Can Botox Help TMJ Disorder? What Current Research Reveals

Medically Reviewed By:

Dr. Chaz Fausel, MD

Dr. Chaz Fausel is a Denver-based interventional orthopedics specialist and Regenexx educator, trained at Emory and the Centeno-Schultz Clinic.

Temporomandibular joint (TMJ) disorder can interfere with daily activities and make routine tasks uncomfortable. To help manage its symptoms, physicians may recommend various treatments. Some providers may claim that Botox® injections may serve as a cure for TMJ disorder. This raises concerns regarding its appropriateness and the level of scientific support. 

This article explores why such a claim may be misleading and reviews what current research indicates about the use of Botox for TMJ disorder-related symptoms.

What Is Botox?

Botox is the brand name for a commercial form of botulinum toxin, a substance produced by the Clostridium botulinum bacteria. From the World Health Organization ^[1]:

Clostridium botulinum is a bacterium that produces dangerous toxins (botulinum toxins) under low-oxygen conditions. Botulinum toxins are one of the most lethal substances known. Botulinum toxins block nerve functions and can lead to respiratory and muscular paralysis.

In clinical settings, botulinum toxin is used in significantly lower doses to temporarily reduce muscle tension. This mechanism—blocking the communication between nerves and muscles—allows Botox to reduce muscle tightness for a limited period.

Currently, Botox is approved for cosmetic applications and certain neurological conditions such as chronic migraines and muscle spasticity. In cosmetic use, it reduces the appearance of wrinkles by relaxing targeted muscles, though it may also affect facial expressions. For headache management, it may help relax muscles that can contribute to nerve irritation. 

However, its effects are temporary and typically last for about three to six months.

What Are The Side Effects Of Botox?

Can a substance that disrupts the neuromuscular junction be used without potential side effects? Research suggests otherwise. Studies have reported several physiological changes following botulinum toxin injections, including:

• A reduction in muscle size and signs of increased muscle atrophy ^[2].
• Changes in how muscles sense tension and length ^[3].
• Changes in how muscle cells function at the cellular level^[4].
• Long-lasting effects on muscle coordination and control ^[5].
• Reduced strength and density in bones supporting the injected muscles ^[6].

These findings suggest that Botox should not be considered without weighing potential risks.

What Is TMJ Disorder?

The TMJ is a hinge-like structure that includes cartilage and a meniscus-like disc that helps guide smooth movement. Like other joints, the TMJ can be affected by injuries involving the cartilage, disc, or surrounding ligaments that support joint stability and function.

In some individuals, chronic stress on the TMJ, such as from sustained forward head posture, may contribute to ongoing joint overload. Over time, this can result in wear and tear that may contribute to joint degeneration, including arthritis. When the joint becomes irritated, the surrounding muscles may respond with increased tension or spasm.

Botox has been used in some cases to target these muscle spasms. The following section explores that concept and examines current research on this approach.

TMJ Muscle Spasms

Why do muscles spasm around joints in the body? In many cases, this response occurs due to joint instability or injury. Instability occurs when the ligaments that support a joint become compromised. When this happens, muscle spasms may occur as the body attempts to stabilize the area.

Similarly, in response to joint injury, protective muscle contractions may develop to limit movement and support healing. These spasms are part of the body’s natural strategy to reduce stress on the affected joint.

Because muscle spasms can serve a protective function, their elimination may not always be appropriate. While the discomfort associated with muscle tension can make symptom relief seem appealing, addressing only the spasms, without resolving the underlying cause, may interfere with the joint’s natural recovery process.

If muscle spasms are reduced too quickly, the protective mechanism they provide may be removed. This can result in continued stress on a joint that remains unstable or healing, which over time may contribute to further degeneration or the development of arthritis.

Botox For TMJ Disorder

An individual diagnosed with TMJ disorder was informed that four Botox injections would provide a cure. However, evaluating whether this recommendation is supported by clinical research is essential.

