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Not yet recruitingNCT07736521RCTUpdated Jul 30, 2026

Arthrocentesis Versus Botulinum Toxin Injection in Patients With Temporomandibular Joint Disorders: A Randomized Controlled Trial

An interventional study of Arthrocentesis and Botulinum Toxin-A in Temporomandibular Joint Disorders, Temporomandibular Joint Dysfunction Syndrome and Facial Pain, sponsored by Mudher MB Alsunbuli. Not yet recruiting. Open to participants aged 18 Years to 64 Years. Per ClinicalTrials.gov, last updated 2026-07-30.

Sponsored by Mudher MB Alsunbuli · Not applicable, Interventional, and Treatment

Phase
Not applicable
Study type
Interventional
Enrollment
66
Allocation
Randomized
Ages
18 Years to 64 Years
Sex
All
01

Study summary

The goal of this clinical trial is to learn if arthrocentesis works as well as botulinum toxin (Botox) injection to treat pain and jaw dysfunction in adults with temporomandibular joint (TMJ) disorders.

The main questions it aims to answer are:

  • Does arthrocentesis reduce pain more, less, or the same as Botox injection?
  • Does arthrocentesis improve jaw opening and function more, less, or the same as Botox injection?
  • What side effects do participants have with each treatment?

Researchers will compare arthrocentesis to Botox injection to see which treatment works better for reducing pain and improving jaw movement in patients with TMJ disorders.

Participants will:

  • Be randomly assigned to receive either arthrocentesis (a joint-washing procedure) or a Botox injection into the jaw muscles
  • Visit the clinic at 1, 3, and 6 months after treatment for checkups and assessments - Rate their pain and have their jaw movement measured at each visit
  • Complete short questionnaires about their jaw function and quality of life
02

Conditions studied

  • Temporomandibular Joint Disorders
  • Temporomandibular Joint Dysfunction Syndrome
  • Facial Pain

Keywords

  • Temporomandibular Joint Disorders
  • Arthrocentesis
  • Botulinum Toxin
  • TMJ Pain
  • Randomized Controlled Trial
  • Botox
  • Maximum Mouth Opening
  • Visual Analog Scale
03

In context

Temporomandibular Joint Disorders

609 studies on the registry are indexed under Temporomandibular Joint Disorders; 160 are open to participants now.

This study's planned enrollment of 66 is above the median of 46 across 434 interventional studies indexed under Temporomandibular Joint Disorders.

Browse Temporomandibular Joint Disorders studies →

Lead sponsor

This is the only study on the registry with Mudher MB Alsunbuli as lead sponsor.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 64 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Clinically and radiographically confirmed temporomandibular joint (TMJ) disorder, diagnosed according to Wilkes staging or the Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD)
  • Age 18 years or older
  • Symptom duration of at least 3 months
  • Unresponsive to conservative therapy
  • Willing and able to provide written informed consent

Exclusion criteria

Exclusion Criteria:

  • Previous TMJ surgery
  • Systemic rheumatic/inflammatory joint disease (e.g., rheumatoid arthritis, ankylosing spondylitis)
  • Bony ankylosis of the TMJ
  • Pregnancy
  • Known allergy or contraindication to botulinum toxin
  • Concurrent use of muscle relaxants, corticosteroids, or anticoagulant medication that may confound treatment effects
  • Unwillingness or inability to attend scheduled follow-up visits
05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Outcomes assessor)
Enrollment
66 participants (estimated)

Study arms

  • Experimental
    Arthrocentesis

    Participants will undergo temporomandibular joint arthrocentesis, a minimally invasive joint lavage procedure.

    Procedure: Arthrocentesis

  • Active comparator
    Botulinum Toxin Injection

    Participants will receive an intramuscular injection of botulinum toxin (Botox) into the masticatory muscles (masseter and temporalis)

    Drug: Botulinum Toxin-A

Interventions

  • ProcedureArthrocentesis

    Temporomandibular joint (TMJ) arthrocentesis will be performed under local anesthesia using a standard two-needle technique. Two needles will be inserted into the superior joint space, and the joint will be irrigated with sterile isotonic solution (e.g., Ringer's lactate or normal saline, approximately 100-300 mL) to lavage inflammatory mediators and break minor intra-articular adhesions. The procedure will be performed as a single session by a trained oral and maxillofacial surgeon. Patients will be advised to follow a soft diet and may receive standard analgesics as needed following the procedure.

    Also known as: lavage

  • DrugBotulinum Toxin-A

    Botulinum toxin type A (Botox) will be injected intramuscularly into the masseter and temporalis muscles bilaterally. Injection sites will be determined by palpation of muscle bulk and activity during voluntary contraction (patients will be asked to clench their teeth to identify the muscle borders and the point of maximal bulk/tenderness). The total dose will be 25-50 units per masseter muscle and 10-25 units per temporalis muscle, administered as a single session. The procedure will be performed by a trained physician experienced in botulinum toxin injection technique. Patients will be monitored for the onset of muscle relaxation effects, expected within days to weeks following injection.

06

What researchers measure

Primary outcomes

  1. Change in Pain Intensity Measured by Visual Analog Scale (VAS)

    Pain intensity in the temporomandibular joint region will be measured using a Visual Analog Scale (VAS), a 0-10 point continuous scale where 0 indicates no pain and 10 indicates the worst pain imaginable. Participants will rate their pain at rest and during jaw movement/chewing at each study visit. The change in VAS score from baseline to 6 months will be compared between the arthrocentesis and botulinum toxin injection groups.

    Time frame: Baseline, 1 month, 3 months, and 6 months post-treatment

07

Study locations

No study locations are listed for this record.

08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jul 30, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT07736521
Lead sponsor
Mudher MB Alsunbuli
Collaborators
Al-Bayan University
Responsible party
Mudher MB Alsunbuli (Assistant Professor Dr., Al-Bayan University) — Sponsor-investigator
First posted
Jul 30, 2026
Start date
Aug 15, 2026 (estimated)
Primary completion
Nov 15, 2026 (estimated)
Completion
May 1, 2027 (estimated)
Last update
Jul 30, 2026

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is not yet recruiting, as verified in Jul 2026. You cannot join it, but the record below documents what was studied.

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