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RecruitingNCT05604729Updated May 3, 2023

The Effect on Envelope of Motion in Asymptomatic Bruxers

An interventional study of Botulinum toxin type A and Placebo in Tooth Wear and Bruxism, sponsored by Region Västerbotten. Recruiting at 1 site in Sweden. Open to participants aged 25 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2023-05-03.

Sponsored by Region Västerbotten · Not applicable, Interventional, and Treatment

From the registry’s dates

  • Primary completion was expected by Dec 2024, 1 year 10 months ago, but the record still lists the study as recruiting.
Phase
Not applicable
Study type
Interventional
Enrollment
60
Allocation
Randomized
Ages
25 Years and older
Sex
All
01

Study summary

Investigating the effect of botulinum neurotoxin on the jaw-neck envelope of motion.

Read the detailed description

Research subjects will be allocated to placebo or botulinum neurotoxin intervention. A control group will not receive any intervention. The intervention will be administered at three separate sessions with 12 weeks in between. Prior to intervention, and 6 months after last intervention the jaw-neck envelope of motion will be studied using 3D optoelectronic recording systems.

02

Conditions studied

  • Tooth Wear
  • Bruxism

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03

In context

Tooth Wear

62 studies on the registry are indexed under Tooth Wear; 12 are open to participants now.

This study's planned enrollment of 60 is above the median of 49 across 41 interventional studies indexed under Tooth Wear.

Browse Tooth Wear studies →

Lead sponsor

Region Västerbotten is the lead sponsor of 15 studies on the registry; 7 are open to participants now.

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

04

Who can participate

Ages eligible
25 Years and older
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

  • Tooth wear into dentin.

Exclusion criteria

Exclusion Criteria:

  • No temporomandibular pathology.
  • No drugs affecting the central nervous system.
  • No conditions affecting muscles or central nervous system.
05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
60 participants (estimated)

Study arms

  • Experimental
    BoNT A (botulinum neurotoxin type A)

    Botulinum neurotoxin, 25 units (U) into each masseter at three sessions.

    Drug: Botulinum toxin type A

  • Placebo comparator
    Placebo

    Saline solution

    Drug: Placebo

  • Placebo comparator
    Control

    Saline solution, no tooth wear

    Drug: Placebo

Interventions

  • Botulinum Neurotoxin type A

    Also known as: Xeomin

  • DrugPlacebo

    Saline solution

    Also known as: Isotonic solution

06

What researchers measure

Primary outcomes

  1. Change of range of motion

    Measured on a cartesian plane in millimeters.

    Time frame: Baseline and 6 months after last intervention. Measurements compared to baseline values.

  2. Change of envelope of motion

    Volume of envelope of motion measured in cubic millimeters.

    Time frame: Baseline and 6 months after last intervention. Measurements compared to baseline values.

  3. Change of length in chewing cycles

    Repetitive chewing cycles, measured in milliseconds.

    Time frame: Baseline and 6 months after last intervention. Measurements compared to baseline values.

Secondary outcomes

  1. Change of muscle thickness

    Masseter muscle thickness measured through ultrasonography

    Time frame: Baseline and 6 months, 1 year and 2 years after last intervention. Measurements compared to baseline values.

  2. Change of maximal voluntary bite force

    Measured through a strain gauge meter

    Time frame: Baseline and 6 months, 1 year and 2 years after last intervention. Measurements compared to baseline values.

  3. Tooth wear, change of hard tissue mass

    Intraoral scanning. Tooth wear measured in cubic millimeters.

    Time frame: Baseline and 6 months, 1 year and 2 years after last intervention. Measurements compared to baseline values.

07

Study locations

1 of 1 sites recruiting
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on May 3, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05604729
Lead sponsor
Region Västerbotten
Collaborators
Umeå University
Responsible party
Sponsor
First posted
Nov 3, 2022
Start date
Sep 1, 2023 (estimated)
Primary completion
Dec 31, 2024 (estimated)
Completion
Dec 31, 2025 (estimated)
Last update
May 3, 2023

Study contacts

Martin Ågren, MScDS
Contact
martin.agren@umu.se
+46907850000
Mattias Pettersson, PhD
principal investigator · Umeå University

Oversight

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

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Studies of the drug tested here: Botulinum toxin type A

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