• One study reported a reduction in nighttime bruxism—muscle-related teeth grinding—following Botox injections. These effects lasted up to three months ^[7].
• Another study found Botox less effective than a night splint for reducing TMJ pain caused by bruxism, although it relaxed jaw muscles for three months ^[8].
• A 2022 review of 24 studies examining Botox for TMJ found limited evidence supporting its effectiveness for issues related to the joint itself ^[9].

Balancing The MOA, Risk, And Benefit For TMJ Disorder

Mechanism of action (MOA) refers to how a treatment produces its intended effects. For Botox, the goal is to reduce muscle spasms around the joint.

However, since muscle spasms may act as a protective response to joint instability or injury, this mechanism raises important questions. Suppressing the spasms without addressing the source of the problem may interfere with joint recovery.

The risks associated with Botox are not insignificant. Evidence has shown potential for long-term changes in muscle structure and nerve function following repeated injections. 

No long-term randomized controlled trials currently support Botox as a cure for TMJ disorder. If the cause lies within the joint, muscle-targeted injections may not address the root issue. Based on current research, the claim that four Botox injections are likely to cure TMJ disorder is not supported.

PRP As A Treatment For TMJ Disorder

Platelet-rich plasma (PRP) represents a fundamentally different approach to managing TMJ disorder symptoms. Instead of temporarily relaxing overactive jaw muscles, PRP targets the joint itself, particularly damage involving the meniscus or surrounding ligaments.

What does the research show? PRP has been studied in randomized controlled trials focusing on joint-related outcomes in TMJ disorders. One study found that intra-articular PRP injections were more effective than corticosteroid injections in reducing joint pain, with improvements maintained for up to 12 months ^[10].

A broader analysis of six randomized controlled trials evaluating PRP for TMJ disorders found that four showed greater benefit than hyaluronic acid (HA) or saline controls. Two studies did not show significant improvement. However, one positive and one negative study involved arthroscopic surgery, not injection-based treatment ^[11].

When limiting the analysis to injection-based studies, four reported favorable results, and two showed outcomes comparable to hyaluronic acid or saline. These findings provide early evidence that PRP injections may offer therapeutic benefits lasting up to 12 months^[11].

In terms of safety, no serious long-term adverse effects related to PRP injections for TMJ disorders have been reported in the published research to date.

Since PRP targets joint structures and has a favorable early safety profile, it may offer a more logical approach than injecting overactive jaw muscles with Botox. Current evidence does not support the claim that four Botox injections will cure TMJ disorders, while muscle-related risks from Botox have been documented.

Other Jaw-Related Conditions That May Be Addressed Using the Regenexx Approach

In addition to addressing symptoms related to TMJ disorder, procedures using Regenexx injectates may also be considered for other jaw and facial pain conditions. These conditions often involve joint instability, nerve irritation, or soft tissue dysfunction that may respond to interventional orthobiologic techniques. 

Below are several jaw-related disorders that may be evaluated by physicians in the licensed Regenexx network to determine if procedures using Regenexx injectates are appropriate.

Consider Alternative Options To Support TMJ Function And Comfort

TMJ disorder-related symptoms are often linked to underlying joint instability or tissue injury. While options like Botox may temporarily relax muscles, they do not address the root cause and may interfere with the body’s protective response.

Procedures using Regenexx processing utilize interventional orthobiologics to support the body’s natural healing. Physicians in the licensed Regenexx network can determine if this approach may help reduce pain and may help improve joint function.

Am I a Candidate?

To talk one-on-one with one of our team members about how the Regenexx approach may be able to help your orthopedic pain or injury, please complete the form below and we will be in touch with you within the next business day.

Medically Reviewed By:

Dr. Chaz Fausel, MD

Dr. Chaz Fausel is a Denver-based interventional orthopedics specialist and Regenexx educator, trained at Emory and the Centeno-Schultz Clinic.