Updated September 2026
“Occlusal guard,” “night guard,” “bite guard,” and “occlusal splint” are often used as though they mean exactly the same thing. Sometimes they do. Often, they do not.
The key difference is not simply the material or whether an appliance is worn on the upper or lower teeth. It is what the appliance is designed to do—and whether it is part of a dentist-directed treatment plan.
This guide explains the terminology, when a custom night guard may be appropriate for protecting teeth from clenching or grinding, and when symptoms call for a dentist’s evaluation instead.
Quick answer: what is the difference?
An occlusal guard is a removable appliance worn over the teeth to create a barrier between the upper and lower biting surfaces. It is often called a night guard when used during sleep by someone who clenches or grinds their teeth.
An occlusal splint is a broader clinical term. A dentist may use it to describe a protective guard, but it can also refer to a more specifically designed appliance prescribed and monitored for a particular bite, jaw-joint, or dental concern.
In plain language: A custom night guard is intended to help protect teeth from direct tooth-on-tooth contact. A therapeutic splint is a dentist-directed appliance that may be part of a clinical treatment plan.
What is an occlusal guard?
“Occlusal” refers to the surfaces of your upper and lower teeth that meet when you bite. An occlusal guard covers one arch of teeth and helps separate those surfaces during clenching or grinding.
For many people, the goal is straightforward: to place a durable layer between the teeth so the guard receives the contact instead of enamel, fillings, crowns, veneers, or other dental work.
A custom guard is made from an impression or digital scan of your own teeth. That precise fit helps it stay secure and feel more natural than a generic, one-size-fits-most option. For a fuller explanation of how these appliances are made and what makes them custom, read our complete guide to custom night guards.
What is an occlusal splint?
An occlusal splint may look similar to a night guard, especially if it is clear and made from a firm material. But the term can describe an appliance with a more specific clinical purpose.
A dentist may prescribe and monitor a splint when they are evaluating a complex bite relationship, managing certain jaw-joint or muscle symptoms, protecting teeth during a particular course of treatment, or tracking how a patient responds over time.
That is why you should not assume every appliance described online as a “splint” is interchangeable with a standard protective guard. The name alone does not tell you the appliance’s purpose.
Are night guards and splints ever the same thing?
Yes—sometimes a dentist may use “night guard,” “bite splint,” or “occlusal splint” to describe a simple protective appliance for grinding. In other situations, the distinction is important.
The better question is: Was this appliance designed simply to protect my teeth, or was it prescribed to manage a specific clinical concern?
- If the goal is everyday protection from routine clenching or grinding, a custom night guard may be appropriate.
- If the goal involves changing or managing the bite, addressing substantial jaw symptoms, or supporting a diagnosis, speak with a dentist before choosing an appliance.
Temporomandibular disorders can involve jaw pain, stiffness, locking, clicking, and trouble with jaw movement. They have multiple possible causes, which is why a personalized evaluation matters when symptoms are new, significant, or persistent. The National Institute of Dental and Craniofacial Research offers a helpful overview of TMD symptoms and treatment considerations.
When a custom night guard may be a good fit
A custom night guard can be a practical option for adults seeking a well-fitting protective appliance for common clenching or grinding concerns—provided they are not already following a dentist-directed splint plan.
You may want to discuss a night guard with your dentist or explore a custom option if you notice:
- Flattened, worn, chipped, or cracked tooth edges
- Morning jaw-muscle soreness or a habit of waking with your teeth clenched
- Grinding that a partner can hear during sleep
- Dental work that your dentist has recommended protecting from grinding forces
- An over-the-counter guard that feels bulky, loose, or difficult to wear consistently
A guard does not diagnose the cause of clenching or grinding, and it does not necessarily stop the habit itself. Its role is to help protect the teeth from the direct contact that can occur while the habit is happening.
