Sentinel Mouthguards vs. JS Dental Lab: An Honest Comparison

If you're shopping for a custom night guard online, you've likely come across both Sentinel Mouthguards and JS Dental Lab. Both companies offer professionally made custom night guards designed to help protect your teeth from grinding (bruxism) and clenching, often at a lower cost than a dentist-provided appliance.

At first glance, the two companies appear similar. Both offer multiple guard styles, use custom impressions to create each appliance, and manufacture their products in the United States. However, there are meaningful differences in their ordering process, product lineup, warranties, and customer experience.

In this comparison, we'll take an objective look at both companies to help you decide which option best fits your needs.

Editor's Note: This comparison is based on publicly available information available at the time of writing and is intended to help consumers make informed decisions. Because pricing, warranties, and policies may change over time, we recommend reviewing each company's website for the most current information. Sentinel Mouthguards also purchased and evaluated a Pro Teeth Guard night guard as part of our ongoing research into online custom night guard providers. While we have not purchased a JS Dental Lab night guard, we reviewed its publicly available product information, policies, and customer resources to prepare this comparison.

Quick Comparison

Feature	Sentinel Mouthguards	JS Dental Lab
Manufacturing	Handmade in Florida	U.S. Dental Laboratory
Standard Turnaround Time	3–5 business days	5–10 business days
Digital Scan Upload	✅ Yes (.STL files accepted)	Not publicly advertised
Impression Kit Included	✅ Yes	✅ Yes
Multiple Guard Types	✅ Yes	✅ Yes
Satisfaction Guarantee	✅ 100-Day Satisfaction Guarantee	Warranty and optional protection plan
HSA/FSA Eligible	✅ Yes	✅ Yes
Custom Fabrication	✅ Yes	✅ Yes

About Sentinel Mouthguards

Founded in 2012, Sentinel Mouthguards is a Florida-based dental laboratory specializing in custom-made night guards, sports mouthguards, retainers, and other oral appliances. Every night guard is handcrafted in St. Petersburg, Florida using professional-grade materials and made from a custom impression or compatible digital dental scan.

Unlike many online providers that rely exclusively on at-home impression kits, Sentinel also accepts existing digital intraoral scans, allowing eligible customers to skip the impression process entirely. The company offers multiple night guard options designed for light, moderate, and heavy teeth grinding and clenching, along with a 100-Day Satisfaction Guarantee and product-specific warranties.

In addition to manufacturing custom oral appliances, Sentinel publishes educational resources and medically reviewed articles to help consumers better understand bruxism, TMJ disorders, and night guard treatment options.

About JS Dental Lab

JS Dental Lab has been manufacturing dental appliances for more than 20 years and sells custom night guards directly to consumers. Their website emphasizes dentist-quality materials, professional fabrication, and lower pricing than traditional dental offices.

Customers can choose from several guard styles based on the severity of their teeth grinding and clenching, including soft, hard, hybrid, and daytime options.

Product Selection

This is one area where both companies perform well.

Sentinel currently offers:

JS Dental Lab offers:

Soft Night Guard
Hard Night Guard
Hybrid Night Guard
Premium 3D Guard
Daytime Guard

Both companies offer multiple material options designed for different grinding habits. If you're unsure which type is right for you, our guide to soft vs. hard night guard materials explains the differences between EVA, copolyester, and hybrid designs, along with which material is typically recommended for light, moderate, and heavy grinders.

Turnaround Times

If you need your custom night guard quickly, turnaround time may be an important factor when choosing between providers.

Sentinel Mouthguards typically handcrafts and ships custom night guards within 3–5 business days after receiving acceptable impressions or a compatible digital scan. Customers who need their guard even sooner also have the option to purchase expedited production.

According to JS Dental Lab's published information, customers can generally expect to receive their finished night guard in approximately 5–10 business days after the company receives their completed impressions. Actual delivery times may vary depending on shipping and production schedules.

While both companies manufacture custom appliances rather than stocking pre-made guards, Sentinel's shorter standard production timeline may appeal to customers who want to begin treatment sooner or need to replace a worn or damaged night guard as quickly as possible.

Digital Scans vs. Traditional Impressions

This is one of the biggest differences between the two companies.

Sentinel allows customers to upload existing digital dental scans (such as STL files) directly from their dentist. If you already have an intraoral scan, you can skip the impression kit entirely and have your night guard fabricated from your digital model.

At the time of writing, JS Dental Lab's standard ordering process centers around its at-home impression kit. We were unable to find publicly available information describing an option for customers to upload existing digital dental scans instead of taking new impressions.

For customers who already have a recent digital scan, this can save both time and the inconvenience of making a new impression.

Manufacturing

Both companies manufacture custom appliances in the United States.

Sentinel fabricates every night guard in its own laboratory in St. Petersburg, Florida.

JS Dental Lab also manufactures its products in the United States and emphasizes its experience as a professional dental laboratory.

Pricing

Price is often one of the biggest factors when choosing a custom night guard, but it's important to look beyond the initial purchase price. The materials used, manufacturing process, warranty, turnaround time, and customer support can all affect the overall value.

