The aim of this study was to investigate the possible effects of the use of lavender, marjoram and vetiver oil via inhalation and/or massage application on the treatment of bruxism.

Bruxism is a repetitive jaw muscle activity characterized by clenching or grinding of the teeth and/or bracing or thrusting of the mandible. Due to increasing evidence suggesting that it may serve a physiological purpose, bruxism has been defined as jaw muscle activity that may occur during sleep and/or wakefulness.

Various methods have been proposed for the treatment of bruxism. These treatment approaches include pharmacological treatments (such as muscle relaxants and clonazepam), orthopedic treatments (such as stabilization splints and rigid stabilization appliances), needling treatments (including acupuncture, botulinum toxin type A, and dry needling), physical and behavioral approaches (such as relaxation training, stress management, biofeedback, and sleep hygiene instructions), manual treatments including exercises (trigger point therapy, soft tissue techniques, exercises, postural corrections, joint mobilizations, and cervical spine treatment), and other physical therapy modalities (including low-level laser therapy, therapeutic ultrasound, and short-wave diathermy).

Manual therapy, therapeutic exercise, and their combination have been shown to effectively reduce pain and improve mandibular function. Massage therapy, which activates the pain-gate mechanism, is an effective treatment option for pain relief. It also stimulates the parasympathetic nervous system and helps restore muscle length and flexibility. In addition, massage therapy improves local blood circulation and promotes the production of endogenous opioids, leading to relaxing effects and reduced pain perception. These effects are of particular interest in the management of bruxism; however, this treatment approach has not been adequately investigated despite its promising results.

Massage therapy can be combined with aromatherapy, one of the most commonly used complementary therapy methods. Its therapeutic effects are based on stimulation of the olfactory system and absorption of active molecules through the skin. Various studies have investigated the analgesic effects of aromatherapy massage using lavender essential oil. Lavandula angustifolia is a well-known medicinal and aromatic plant with anti-inflammatory and analgesic properties. In addition, it has antiseptic, soothing, circulation-stimulating, and cell-regenerating effects. Lavender oil has been reported to reduce pain in patients with various conditions, including neuropathic pain, rheumatoid arthritis, burns, and cancer-related pain. Apart from lavender oil, marjoram oil may contribute to pain control and anxiety reduction, while vetiver oil is known for its sedative effects. However, the effects of aromatherapy massage using these essential oils have not been adequately investigated in patients with bruxism.

The aim of this study is to evaluate the effects of lavender, marjoram, and vetiver essential oils administered through aromatherapy massage in patients with bruxism. Objective outcomes will be assessed through ultrasonographic evaluation of the masseter muscle, while subjective outcomes will be evaluated using patient-reported questionnaires. The findings of this study may contribute to the development of complementary treatment approaches for the management of bruxism.

Inclusion Criteria:

• • Patients between 18-25

  • Patients with full dentition including 2nd molars
  • Patients without facial asymmetry
  • Patients without history of sensitivity or allergy to plants
  • Patients without olfactory disorders

Exclusion Criteria:

• • Patients with systemic (asthma history) and/or neuromuscular disease

  • Patients with orofacial pain not caused by bruxism
  • Temporomandibular joint (TMJ) surgery or injection history
  • Use of any medical drug affecting the muscular system
  • Patients with developmental deformity or surgery history in the maxillofacial region (facial trauma history, resection history, etc.)
  • TMJ pathologies (major condylar changes seen on panoramic radiograph)
  • Radiotherapy and/or chemotherapy history
  • Ongoing orthodontic treatment
  • Removable prosthesis use
  • Inflammatory connective tissue diseases
  • Pregnancy
  • Obstructive sleep apnea
  • Local skin infection over the myofascial area
  • Reluctance to take responsibility for the work

Only female participants are eligible for this study, as the study population is restricted to women aged 18 to 25 years according to the study protocol.

Individual participant data (IPD) will not be made publicly available due to participant privacy considerations and institutional data protection policies.