microstomia
Pronunciation: my-crow-STOW-me-ah
Abnormally small mouth opening, often requiring surgical correction for functional and aesthetic improvement.
Full Definition
Microstomia is a condition characterized by an abnormally small mouth opening (oral aperture) that can be congenital or acquired. Congenital microstomia may result from developmental anomalies, while acquired forms can occur following burns, trauma, or scar contracture from previous surgeries. The condition can significantly impact functions such as eating, speech, dental hygiene, and intubation for medical procedures. Surgical treatment typically involves commissuroplasty procedures to widen the oral aperture, which may include Z-plasty techniques, local tissue rearrangement, or release of scar contractures. The goal is to achieve adequate mouth opening while maintaining competent lip closure and acceptable aesthetic outcomes.
Usage
Usage note: Opposite of macrostomia; be careful not to confuse with trismus, which is limited mouth opening due to muscle spasm.
In Context
- "The patient's severe microstomia following burn injury required staged commissuroplasty procedures." — reconstructive surgery planning
- "Preoperative assessment of microstomia included measurement of interincisal distance and lip competence evaluation." — clinical examination notes