Logan Steele
The masseter muscle is one of the largest muscles in the jaw, covering a significant portion of the sides of the face. It is activated when chewing, biting nails, or clenching and grinding teeth. Toothaches are a common reason for patients to seek dental care, but not all toothaches are caused by dental issues. Sometimes, the masseter muscle can refer pain to the molars, resulting in what is known as mirror-image pain. This occurs when the site and source of pain are different but the pain is referred in a predictable manner. This can cause confusion for both patients and clinicians, highlighting the importance of a thorough evaluation to determine the correct source of tooth pain and provide appropriate treatment.
| Characteristics | Values |
|---|---|
| Can masseter muscle cause tooth pain? | Yes, the masseter muscle can refer pain to the maxillary or mandibular (lower) molars. |
| What is the masseter muscle? | The masseter muscles cover a significant portion of the sides of the face, extending from the cheekbone/ear area down to the bottom of the jaw. |
| How to identify masseter muscle movement? | Place your hands on your cheeks and squeeze your teeth together. The movement you feel is the masseter muscles flexing. |
| What causes tooth pain? | Tooth pain can be caused by dental infections, musculoskeletal, neuropathic, or neurovascular issues, and muscle referral patterns. |
| How to relieve tooth pain caused by the masseter muscle? | Trigger point injection with local anesthesia into the affected muscle, mouthguard, physical therapy exercises, anti-inflammatory medication, joint surgery, massage therapy, oral appliance therapy, jaw exercises, warm moist compress, and TMJ therapy. |
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What You'll Learn
- Masseter muscle can refer pain to the mandibular (lower) molars
- Masseter muscle is the strongest muscle in the human body
- Toothaches may stem from musculoskeletal, neuropathic, or neurovascular issues
- TMJ therapy can help relieve tension and reduce the number of monthly headaches
- Tooth extraction may contribute to TMD issues
Masseter muscle can refer pain to the mandibular (lower) molars
The masseter muscle can refer pain to the mandibular (lower) molars. This is known as "referred pain", where the site of pain differs from the source. Toothaches are often the main reason patients seek dental care, but not all toothaches are caused by issues with the teeth themselves. Some toothaches may stem from musculoskeletal, neuropathic, or neurovascular issues. In the case of the masseter muscle, it is one of the strongest muscles in the human body and covers a significant portion of the sides of the face, extending from the cheekbone/ear region down to the bottom of the jaw. When the masseter muscle is overworked through actions such as clenching, grinding, chewing gum, or biting nails, it can cause referred pain in the mandibular molars.
This referred pain can be a source of confusion for both patients and clinicians. It is important to take a systematic approach when evaluating oral and facial pain patients, listening to the patient's history, and conducting a thorough examination to arrive at the correct diagnosis. For example, a patient may experience a toothache that is not odontogenic in nature but is instead referred pain from the masseter muscle. A comprehensive history, thorough head and neck evaluation, and an understanding of anatomy are necessary to reach the correct diagnosis and manage the non-odontogenic toothache effectively.
Trigger points in the masseter muscle can cause referred pain in the mandibular molars. Trigger points are taut bands within the muscle that, when palpated, reproduce the pain referral pattern. This can be diagnosed by inducing a similar pain pattern or relieving the pain with a local block. Treatment options for managing referred pain from the masseter muscle may include trigger point injections with local anesthesia, physical therapy exercises, mouthguards, anti-inflammatory medication, or in some cases, joint surgery.
It is important to note that toothaches can also be caused by dental issues such as cavities, enamel erosion, or dental infections, so a detailed evaluation of the teeth, muscles, and jaws is necessary to determine the underlying cause of the pain.
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Masseter muscle is the strongest muscle in the human body
The masseter muscle is one of the muscles of the temporomandibular joint (TMJ) and is often considered the strongest muscle in the human body based on its weight. It is a skeletal muscle, attached to the bones, and is the primary chewing muscle. The masseter muscle covers a significant portion of the sides of the face, extending from the cheekbone/ear region down to the bottom of the jaw.
The strength of a muscle can be defined by its capacity for either resistance or exertion. The masseter is considered the strongest because it can generate the largest measurable force of any single muscle. This is due to its densely packed muscle fibres and very short-armed lever. When all the muscles of the jaw work together, the masseter can exert a force of 55 pounds (25 kilograms) on the incisors and 200 pounds (90.7 kilograms) on the molars. This force is so much greater on the molars than the incisors because of the difference in leverage. The masseter pulls the jaw upwards and has a wide attachment along the jaw, so it is like multiple small muscles working in parallel.
The masseter is also one of the most stressed muscles in the body. It is often affected by emotional tension, which can cause the muscle to tighten up. This tension is registered by the brain and nervous system, creating a cycle of stress. Poor posture, particularly misalignment of the pelvis and psoas, can also cause physical tension in the masseter, as the jaw is at the top of the spine.
While the masseter is often considered the strongest muscle in the body, there is no single answer to this question as there are different ways to measure strength. For example, the gluteus maximus is the largest muscle in the body, and the heart is the hardest-working muscle.
