Case report reveals masticatory muscle tendon–aponeurosis hyperplasia causing severe skeletal relapse in a 36-year-old male, highlighting surgical release as an effective intervention.
Background Masticatory muscle tendon–aponeurosis hyperplasia (MMTAH) is a condition in which the tendons and fascia of the masticatory muscles, including the masseter muscle, overgrow. Case presentation A 36‐year‐old male underwent orthognathic surgery to correct malocclusion with mandibular protrusion. A strong skeletal relapse was observed immediately after surgery. The patient was clinically diagnosed with MMTAH after examination. He opened his mouth up to 46 mm after coronoidectomy and masseter muscle tendonectomy surgery. Conclusion Based on the available previous reports, this is the first report of MMTAH resulting from strong skeletal relapse after orthognathic surgery.
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Nakao et al. (2024) studied this question.
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