Treatments

Bruxism, TMJ, and Occlusion

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Bruxism, TMJ, and occlusion

What is bruxism?

Bruxism is an involuntary and parafunctional masticatory muscle activity characterized by the clenching or grinding of the teeth, which can occur during sleep (sleep bruxism) or while awake (awake bruxism). Currently, bruxism is considered a multifactorial condition with dental, musculoskeletal, neurological, and psychosocial implications.

Types of Bruxism

We distinguish two main variants; both forms can coexist in the same individual and have similar clinical repercussions.

Sleep bruxism

Rhythmic (phasic) or sustained (tonic) activity of the masticatory muscles during sleep, lacking functional purpose.

Awake bruxism

Manifests during consciousness as clenching, sustained tooth contact, or jaw tension, generally associated with psychological factors such as stress or anxiety.

Diagnostics

The diagnosis of bruxism is based on a combination of clinical data, a detailed medical history, and, in specific cases, complementary diagnostic studies.

Possible bruxism

Based on self-reporting by the patient (subjective symptoms).

Probable bruxism

Confirmed through clinical examination (tooth wear, muscle hypertrophy, attrition facets, dental sensitivity, masticatory pain, etc.).

Confirmed bruxism

Diagnosis performed via polysomnography along with electromyographic (EMG) muscle activity recording.

Causes of Bruxism

Bruxism does not have a single cause, but is rather the result of an interaction among multiple factors:

Neurological

Alterations in central motor control mechanisms and REM sleep modulation.

Psychological

Stress, anxiety, mood disorders, and personality traits.

Genetic

Studies have demonstrated a hereditary predisposition in certain cases.

Pharmacological

The use of certain medications, such as SSRI antidepressants, can be associated with increased bruxism.

Occlusal

Although currently considered a secondary factor, occlusal interferences may contribute in specific cases.

Symptoms of Bruxism

Signs and symptoms associated with bruxism include:

Pathological tooth wear (attrition)

Dental hypersensitivity

Muscle pain in masseter and temporal muscles

Tension headaches

Temporomandibular joint (TMJ) disorders

Fractures of teeth or restorations

Treatment Options

There is no single definitive cure for bruxism, but management focuses on reducing triggering factors, protecting dental structures, and relieving musculoskeletal symptoms.

Occlusal splints (nightguards)

Removable devices, generally made of rigid acrylic, that redistribute occlusal forces, protect enamel, and reduce muscle activity.

Psychological or behavioral therapy

Stress management techniques, cognitive-behavioral therapy, and relaxation training to address awake bruxism and anxiety triggers.

Physical therapy and myofunctional therapy

Targeted massage, jaw exercises, and myofascial release techniques

Pharmacotherapy

Short-term use of muscle relaxants or other prescribed medications under clinical supervision for severe acute episodes.

Mandibular Advancement Devices (MADs)

Indicated when bruxism coexists with snoring and/or sleep apnea.

FAQ´S

Frequently Asked Questions About Bruxism

What are the main symptoms of bruxism?

Unusual tooth wear, facial pain, dental sensitivity, jaw muscle fatigue upon waking, and frequent headaches.

Is it always necessary to wear a nightguard?

Not always, but nightguards are the standard clinical treatment to protect enamel and relax the musculature during sleep.

Can stress cause bruxism?

Yes, emotional stress is one of the primary triggering factors, although occlusal and anatomical factors can also play a role.

What damage can occur if it is left untreated?

In the long term, untreated bruxism can lead to tooth fractures, gum recession, and irreversible damage to the temporomandibular joint (TMJ).

Is botulinum toxin (Botox) effective for bruxism?

Es una opción complementaria muy eficaz para reducir la hiperactividad de los músculos maseteros y aliviar el dolor asociado.