ClinicalTrials.gg
RecruitingNCT06941636Updated Apr 24, 2025

Botulinumtoxin A as a Treatment for Myalgia and Myofacial Pain in Patient With Temporomandibulardisorders

A Phase 3 interventional study of 5U/0,1 ml Botulinum toxin A and 10U/0,1 ml Botulinum toxin A in Temporomandibular Disorder, sponsored by Region Stockholm. Recruiting at 1 site in Sweden. Open to female participants aged 18 Years to 50 Years. Per ClinicalTrials.gov, last updated 2025-04-24.

Sponsored by Region Stockholm · Phase 3, Interventional, and Other

Help build ClinicalTrials.gg — short surveys, remote interviews or testing, in your language. Take part →

Phase
Phase 3
Study type
Interventional
Enrollment
90
Allocation
Randomized
Ages
18 Years to 50 Years
Sex
Female
01

Where this study stands

Counted across the records on this site · 2026-11-13

Among 11 studies in Temporomandibular Joint Disorders with a site in Sweden — 7 open to participants now, 7 under way, 1 of them phase 3. Temporomandibular Joint Disorders · Sweden.

Started
2025
with 3 others
Phase 3
Only one
of the 11
Registered
7th of 11
by date
Lead sponsor
1 of 11
Region Stockholm

Among the 11 studies in Temporomandibular Joint Disorders with a site in Sweden, this one is one of 4 that started in 2025, is the only one in phase 3, and was the 7th registered.

Temporomandibular Joint Disorders

591 studies on the registry are indexed under Temporomandibular Joint Disorders; 149 are open to participants now.

Browse Temporomandibular Joint Disorders studies →

Open to participants now

7 of the 11 studies in Temporomandibular Joint Disorders with a site in Sweden are open now. Recruiting first, the newest first:

1 more — sign in →

All 7 open studies →

A study can be open while its sites in Sweden have not opened yet or have stopped. Only those recruiting at a site in Sweden →

Who these studies take

Of the 75 Temporomandibular Joint Disorders studies recruiting now, 26 (35%) set no upper age limit and 45 (60%) stop at 75 or younger; 7 take children under 18; 23 take healthy volunteers.

This study: 18 Years to 50 Years · female · no healthy volunteers.

The full table on the hub →

This tab as a report to print or save as PDF → With an account.

Was this useful?
Watch this landscapeDownload CSVNarrow it in search →With an account: a weekly mail of what changed among 11 studies in Temporomandibular Joint Disorders with a site in Sweden, or all of them as a file.
02

Study summary

Both patients and remitters ask for treatment with Botulinumtoxin A (BTX) with the hope that it will be an effective aid for pain, but little is known regarding if the effect is dose dependent.

The aim of this project is to investigate if injections with BTX in the masseter- and temporal muscle is an efficient treatment in patient with myogenous temporomandibular disorders (TMD) and if the effect of BTX is dose dependent.

Read the detailed description

The primary goal with this study is to expand treatment modalities for patient with myogenous TMD, and to develop clinical protocols with adequate doses for myogenous TMD. A secondary goal is to study if there are differences in treatment effect between sub-groups of myogenous TMD for more personalised pain-treatment.

Hypothesis The investigators hypothesis is that application of BTX into the masseter and temporalis muscle will reduce pain and increase quality of life in patients with myogenous TMD, and that the reduction of pain is only to a certain degree due to the dose. High doses of BTX does not necessarily entail increased reduction of pain or better quality of life. The investigators also hypotheses that the effect may differ in sub-groups of myogenous TMD.

03

Conditions studied

  • Temporomandibular Disorder
04

Who can participate

Ages eligible
18 Years to 50 Years
Sexes eligible
Female
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Has given a written consent
  • Diagnose of myalgia, myofacial pain or myofascial pain with referred pain according
  • Average pain due to NRS ≥ 3 for more than three months
  • Palpationpain in masseter or temporalis.
  • Eventual treatment for orofacial pain > three months ago.
  • Adequate and a negative pregnancy test.

Patients will still be included even if they have one or more co-diagnoses

  • Discdisplacement with or without reduction
  • Degenerative joint disease
  • Arthralgia

Exclusion criteria

Exclusion Criteria:

  • Treatment with BTX during the last 12 months
  • Treatment for orofacial pain within the last 3 months.
  • Systemic inflammatory diseases (rheumatoid arthritis, psoriatic arthritis, ankylosing spondylitis)
  • Widespread pain e.g., fibromyalgia
  • Neuropathic pain
  • Neurologic disease (myasthenia gravis)
  • Pain of dental origin
  • Use of muscle relaxants, or aminoglycoside antibiotics
  • Pregnancy or nursing
  • to BTX
  • Neuropsychiatric conditions.
  • Difficulties understanding the Swedish language
Terms in these criteria, in plain language(2)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

Hypersensitivity

An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.

