Evidence map›Paper›PMID 40767144›Full record

Trial reportJournal of oral rehabilitation2025

Two Botulinum Toxin A Injections in Patients With Chronic Orofacial Myalgia: A Randomised, Double-Blind, Controlled Multicenter Trial With Nine-Month Follow-Up.

Christine Lennartsson, Ellie Saghafi, Behnosh Öhrnell Malekzadeh, Per Alstergren, Birgitta Johansson Cahlin

Abstract readRandomized Controlled TrialMulticenter Study
In one paragraph

Trial report in Journal of oral rehabilitation, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

  1. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Christine LennartssonClinic of Orofacial Pain, Mölndal, Public Dental Service, Region Västra Götaland, Sweden.ORCID https://orcid.org/0009-0005-0134-810X
Ellie SaghafiClinic of Orofacial Pain, Gothenburg, Public Dental Service, Region Västra Götaland, Sweden.ORCID https://orcid.org/0009-0001-9701-6249
Behnosh Öhrnell MalekzadehDepartment of Oral and Maxillofacial Surgery, Institute of Odontology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.ORCID https://orcid.org/0000-0001-7447-0580
Per AlstergrenDepartment of Orofacial Pain and Jaw Function, Faculty of Odontology, Malmö University, Malmö, Sweden.ORCID https://orcid.org/0000-0002-8539-7742
Birgitta Johansson CahlinDepartment of Orofacial Pain, Institute of Odontology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.ORCID https://orcid.org/0000-0002-1238-5644

Funding

Sahlgrenska AkademinVästra Götalandsregionen
6 · The paper itself

Abstract

backgroundConventional treatment for reducing pain is not always successful in patients with chronic orofacial myalgia.

objectiveThe objective of this study was to investigate the pain-reducing efficacy of two botulinum toxin A injections in patients with chronic orofacial myalgia who had already received conservative treatment.

methodsThe patients included were 18 years or older and diagnosed with myalgia according to the Diagnostic Criteria for Temporomandibular Disorders. Their pain had persisted for more than six months in spite of previous conservative treatment. The design was a randomised, double-blind, placebo-controlled, multicenter, parallel group study. Participants received two injections of botulinum toxin A or saline at an interval of three months. Follow-up visits were conducted at one, three, four, six and nine months after the first injection.

resultsSeventy-two patients were enrolled and sixty-nine completed the study. Between baseline and all follow-up visits, there was a significant decrease in VAS pain intensity for both groups, but the difference between groups was not significant.

conclusionThe use of botulinum toxin A in managing chronic orofacial myalgia did not offer any additional pain relief compared with saline at any of the follow-up occasions.

Indexed as

Botulinum Toxins, Type AChronic PainFacial PainMyalgiaNeuromuscular AgentsAdultAgedDouble-Blind MethodFemaleFollow-Up StudiesHumansInjections, IntramuscularMaleMiddle AgedPain MeasurementTemporomandibular Joint DisordersBotulinum Toxins, Type ANeuromuscular Agentsbotulinum toxinchronic painmyalgiaorofacial painrandomised controlled trialtemporomandibular disorders

Identifiers

PMID40767144
PMCPMC12624192

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.