If you have been given a night guard or jaw splint for jaw pain, headaches, clenching or other symptoms, it can be frustrating when you wear it as instructed and nothing seems to improve. It can be even more concerning if your jaw pain or other symptoms begin to feel worse.
So, can a night guard make TMJ worse? In some circumstances, an appliance that is not appropriate for the underlying problem, does not fit correctly, or changes the way forces are distributed across the teeth and jaw may contribute to new or increasing symptoms. However, worsening pain does not automatically mean the night guard itself is the cause.
Sometimes the more important issue is that the appliance is not addressing the main source of your symptoms.
Jaw and facial pain can be complex. Muscle pain, problems involving the temporomandibular joints (TMJs), headaches, dental pain and nerve-related pain can produce overlapping symptoms. Some people may also have more than one contributor to their pain at the same time.
This is why an appliance that is appropriate for one person may not necessarily be appropriate for another.
What is the difference between a night guard and a jaw splint?
Although the terms are sometimes used interchangeably, night guards and therapeutic jaw splints may be prescribed for different reasons.
A night guard is commonly used to protect the teeth from the effects of grinding or clenching. It provides a physical barrier between the upper and lower teeth, helping to reduce tooth wear and protect dental restorations.
A TMJ splint may be prescribed as part of the management of a diagnosed temporomandibular disorder (TMD). Depending on the diagnosis and design of the appliance, its purpose may extend beyond simply protecting the teeth.
This distinction matters because protecting your teeth and managing the source of jaw or facial pain are not necessarily the same thing.
If your symptoms are primarily caused by something an appliance cannot address, wearing one may have little effect on your pain even if it is successfully protecting your teeth.
Why might my night guard or jaw splint not be helping?
There isn’t one explanation that applies to everyone. If an appliance hasn’t helped, several factors may need to be considered.
The original diagnosis may need to be reconsidered
An effective management plan starts with understanding what is contributing to your symptoms.
Jaw pain does not automatically mean the temporomandibular joint itself is the source of the problem. Pain may arise from the jaw muscles, the joint, teeth or surrounding structures. Headache disorders and some types of nerve-related pain can also be experienced around the jaw and face.
These symptoms can overlap, and an appliance will not necessarily be appropriate for every source of pain.
If the night guard or splint was provided without a clear understanding of the underlying problem, or if your symptoms have changed since it was prescribed, it may be time to revisit the diagnosis rather than simply trying another appliance.
The appliance design or fit may not be right
Not all night guards and jaw splints are the same.
Their design, the teeth they cover, the material used and the way the upper and lower teeth contact the appliance can vary. An appliance also needs to fit appropriately and may require professional review over time.
If something doesn’t feel right, particularly if you notice significant pressure or discomfort around an individual tooth or one area of your mouth, it should be assessed rather than ignored.
How you are wearing it matters
An appliance should be worn according to the instructions provided for your particular condition and appliance.
Wearing it for longer, more frequently or at different times of the day in the hope that it will work faster is not necessarily beneficial. Similarly, inconsistent use may make it difficult to assess whether the appliance is achieving its intended purpose.
If you’re unsure how often you should be wearing your night guard or splint, check with the clinician managing it rather than changing the wearing schedule yourself.
There may be more than one contributor to your pain
TMD and orofacial pain do not always have a single cause.
Your jaw joints and muscles also do not work in isolation. Depending on the individual, factors such as daytime clenching, muscle tension, neck and postural strain, sleep quality, stress, headaches and other pain conditions may need to be considered alongside the jaw itself.
This doesn’t mean these factors are necessarily causing your TMD. It means they may influence how much load is placed on the jaw or how symptoms are experienced.
A splint may therefore be useful for one part of the problem without addressing everything contributing to your symptoms.
Can a night guard or jaw splint make TMJ symptoms worse?
It is possible for symptoms to change or increase while wearing an appliance, and this should not simply be assumed to be a normal part of treatment.
There may be a short adjustment period when you first begin wearing a night guard or splint. However, new or progressively worsening symptoms warrant review.
Contact the clinician managing your appliance if you develop:
- increasing jaw or facial pain
- reduced ability to open your mouth
- new or worsening jaw locking
- significant pressure or pain affecting individual teeth
- a change in the way your teeth meet that persists after removing the appliance.
A persistent change in your bite is particularly important to have assessed. Your teeth may feel slightly different immediately after removing some appliances, but a change that continues should not simply be ignored.
Should I stop wearing my night guard if it hurts?
If wearing your appliance is associated with increasing pain or new symptoms, contact the clinician who prescribed or manages it for advice.
Rather than repeatedly adjusting the appliance yourself, changing how you wear it or purchasing a different mouth guard, it is important to establish what is happening.
The key question isn’t simply:
“Which splint should I try next?”
It is:
“Why am I still experiencing these symptoms?”
That distinction is important because repeatedly replacing appliances without reassessing the underlying problem may simply repeat the same approach without addressing the reason your symptoms are continuing.
What if I have already tried several night guards or splints?
This is where reassessment becomes particularly important.
Some people with persistent jaw and facial pain have already tried several night guards, splints or other treatments before seeking further assessment. If each appliance has provided little improvement, another slightly different appliance is not automatically the answer.
A thorough assessment can reconsider your history, symptom pattern and physical findings and explore whether the pain appears to be muscular, joint-related, dental, headache-related, nerve-related or involves several overlapping contributors.
From there, your clinician can determine whether your existing appliance remains appropriate, whether it needs to be modified, whether a different appliance has a clinical role, or whether management needs to take a different direction.
When should my night guard or jaw splint be reviewed?
You don’t need to wait until an appliance becomes unbearable before asking for it to be reviewed.
If your night guard is not helping, or you have been wearing a jaw splint as directed and your symptoms are not improving, a review can help establish why.
This is particularly important if you are experiencing increasing pain, locking, reduced jaw opening, pressure on individual teeth or a persistent change in your bite.
The aim should not be an endless cycle of adjusting, replacing and trying different appliances. It should be to understand the underlying problem and make sure the treatment being used is appropriate for your diagnosis.
At TMJ Centre Melbourne, assessment considers your history, symptoms and physical findings before determining the most appropriate management approach. Where relevant, this may also involve considering broader factors such as sleep, posture, muscle patterns and other contributors to jaw loading.
A splint can be a useful tool when it is appropriate for the condition being treated, but it is still only one potential part of a broader, diagnosis-led approach.
If your current night guard or jaw splint isn’t helping, reassessing why may be more useful than simply replacing it.