05

Study design

Phase
Phase 3
Primary purpose
Other
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Care provider)
Enrollment
90 participants (estimated)

Study arms

  • Active comparator
    BTX-L for myogenous TMD

    Patients (n=45) with myogenious TMD will receive treatment with 50 U of Botox®100 U, AbbVie. The drug will be dissolved in 2 millilitres of room-temperate sterile isotonic saline. This gives 5U/0,1 ml solution and each patient will receive a total o 50 U as described in the protocol

    Drug: 5U/0,1 ml Botulinum toxin A

  • Active comparator
    BTX-H for myogenous TMD

    Patients (n=45) with myogenious TMD will receive treatment with 100 U of Botox®100 U, AbbVie. The drug will be dissolved in 1 millilitre of room-temperate sterile isotonic saline. This gives 10U/0,1 ml solution and each patient will receive a total of 100 U as described in the protocol

    Drug: 10U/0,1 ml Botulinum toxin A

Interventions

  • Drug5U/0,1 ml Botulinum toxin A

    Botox® 100 U (AbbVie) will be dissolved in 2 milliliters of room-temperature sterile isotonic saline, resulting in a solution concentration of 5 U/0.1 mL. Each patient will receive a total dose of 50 U, administered bilaterally into the masseter and temporalis muscles.

    Also known as: Botox®100 U, AbbVie

  • Drug10U/0,1 ml Botulinum toxin A

    Botox® 100 U (AbbVie) will be dissolved in 1 milliliters of room-temperature sterile isotonic saline, resulting in a solution concentration of 10 U/0.1 mL. Each patient will receive a total dose of 100 U, administered bilaterally into the masseter and temporalis muscles.

    Also known as: Botox®100 U, AbbVie

06

What researchers measure

Primary outcomes

  1. Changes in pain and impact of doses on pain relief

    Pain level will be assessed using the Numeric rating Scale (NRS, a scale ranging from 0 (no pain) to 10 (worst pain imaginable). A 30% reduction in pain according to the NRS is considered a significant effect. The study compare two doses (low and high)

    Time frame: Six months

Secondary outcomes

  1. Changes in quality of life according to The Oral Healthy Impact profile questionnaire (OHIP-5)

    The influence of the quality of life will be measured. Scores are categorized as follow: No influence (0-7 p), some influence (8-15 p) and large influence (16-20 p). Higher score mean worse outcomes

    Time frame: 6 months

  2. Maximum jaw opening in millimeter, with and without pain will be compared to asess treatment outcomes.

    Treatment outcome in sub-groups of myogenous TMD.

    Time frame: 6 months

  3. Changes i pressure pain threshold (PPT)

    Sensitivity to pressure induced pain by PPT (pressure pain threshold). PPT will be measured three times and average value will be used.

    Time frame: 6 months

  4. Changes in psychological factors

    According to changes in Axis II (a psykometric form)

    Time frame: 6 months

07

Study locations

1 of 1 sites recruiting
  • Eastman institute Folktandvården Region Stockholm
    Stockholm, 11324, Sweden
    Recruiting
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Start is estimated for May 2025; primary completion for Dec 2026, 19 months later.

How these figures are worked out, and which studies are left out of them.

Registered
Jun 4, 2024
First posted
Apr 24, 2025
StartEst.
May 1, 2025
Primary completionEst.
Dec 1, 2026
CompletionEst.
Dec 1, 2026
Last update
Apr 24, 2025
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Apr 24, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06941636
Lead sponsor
Region Stockholm
Responsible party
Sponsor
First posted
Apr 24, 2025
Start date
May 1, 2025 (estimated)
Primary completion
Dec 1, 2026 (estimated)
Completion
Dec 1, 2026 (estimated)
Last update
Apr 24, 2025

Study contacts

Veronica de Flon
Contact
veronica.deflon@regionstockholm.se
+ 46 702182623
Veronica de Flon
principal investigator · Region Stockholm

Oversight

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

Interested in this study?

Eligibility is decided by the study team. Share this record with your doctor or contact the team directly.

Contact study team

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Start the discussion