not designed to capture teeth fitted with brackets and wires, and impression material can flow around orthodontic components.
Customers in active orthodontic treatment should work directly with their orthodontist for any protective appliance needed while the braces remain in place.
A permanent bonded retainer is different from traditional braces. Sentinel can generally fabricate a guard over a secure permanent retainer when it is accurately captured in the impression or digital scan.
Permanent Retainer Guidance Can I Wear a Night Guard With a Permanent Retainer? →Different policies address different customer concerns
Smile Brilliant emphasizes low-cost replacement and fast reordering. Sentinel places more emphasis on fit resolution, remakes, and product-specific warranties.
100-Day Satisfaction Guarantee
Sentinel’s process allows up to three resolution attempts, which may include an adjustment, remake, or replacement impression kit. If the issue cannot be resolved, the order may qualify for a refund minus the impression-kit fee under the published policy.
Current product warranties include six months for the Comfort Guard and one year for the Hard, Hybrid, and Durability Guards.
45-day trial and lifetime reorders
Smile Brilliant advertises a 45-day money-back guarantee, easy adjustments or impression retakes, digital model storage, and one-click lifetime reorders.
The company’s general guarantee page also advertises a two-year $35 replacement for lost, damaged, or destroyed trays. Because that page covers multiple tray products, night-guard buyers should confirm that the replacement offer applies to their exact purchase.
Daily care affects how long any night guard lasts
Rinse the appliance after use, clean it with a non-abrasive method, allow it to dry fully, and store it in a ventilated case. Avoid hot water, which can distort the fit, and abrasive toothpaste, which can scratch the surface.
Care Guide How to Clean and Sterilize Your Night Guard →Which company is the better match for you?
You want the appliance type matched to your needs
- You are unsure whether soft material will work for you.
- You want a hard, hybrid, or heavy-duty guard.
- You have chewed through soft guards in the past.
- You need a daytime clenching design.
- You already have an STL or PLY dental scan.
- You value a longer fit-resolution period.
You already know you prefer a soft guard
- You want a 2 mm or 3 mm cushioned appliance.
- You have worn soft guards successfully before.
- You want several guards at a low average price.
- You expect to replace soft guards periodically.
- You value one-click lifetime reorders.
- You prefer a streamlined bundle model.
Smile Brilliant offers impressive bundle value. Sentinel offers a more individualized choice.
Smile Brilliant has created a strong offer for shoppers who already know they want a soft custom night guard. Its straightforward selection process, included impression kit, low bundle pricing, digital model storage, and reorder system are genuine strengths.
The limitation is that cushioned material is not ideal for every person. Some wearers chew or clench more against resilient material. Others need the rigidity, durability, or lower-profile feel of a different construction.
Sentinel is the stronger choice for customers who want the material and design selected around their actual grinding and clenching habits—not only around thickness and quantity.
Sentinel vs. Smile Brilliant FAQ
Is Smile Brilliant less expensive than Sentinel?
Smile Brilliant can be substantially less expensive per guard when purchasing a package of two or four soft guards. Sentinel generally sells appliances individually and offers several materials and specialized designs, so the products are not always directly equivalent.
Does Smile Brilliant offer a hard night guard?
Smile Brilliant’s publicly displayed night-guard lineup reviewed in August 2026 focuses on soft 2 mm and 3 mm guards. Its current night-guard product page does not list a conventional hard or dual-laminate option.
Are soft night guards effective for teeth grinding?
Soft guards can work well for many light to moderate grinders and people who prefer cushioning. Some people, however, subconsciously chew or clench against resilient material. A hard or hybrid guard may be a better option for those wearers.
Which company may be better for a heavy grinder?
Smile Brilliant offers a thicker 3 mm soft option and discounted multi-guard bundles. Sentinel offers hard, hybrid, and 3 mm hard guards in addition to a soft option. A heavy grinder who rapidly destroys soft material may benefit from Sentinel’s wider selection.
Do both companies provide an impression kit?
Yes. Both companies use at-home dental impressions for eligible customers. Sentinel also accepts qualifying STL and PLY digital dental files.
Can I order a Sentinel night guard while wearing traditional braces?
No. Sentinel does not make night guards for customers currently wearing traditional braces because its impression system is not designed for orthodontic brackets and wires.
Can Sentinel make a night guard over a permanent retainer?
Generally, yes, provided the bonded retainer is secure and accurately captured in the impression or digital scan. A loose or damaged retainer should be repaired first.
Which company has the better guarantee?
The policies address different priorities. Smile Brilliant advertises a 45-day money-back guarantee and lifetime reordering. Sentinel provides a 100-Day Satisfaction Guarantee with a structured adjustment and remake process, plus product-specific warranties.
Did Sentinel independently test a Smile Brilliant night guard?
No. This article compares publicly available product information, prices, and policies, along with Sentinel’s professional understanding of dental-appliance materials. It does not claim to be a hands-on Smile Brilliant product test.
Choose your next guide
Sources and fact-checking: Smile Brilliant product details, pricing, material descriptions, turnaround information, guarantee language, and reorder information were reviewed on the company’s public night-guard, FAQ, and guarantee pages in August 2026. Competitor products, prices, and policies can change without notice.
This article is educational and does not replace diagnosis or treatment by a dentist. People with persistent jaw pain, damaged teeth, significant bite changes, active orthodontic treatment, or complex dental restorations should consult a qualified dental professional.