At the time of writing, both Sentinel Mouthguards and JS Dental Lab offer several custom night guard options at different price points depending on the style and material selected. Because pricing and promotions may change over time, we recommend checking each company's website for the most current information.

When comparing costs, consider questions such as:

Does the price include an impression kit?
Are shipping costs included?
What warranty or satisfaction guarantee is provided?
How quickly is the guard manufactured?
Can you use an existing digital dental scan instead of taking new impressions?
What happens if your guard needs an adjustment or remake?

For many customers, the lowest advertised price isn't necessarily the best overall value. A well-fitting custom night guard that is backed by responsive customer support, clear policies, and a satisfaction guarantee can provide greater long-term value than price alone.

If you're wondering why custom night guards cost more than over-the-counter options, our guide on why custom night guards are more expensive explains the factors that influence pricing, including materials, fabrication, and customization.

Warranties and Customer Protection

Both companies stand behind their products, although their approaches differ.

Sentinel includes:

100-Day Satisfaction Guarantee
Product-specific warranties
Unlimited adjustments during the guarantee period
Material exchanges when appropriate

JS Dental Lab advertises product warranties and also offers an optional protection plan that provides additional coverage for accidental damage, adjustments, shipping, and certain qualifying situations.

Neither approach is inherently better—the right choice depends on whether you prefer an included satisfaction guarantee or optional extended protection.

Frequently Asked Questions

Is Sentinel Mouthguards less expensive than a dentist?

For many customers, yes. Both Sentinel and JS Dental Lab typically cost substantially less than a custom night guard purchased directly through a dental office.

Can I use my existing digital scan?

Sentinel accepts compatible digital dental scans, allowing eligible customers to skip the impression kit. At the time of writing, we were unable to find publicly available information indicating that JS Dental Lab offers the same option as part of its standard ordering process.

Which company is better for heavy teeth grinding?

Both companies offer hard and hybrid night guards intended for moderate to heavy grinding. The best choice depends on your individual grinding habits, comfort preferences, and your dentist's recommendations.

Do both companies manufacture in the United States?

Yes. Both companies state that they manufacture their custom night guards in the United States.

Which company has the better guarantee?

Both companies provide customer protections, but they are structured differently. Sentinel includes a 100-Day Satisfaction Guarantee, while JS Dental Lab offers product warranties and an optional protection plan.

Which Company Should You Choose?

Choose Sentinel Mouthguards if you:

Already have a digital dental scan and want to skip the impression kit.
Prefer a 100-Day Satisfaction Guarantee.
Want your guard handcrafted in our Florida laboratory.
Value extensive educational resources and medically reviewed content.
Appreciate straightforward pricing without requiring an additional protection plan.

JS Dental Lab may be a good fit if you:

Prefer ordering through a long-established dental laboratory.
Want several night guard material options.
Are comfortable making impressions at home.
Like the availability of an optional product protection plan.

If you grind or clench your teeth and also experience TMJ symptoms such as jaw pain, muscle soreness, or morning headaches, it's worth discussing your symptoms with your dentist before choosing a night guard. While custom night guards can help protect your teeth and reduce strain on the jaw, they're only one part of a comprehensive treatment plan. Learn more in our guide: Do Night Guards Really Help with TMJ?

Care and Maintenance

Regardless of which company you choose, proper care can help keep your custom night guard comfortable, hygienic, and performing as intended for years to come.

After each use, rinse your night guard with cool water and allow it to dry completely before storing it in a ventilated case. Regular cleaning your night guard helps reduce the buildup of bacteria, plaque, and odors while preserving the material. Avoid exposing your guard to hot water or direct heat, as high temperatures can cause some materials to warp.

With proper care, many custom night guards can provide years of protection, although their lifespan depends on factors such as the material, the severity of your grinding or clenching, and how consistently the guard is maintained. Learn more about how long a night guard lasts and the signs that it may be time for a replacement.

Whether you purchase from Sentinel Mouthguards or JS Dental Lab, following the manufacturer's care instructions and scheduling regular dental checkups can help ensure your night guard continues to fit properly and protect your teeth.

Our Verdict

Both Sentinel Mouthguards and JS Dental Lab offer quality custom night guards that cost significantly less than many dentist-provided appliances.

JS Dental Lab has built a strong reputation as an experienced dental laboratory and offers a wide selection of guard types. Sentinel distinguishes itself through its digital scan workflow, transparent manufacturing process, 100-Day Satisfaction Guarantee, and commitment to educating customers through medically reviewed content.

Ultimately, the best night guard is the one that fits your needs, your budget, and your preferred ordering experience.

Every comparison published by Sentinel Mouthguards follows the same evaluation process. We review publicly available information from each company's website, including product selection, pricing, manufacturing details, warranties, ordering process, customer policies, and educational resources. When possible, we also purchase and evaluate competitors' products firsthand. Our goal is to help consumers make informed decisions by presenting accurate, balanced information while acknowledging that products, pricing, and policies may change over time.

Continue Your Research

If you'd like to learn more before choosing a custom night guard, these additional resources may help: