Occlusal Splint: What It Does and How It's Made

If you've woken up with a sore jaw, a dull headache, or noticed your teeth look a bit shorter than they used to, you may have heard your dentist mention an occlusal splint. It's one of those terms that sounds technical but is actually a fairly simple idea. At Two Rocks Dental Care we talk patients through this often, because grinding and clenching are common and most people have questions before they commit to wearing something at night.

This guide walks through what an occlusal splint is, how it differs from a sports mouthguard, how a custom splint is actually made, and what to expect if your dentist suggests one for you.

What is an occlusal splint?

The word "occlusal" simply refers to how your upper and lower teeth meet when you bite down. A splint is an appliance that sits over your teeth and changes or manages that contact. So an occlusal splint dental appliance is a custom-made device, usually covering the upper or lower teeth, designed to sit between your bite.

Most splints are made from a hard, smooth acrylic. They're built to fit your mouth precisely, not pulled off a shelf. The idea is to give your teeth and jaw a stable, even surface to rest against overnight, instead of grinding directly on each other.

How an occlusal splint helps with grinding and clenching

Grinding your teeth at night, known clinically as bruxism, can wear down enamel over time and sometimes leads to cracked or sensitive teeth. Clenching puts ongoing pressure through the jaw muscles and joints, which some people notice as tightness, fatigue or soreness when they wake up.

A splint creates a barrier between your top and bottom teeth. Instead of tooth grinding against tooth, the forces land on the splint. This is one of the reasons dentists often suggest a splint when they see wear patterns, chips, or flattened edges during a check-up.

It's worth being honest here: a splint manages the effects of grinding, and results can vary from person to person. It doesn't stop the underlying urge to grind or clench, and no dentist can promise it will fix every symptom. What we can say is that it gives your teeth a buffer, and for many people it takes some of the load off the jaw joint too.

Occlusal splint for TMJ concerns

TMJ stands for the temporomandibular joint, which is the hinge joint connecting your jaw to your skull, just in front of your ear. When this joint or the muscles around it are under strain, people sometimes notice clicking, a feeling of tightness, or discomfort when chewing or opening wide.

An occlusal splint for TMJ-related symptoms works on the same basic principle as a grinding splint. By giving your bite an even, stable surface, it can help reduce some of the muscle tension that builds up around the joint. We'll always talk through what's realistic for your situation, because jaw joint issues can have several contributing factors, and a splint is one part of managing them, not a guaranteed fix.

If your jaw pain is persistent, or you're noticing locking, significant restriction in how wide you can open, or pain that's getting worse, it's worth having this looked at properly rather than guessing at the cause.

Occlusal splint vs night guard: what's the difference?

This is one of the most common questions people ask, and it's a fair one, because the terms get used loosely both online and in everyday conversation.

Night guard vs splint in plain terms

In general dental conversation, "night guard" and "occlusal splint" often describe the same type of custom appliance, one worn at night to manage grinding and protect teeth. Some practices use the terms interchangeably, and that's not unusual.

Where there can be a distinction is in design intent. A simpler protective guard is mainly there to stop tooth-on-tooth contact. A splint that's been adjusted more specifically for jaw position or muscle symptoms may involve a bit more fine-tuning of the bite surface. Your dentist will explain which approach fits your situation, and why, before you commit to anything.

How this differs from a sports mouthguard

A sports mouthguard is built for a completely different job. It's designed to cushion the teeth, lips and jaw against a sudden knock or impact during contact sport. It tends to be bulkier, often covers more of the gum line, and is made to absorb a hard hit rather than manage ongoing bite forces over months.

An occlusal splint, by contrast, is thinner, fits closely to the biting surfaces of your teeth, and is built to be worn comfortably for hours at a time, usually overnight. You wouldn't use a sports mouthguard as a substitute for a splint, and a splint isn't designed to protect against a footy or hockey injury. We make both at Two Rocks Dental Care, and if you play sport as well as grind your teeth, we can talk through whether you need one appliance or two.

You can read more about the custom guards we make for sport on our mouthguards page, and more detail on grinding and jaw splints on our splints page.

How a custom occlusal splint is made

A lot of people picture something fiddly or uncomfortable, but the process is straightforward.

• We start with a check-up to look at your teeth, bite and any wear patterns, and talk through your symptoms.
• We take an impression of your teeth, either with a putty-like material or a digital scan, to capture the exact shape of your bite.
• That impression is used to make a model of your mouth, which goes off to a dental lab.
• The lab builds your splint around that model, so it fits snugly over your own teeth rather than a generic shape.
• When it's ready, you come back in so we can fit it, check your bite feels even, and make small adjustments if needed.

Because every splint is built from your own impression, it should sit comfortably and predictably on your teeth. We always explain what to expect at each stage, and you can ask questions or raise concerns at any point along the way.

Looking after your splint

Once you have your splint, a few simple habits keep it in good shape:

• Rinse it under cool water before and after wearing it.
• Brush it gently with a toothbrush, the same way you'd clean your teeth.
• Store it in its case when you're not wearing it, away from heat.
• Bring it along to your regular check-ups so we can see how it's wearing and whether your bite has changed.

If it ever feels loose, cracked, or different to how it used to fit, get it checked rather than continuing to wear it as is.

Frequently asked questions

Does an occlusal splint stop grinding completely?

Not necessarily. A splint protects your teeth from the effects of grinding and can ease some muscle strain, but it doesn't remove the underlying habit. Results vary from person to person, and your dentist can talk through what's realistic for you.

Is an occlusal splint the same as a mouthguard for sport?

No. A sports mouthguard is built to absorb a sudden impact during contact sport, while an occlusal splint is designed to be worn for long periods, usually overnight, to manage bite forces from grinding or clenching.

How do I know if I need a splint rather than just watching and waiting?

This really depends on what's showing up in your mouth and how you're feeling. Signs like worn or flattened teeth, morning jaw tightness, or regular headaches are worth mentioning at your next check-up so we can look at your bite and talk through whether a splint makes sense.

Will my health fund cover an occlusal splint?

This depends on your level of cover and your fund's rules. We're a preferred provider for HBF, HCF and nib, which usually means a smaller out-of-pocket gap for eligible treatment, though it's never free. We can give you a written quote with item numbers so you can check your benefit directly with your fund. If you're new to the practice, our new patients page has details on what to expect at your first visit.

Can a splint be adjusted after it's made?

Yes, small adjustments are a normal part of the fitting process. If your bite feels uneven or the splint feels tight in one spot, let us know and we can refine it at a follow-up visit.

Getting started with a splint

If grinding, clenching or jaw discomfort has been bothering you, you don't need to work it out on your own or drive down to Joondalup to get it looked at. Our team at Two Rocks Dental Care can take a look at your bite, talk through whether an occlusal splint is a sensible option, and explain the pros and cons so you can make the choice that suits you.

You're welcome to choose a time online that suits your week, or call us on (08) 9502 9040 to ask a question first. Either way, our team at Two Rocks Dental Care is happy to help you work out what's right for your teeth and your jaw.

To book your visit, head to our online booking page or give us a call on (08) 9502 9040. We're located inside the Jupiter Health Two Rocks Medical Centre at 6 Constellation Entrance, Two Rocks, with our own dental entrance and parking right outside.