ClinicalTrials.gg
CompletedNCT03456154Updated May 20, 2021

Botox vs Occlusal Splint for Masseter Pain

A Phase 4 interventional study of Botox Injectable Product and Occlusal splint in Pain, Face, sponsored by Federal University of Pelotas. Completed at 1 site in Brazil. Open to participants aged 18 Years to 70 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2021-05-20.

Sponsored by Federal University of Pelotas · Phase 4, Interventional, and Treatment

Phase
Phase 4
Study type
Interventional
Enrollment
60
Allocation
Randomized
Ages
18 Years to 70 Years
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 14 studies in Facial Pain with a site in Brazil — 2 open to participants now, 2 under way, none of them phase 3. Facial Pain · Brazil.

Enrollment
5th of 13
60 · median 45
Started
2018
the only one that year
Phase 4
Only one
of the 14
Registered
11th of 14
by date
Lead sponsor
1 of 14
Federal University of Pelotas

Among the 14 studies in Facial Pain with a site in Brazil, this one is the 5th largest by enrollment of the 13 interventional ones that give a count, is the only one that started in 2018, is the only one in phase 4, and was the 11th registered.

Facial Pain

182 studies on the registry are indexed under Facial Pain; 61 are open to participants now.

Browse Facial Pain studies →

Open to participants now

2 of the 14 studies in Facial Pain with a site in Brazil are open now. Recruiting first, the newest first:

All 2 open studies →

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

Who these studies take

Of the 30 Facial Pain studies recruiting now, 16 (53%) set no upper age limit and 10 (33%) stop at 75 or younger; 5 take children under 18; 10 take healthy volunteers.

This study: 18 Years to 70 Years · all sexes · healthy volunteers too.

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02

Study summary

This randomized clinical trial will compare the standard treatment (occlusal splint) and botox for the treatment of face muscular pain in adults. Fifty patients will be invited and selected, and allocated to the experimental group, according to the randomization sequence previously performed. For the splint group, a rigid splint will be worn by the patient every night. For the botox group, 60u of botox will be injected in 3 regions of the masseter muscle. Patients will be assessed before the experiment, 3 and 6 months after the beginning of the study. Oral health related quality of life, pain, and cervical neck position will be evaluated. Paired t-test and chi-square will be used for statistical analysis.

03

Conditions studied

  • Pain, Face

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04

Who can participate

Ages eligible
18 Years to 70 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

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

  • Between 18 and 70 years old;
  • at least 20 teeth in the mouth;
  • occlusal stability;
  • presenting pain in face muscles.

Exclusion criteria

Exclusion Criteria:

  • Angle's Class III
  • Kennedy's Class II or I removable partial denture wearer;
  • Complete denture wearer;
  • Individuals that have taken any anti inflammatory drugs in the last 3 months;
  • Individuals with temporomandibular joint disorders.
05

Study design

Phase
Phase 4
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Outcomes assessor)
Enrollment
60 participants (actual)

Study arms

  • Experimental
    Botox

    In this group patients will receive 3 injections of botox on each masseter (left and right), after randomization. This injection will be performed once, and the patient will be evaluated after 3 and 6 months after this day.

    Drug: Botox Injectable Product

  • Active comparator
    Occlusal splint

    In this group patients will receive an occlusal splint, which will be manufactured after taking their full mouth impression. This appliance has to be worn everyday, for 6 months, at night.

    Device: Occlusal splint

Interventions

  • 60u will be used at 3 sites of masseter muscle, on each side of the face

  • DeviceOcclusal splint

    In this group patients will receive an occlusal splint which will be worn everyday for 6 months at night.

06

What researchers measure

Primary outcomes

  1. Masticatory muscle pain

    VAS will be used to assess decrease of pain

    Time frame: baseline, 3 and 6 months

Secondary outcomes

  1. Oral health related quality of life

    OHIP 14 questionnaire will be applied

    Time frame: baseline, 3 and 6 months

  2. Cervical Position

    Modifications of cervical vertebral column position will be assessed

    Time frame: baseline, 3 and 6 months

07

Study locations

1 site
  • Federal University of Pelotas
    Pelotas, Rio Grande Do Sul 96015560, Brazil
08

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Ran from Mar 2018 to primary completion in Jan 2021, 34 months.

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

Registered
Feb 28, 2018
First posted
Mar 7, 2018
StartActual
Mar 15, 2018
Primary completionActual
Jan 15, 2021
CompletionActual
Mar 1, 2021
Last update
May 20, 2021
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 May 20, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT03456154
Lead sponsor
Federal University of Pelotas
Responsible party
Maximiliano Sergio Cenci (PhD, Federal University of Pelotas) — Principal investigator
First posted
Mar 7, 2018
Start date
Mar 15, 2018
Primary completion
Jan 15, 2021
Completion
Mar 1, 2021
Last update
May 20, 2021

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 completed, as verified in May 2021. You cannot join it, but the record below documents what was studied.

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