Oromandibular Dystonia Resistant to Botulinum Toxin: Two Case Studies Highlighting Condylar Dislocation as a Structural Mimicker
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By
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Olcay Şakar
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Berk Bilgen
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Bora Edim Akalın
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Kazuya Yoshida
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July 20, 2026
Clinical Scorecard: Oromandibular Dystonia Resistant to Botulinum Toxin: Two Case Studies Highlighting Condylar Dislocation as a Structural Mimicker
At a Glance
| Category | Detail |
|---|
| Condition | Oromandibular Dystonia (OMD) |
| Key Mechanisms | Involves abnormal muscle contractions affecting masticatory and facial muscles; can be mimicked by structural disorders like condylar dislocation. |
| Target Population | Patients with suspected OMD and non-responsive to botulinum toxin therapy. |
| Care Setting | Neurology and oral/maxillofacial evaluation. |
Key Highlights
- Botulinum toxin is a standard treatment for OMD but may not be effective in all cases.
- Long-standing condylar dislocation can mimic OMD symptoms.
- Non-response to botulinum toxin should trigger reassessment of diagnosis.
- Structural evaluation is crucial in cases of fixed mandibular deviation.
- Both cases improved after structural correction and prosthetic rehabilitation.
Guideline-Based Recommendations
Diagnosis
- Consider structural disorders in patients with OMD-like symptoms and non-response to treatment.
- Use dental imaging and oral/maxillofacial consultation for accurate diagnosis.
Management
- Botulinum toxin injections should be reconsidered if there is no meaningful benefit.
- Structural correction may be necessary for conditions like long-standing condylar dislocation.
Monitoring & Follow-up
- Monitor for signs of structural disorders in patients with OMD symptoms.
Risks
- Misdiagnosis of structural disorders as OMD may lead to ineffective treatment.
Patient & Prescribing Data
Patients with oromandibular dystonia symptoms.
Botulinum toxin therapy may not address underlying structural issues.
Clinical Best Practices
- Reassess diagnosis in patients with OMD who do not respond to botulinum toxin.
- Incorporate dental imaging in the evaluation of suspected OMD cases.
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