micrognathia
Pronunciation: my-crog-NAY-thee-ah
Underdevelopment of the jaw, particularly the mandible, often occurring in juvenile idiopathic arthritis affecting the temporomandibular joints.
Full Definition
Micrognathia refers to an abnormally small jaw, most commonly affecting the mandible (lower jaw). In pediatric rheumatology, micrognathia is a concerning complication of temporomandibular joint involvement in juvenile idiopathic arthritis. Chronic inflammation of the TMJ can damage the mandibular growth centers, leading to asymmetric or bilateral jaw underdevelopment. This condition may result in dental malocclusion, difficulty chewing, speech problems, and cosmetic concerns. Early recognition through clinical examination and imaging is crucial, as prompt treatment with intra-articular corticosteroids, systemic therapy, or orthodontic intervention may prevent or minimize long-term deformity.
Usage
Usage note: Often associated with TMJ arthritis; distinguish from other facial growth abnormalities.
In Context
- "Progressive micrognathia was noted in the patient with long-standing temporomandibular joint arthritis." — Orthodontic referral note
- "Early recognition and treatment of TMJ involvement prevented significant micrognathia development." — Preventive care documentation