Authored by Dr Sam Kim
Key points
- Load reduction refers to reducing the forces on the temporomandibular joint (TMJ).
- It sits at the centre of every treatment plan, regardless of the stage of temporomandibular disease (TMD).
- Nighttime clenching and grinding is a significant source of load for most patients.
- A correctly designed TMJ splint, tailored jaw muscle management, and physiotherapy work together to reduce the force reaching the joint.
Load reduction is a phrase you’ll hear again and again once you start treatment for TMJ disease, whether you’ve just noticed your first symptoms or you’ve been managing joint changes for years.
Why your jaw joint needs protecting
Load reduction in TMJ care means identifying and systematically reducing the forces stressing the joint, both while you sleep and during the day. Your TMJ is already working hard every time you talk, chew or yawn. Add a weakened or displaced disc, and each of those movements becomes another chance for damage to already-exposed joint surfaces.
The biggest source of load: nighttime clenching
Nighttime clenching and grinding can place substantial mechanical load on the TMJ. Given that you’re hopefully asleep for about 8 hours a night, this is one of the most significant sources of load. Because it occurs during sleep, you can’t consciously change nighttime clenching and grinding, just as you can’t stop yourself dreaming. So, if willpower isn’t the answer, what is?
TMJ splints
A splint can’t stop you clenching, but a properly designed and precisely calibrated TMJ splint can significantly reduce the peak force that reaches your jaw joint during clenching. A TMJ splint is digitally designed and precisely calibrated to where your jaw joint sits, both at rest and during sleep. It’s different from a standard dental night guard, which offers only modest protection. Critically, a TMJ splint is engineered to prevent the grinding motion itself (the lateral sliding of the jaw), which is the primary mechanism by which standard splints wear down and lose effectiveness. TMJ splints are more complex and require more skill to design well. A poorly designed splint can further destabilise your jaw, so it’s important that yours is created by a clinician with experience in TMJ mechanics. Learn more about TMJ splints
Managing jaw muscle overactivity
If you’re a chronic clencher, you may have significantly enlarged chewing muscles, which are another source of load on the joint. Our clinicians are experienced in managing jaw muscle overactivity. We measure your masseter muscles during each TMJ assessment. If they are enlarged, we may recommend physiotherapy or prescription-only treatments to help reduce muscle size. These options need careful, ongoing monitoring. Without proper oversight, treatment can shift load onto other chewing muscles, leading to headaches and neck pain rather than relief.
Posture’s impact on your TMJ
Your jaw doesn’t work in isolation. It’s closely connected to your neck, upper back and overall posture. Many TMJ patients have a forward-head posture, which pushes the lower jaw forward and adds chronic pressure to the joint throughout the day. A physiotherapist working within a TMJ-focused framework can help you ease muscle tension and maintain a better jaw position while you’re awake. Learn more about jaw exercises for TMJ disorder
How can TMJ Clinics help?
TMJ Clinics is Australia’s largest dedicated TMJ provider, having treated nearly 10,000 patients for TMJ disorder. Our multidisciplinary team of dentists and physiotherapists have all completed additional training in TMJ management and work from our comprehensive, evidence-based Load Reduction Protocol, so there are no gaps between referrals and no conflicting advice. TMJ Clinics can be found in many Australian cities, including Adelaide, Brisbane, Gold Coast, Canberra, Melbourne, West Melbourne, Bankstown, Kogarah, North Sydney, Norwest and Newcastle. If you keep waking up with a tight jaw, then we’d encourage you to pay us a visit. Book an appointment
Frequently asked questions
Does load reduction treatment stop clenching?
Not quite. It’s hard to stop yourself doing something while you’re asleep and unaware of it. A TMJ splint works by reducing the force reaching your jaw joint each time you clench.
Is load reduction only for people with severe symptoms?
No. Load reduction is relevant from the earliest signs of TMJ disease, and it remains part of ongoing management for as long as you need it, regardless of how advanced your symptoms are.
How long do I need to keep this up?
For most people, load reduction isn’t a phase that ends. It’s an ongoing strategy for protecting your jaw joint.
Disclaimer
All information is general and not intended as a substitute for professional advice. Any surgical or invasive procedure carries risks.
References
- Zhu, Y., Zheng, F., Gong, Y., Zhu, J., Yin, D., & Liu, Y. (2024). Effect of occlusal contact on TMJ loading during occlusion: An in silico study. Computers in biology and medicine, 178, 108725. https://doi.org/10.1016/j.compbiomed.2024.108725
- Physiopedia. (n.d.). Forward head posture.https://www.physio-pedia.com/Forward_Head_Posture