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Toothaches may stem from musculoskeletal, neuropathic, or neurovascular issues
Toothaches are the main reason patients seek dental care, but not all toothaches are tooth-related. Some toothaches may stem from musculoskeletal, neuropathic, or neurovascular issues. In some cases, toothaches may be referred from nearby orofacial structures, where the site and source of pain differ. This is known as referred pain.
The masseter muscle is one of the largest and strongest muscles in the human body, covering a significant portion of the sides of the face, extending from the cheekbone/ear region down to the bottom of the jaw. The superficial masseter muscle can cause referred pain in the maxillary (upper) and mandibular (lower) molars. The masseter muscle can also refer pain to the mandibular anterior teeth, mimicking a toothache. This is known as mirror-image pain, where the site and source of pain are on different parts of the body, but the pain is referred in a predictable manner.
Trigger points in the masseter muscle can cause referred pain in the teeth. These trigger points are typically palpable nodules within taut muscle bands that can radiate pain locally or along predictable patterns. Trigger points can develop due to muscle overuse or direct trauma to the muscle, such as from bruxism (teeth grinding) or clenching.
Toothaches of muscular origin can be a source of confusion for both patients and clinicians. A thorough evaluation of the patient's history, head and neck, and understanding of anatomy is essential to reaching the correct diagnosis and managing the pain. Treatment options may include trigger-point injections with local anesthesia into the affected muscle to reduce toothache or mouthguards to reduce forces of compression on the joints.
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TMJ therapy can help relieve tension and reduce the number of monthly headaches
The masseter muscle is one of the largest muscles in the jaw and can cause referred pain in the molars. This is because the masseter muscle covers a significant portion of the sides of the face, extending from the cheekbone/ear region down to the bottom of the jaw. Taut bands, known as trigger points, are typically present within the involved muscles.
TMJ, or temporomandibular joint dysfunction, causes pain and tenderness in the jaw joints and surrounding muscles and ligaments. Teeth grinding, jaw injuries, arthritis, and everyday wear and tear are all causes of TMJ. TMJ headaches are one of the most common symptoms of TMJ disorder, and they can be caused by inflammation and tension in the muscles surrounding the jaw joint. These headaches can range from mild to severe and can be accompanied by other symptoms such as jaw pain, earaches, and difficulty opening and closing the mouth.
TMJ treatments may include medication, mouth guards, physical therapy, or oral surgery. TMJ specialists can help relieve tension and reduce the number of monthly headaches by teaching patients exercises and stretches that can improve jaw mobility and decrease muscle tension. They can also teach patients how to properly relax their jaw muscles and avoid habits that can cause jaw and head pain. Bite guards and splints are often used in treating TMJ headaches, as they are worn at night to prevent grinding and clenching of the teeth, thereby reducing pressure on the jaw joint and decreasing the likelihood of jaw and head pain.
TMJ specialists can also help with bite stabilization, which involves wearing a temporary device called an orthotic over the teeth. This allows the specialist to make simple adjustments to the plastic without altering the teeth until the bite is stable. After the first two phases, the TMJ specialist will likely recommend one of the many long-term treatment options.
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Tooth extraction may contribute to TMD issues
Tooth extraction may contribute to temporomandibular joint dysfunction (TMD) issues. TMD causes pain and tenderness in the jaw joints and surrounding muscles and ligaments. It can also lead to chronic pain, limited chewing function, and bruxism-related wear and tear.
TMD can be caused by several factors, including teeth grinding, jaw injuries, arthritis, and everyday wear and tear. The masseter and temporalis muscles are the two largest muscles involved in jaw movement and are often the culprits of jaw pain. The masseter muscles cover a significant portion of the sides of the face, extending from the cheekbone or ear area down to the bottom of the jaw. The temporalis muscles, on the other hand, cover a large portion of the temples and fan out over the side of the skull, tapering to a narrow attachment at the base of the jaw.
When these muscles are overworked through activities such as clenching or grinding the teeth, chewing gum, biting nails, or any action that causes the teeth to touch, they can refer pain to the teeth. This referred pain can be confusing for both patients and clinicians, as the site of pain is different from the actual source. In the case of the masseter muscle, it can refer pain to the maxillary or mandibular molars.
Tooth extraction, particularly wisdom tooth extraction, has been anecdotally linked to the development of TMD. Some patients report experiencing jaw pain and clicking after their wisdom teeth removal, which they did not have before the procedure. However, it is important to note that an association does not prove causation. While there is a higher pre-surgical incidence of TMD in patients seeking tooth extractions, it is suggested that a comprehensive pre-surgical assessment of the temporomandibular joint may help reduce the incidence of TMD in this population.
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Frequently asked questions
Yes, the masseter muscle can cause referred pain in the mandibular (lower) molars.
Referred pain is when the site of pain differs from the actual source of the pain.
To diagnose referred pain, healthcare professionals either induce a similar pain pattern or relieve the pain with a local block.
Referred pain in the masseter muscle can be caused by stress, trauma, repetitive strain, overuse, malocclusion, injury, or bruxism.
You can relieve referred pain in the masseter muscle by massaging the muscle, performing a masseter stretch, or using a mouthguard.