When to see a dentist before ordering a guard
Do not rely on a night guard alone for new, severe, or changing symptoms. Make an appointment with a dentist if you have:
- Jaw locking or trouble opening and closing your mouth
- A sudden change in how your teeth meet
- Significant tooth pain, a loose tooth, swelling, or a suspected fracture
- Persistent jaw or facial pain that is worsening
- A dentist-prescribed splint or another ongoing dental treatment plan
You should also check with your dentist first if you have active dental concerns that could affect fit, including untreated cavities or gum disease, recent extensive dental work, orthodontic treatment, or a changing bite.
Important: Sentinel custom night guards are protective dental appliances. They are not intended to diagnose, treat, cure, or correct TMJ/TMD, malocclusion, sleep disorders, or other medical or dental conditions.
Choosing a protective guard for clenching or grinding
Once you know that a protective custom night guard—not a dentist-directed therapeutic splint—is the appropriate category, material and thickness become the next decision.
Sentinel offers four custom night guard options, each made in our Florida lab from your impression or qualifying digital scan:
- Comfort Guard: A 2 mm soft EVA guard for a flexible, cushion-like feel.
- Hybrid Guard: A 2 mm dual-laminated guard with soft EVA against the teeth and hard copolyester on the outside.
- Hard Guard: A 2 mm hard copolyester guard with a firm, smooth biting surface.
- Durability Guard: A thicker 3 mm hard copolyester option for people who need a more substantial guard.
Each is custom-made and hand-finished to your teeth. The right choice depends on how intensely you grind, your dental history, and the feel you are most likely to wear consistently. You can compare all four options on our custom night guards collection page.
What about daytime clenching?
Awake clenching is different from nighttime grinding. During the day, many people notice the habit while working, driving, concentrating, exercising, or feeling stressed—and can begin to interrupt it once they recognize it.
A full-arch night guard is not always the most practical choice for waking hours. Sentinel’s No-Show Day Guard is made for daytime use, covering the back teeth while leaving the front teeth clear. Its purpose is to break up back-tooth contact while allowing you to speak more naturally than with a full-arch guard.
How to care for an occlusal guard
Good care helps keep your guard comfortable and in good condition. After wearing it, rinse it with cool water, clean it gently with a soft toothbrush and mild soap or a cleaner made for dental appliances, and allow it to dry fully before putting it in its ventilated case.
Avoid hot water, dishwashers, and leaving your guard in a hot car or direct sun. Heat can distort dental appliance materials. Bring your guard to routine dental appointments when possible so your dentist can check its condition and your bite over time.
Frequently asked questions
Can an occlusal guard stop teeth grinding?
An occlusal guard creates a protective barrier between the teeth, but it does not necessarily stop the underlying clenching or grinding habit. If you are concerned about why it is happening or your symptoms continue, talk with a dentist.
Can I replace my dentist-prescribed splint with a night guard?
Ask the prescribing dentist first. A therapeutic splint may have a specific purpose that a standard protective guard is not designed to replace.
Should I choose an upper or lower night guard?
Either may work when it is properly made for your teeth and bite. Existing dental work, comfort, and your individual tooth anatomy can all affect the best choice. Sentinel offers upper and lower options across its night guard range.
How long does a custom night guard last?
Longevity depends on the material, the intensity of grinding, and care. Sentinel’s general useful-life guidance is two to five years, though heavy grinding can shorten that timeline. Replace a guard if it develops a crack, hole, rough edge, major wear, or a meaningful change in fit.
The bottom line
An occlusal guard and an occlusal splint can sound interchangeable, but they are not automatically the same thing. A custom night guard is designed to help protect teeth from the contact caused by clenching and grinding. A dentist-directed splint may serve a more specific clinical purpose and should be selected and monitored accordingly.
If your goal is everyday protection from grinding or clenching, Sentinel offers custom-made soft, hybrid, hard, and 3 mm durability guards—hand-finished in our Florida lab and backed by our 100-Night Outcome Guarantee.
Compare Sentinel’s custom night guards →