Bruxism: Understanding Teeth Grinding and Jaw Clenching

Bruxism, commonly known as teeth grinding or jaw clenching, affects many Australians—often without them realising it. Whether it occurs during the day or while sleeping, this repetitive jaw muscle activity can damage teeth, strain the jaw muscles and affect your overall wellbeing. Early recognition and appropriate management can help prevent long-term complications and protect your oral health.

What Is Teeth Grinding and Jaw Clenching?

Teeth grinding and jaw clenching involve repetitive jaw-muscle activity, commonly referred to as bruxism, it can occur in two main forms:

Awake (Daytime) Bruxis

Awake bruxism usually involves unconscious clenching of the teeth during the day. It is often linked to:

• Stress or anxiety

• Emotional tension or distress

• Concentration or focus habits (e.g. working at a computer)

• Certain medications or substance use

People often do not realise they are clenching until symptoms develop.

Sleep Bruxism

Sleep bruxism occurs during sleep and involves repetitive masticatory muscle activity, which can include grinding, clenching or tapping. It may be associated with medical, neurological, psychiatric or sleep-related conditions.

Sleep bruxism is commonly associated with obstructive sleep apnoea, where the body may respond with jaw movements during breathing interruptions.. The Sleep Health Foundation provides additional information about sleep disorders and their management.

 

Why Do People Grind Their Teeth?

Bruxism does not usually have a single cause. Instead, it develops through a combination of biological, psychological and lifestyle factors. The following factors are associated with an increased likelihood of developing bruxism:

• Stress, anxiety and emotional distress

• Sleep disorders (particularly obstructive sleep apnoea)

• Smoking, alcohol consumption and excessive caffeine intake

• Certain medications (such as some antidepressants, ADHD medications and antiseizure medications)

• Neurological or psychiatric conditions

• Recreational drug use

• Daytime oral habits (such as nail biting, cheek biting or persistent jaw clenching)

• Family history of bruxism

Understanding these factors can help guide prevention and treatment.

Signs You May Be Grinding Your Teeth

Bruxism often goes unnoticed until symptoms become more obvious. Common signs and symptoms include:

• Tooth sensitivity or generalised tooth pain

• Visible flattening or wear of the teeth

• Clicking, popping or discomfort in the jaw joint (TMJ)

• Limited mouth opening or occasional “locked” jaw

• Morning headaches

• Tightness, fatigue or pain in the jaw muscles

• Jaw stiffness or facial pain (especially on waking)

• Disrupted sleep or waking with jaw discomfort

In many cases, a partner may notice grinding sounds during sleep.

What Happens if Teeth Grinding is Left Untreated?

If left untreated, ongoing bruxism can lead to progressive damage to the teeth, jaw and supporting structures. Possible complications include:

• Progressive tooth wear and enamel loss

• Chipped or cracked teeth

• Damage to fillings, crowns, veneers and other dental restorations

• Gumline wear lesions (abfractions)

• Increased risk of temporomandibular joint (TMJ) disorders

• Persistent jaw dysfunction or chronic facial pain

• In severe cases, tooth fracture or tooth loss

Early diagnosis and appropriate management can help prevent permanent damage and preserve your long-term oral health.

Treatment Options for Teeth Grinding and Jaw Clenching

Management of bruxism focuses on identifying contributing factors, protecting the teeth and reducing muscle overactivity. Treatment may include managing associated medical conditions, protecting the teeth with dental appliances, relieving muscle tension and making lifestyle or behavioural changes.

Dental Protection

• Occlusal splints (night guards): Custom-made appliances worn at night to protect teeth from grinding and reduce strain on jaw muscles

• In some cases, mandibular advancement appliances (MAS) may be considered if sleep-disordered breathing is suspected

Muscle and Symptom Management

• Physiotherapy for jaw muscle tension and TMJ function

• Jaw relaxation and stretching exercises

• Warm compresses to reduce muscle tightness

• In certain cases, botulinum toxin injections may be recommended to temporarily relax overactive jaw muscles

Lifestyle and Behavioral Strategies

• Stress reduction techniques (e.g. meditation, yoga, or deep breathing)

• Reducing caffeine and alcohol intake

• Avoiding smoking

• Improving sleep hygiene (e.g. maintaining a regular sleep schedule and limiting screen time before bed)

• Behavioral awareness strategies, such as:

• • •  Setting phone reminders to “relax the jaw”
    • Using visual cues (e.g. sticky notes) to reduce daytime clenching
    • Training the jaw to rest in a “lips together, teeth apart” position

Screening and the Role of Your Dental Team

Regular dental visits play an important role in identifying early signs of bruxism. The Australian Dental Association also provides useful advice on protecting your oral health. During your appointment, we may:

• Examine teeth for wear, fractures or sensitivity

• Assess jaw muscles and temporomandibular joint (TMJ) function

• Ask about headaches, sleep quality or jaw pain

• Discuss stress levels and lifestyle factors

• Enquire about sleep symptoms or partner observations

• Recommend further assessment or referral if needed

Early detection allows for more effective and conservative management.

Your Next Steps

If you or your partner notices signs of teeth grinding, jaw pain, morning headaches or worn teeth, book an assessment with our team.

151 Tower St, Panania NSW 2213 Call us on (02) 9773 9132 pananiadentalsurgery@gmail.com