Coronoid Ankylosis: Case Report
There are also different types of ‘‘false’’ ankylosis, other pathological mechanisms leading to inhibition of opening the mouth, such as the fusion of the coronoid process with the temporal bone or with the zygoma (Rottke and Dunker, 1967; Schwartz and Kagan, 1979).
Ankylosis of the zygomatic bone to the coronoid process of the mandible is a rare reported sequel to trauma and infection in that region. In the present abstract, one case is reported of ankylosis resulting from a previous trauma that was surgically treated.
Case Report
A 11 years old female was referred to our department in january 2014 with a history of previous facial trauma.
On the physical examination, it was observed an asymmetry and limited opening of the mouth which was less than 1mm.The bony mass was palpated in the preauricular region, indicating that there had been excessive growth of the zygomatic arch bone .Thus on CT scan it was observed an irregular bony outgrowth. And three dimensional (3D) reconstruction showed a mushroom-shaped bony outgrowth from the coronoid process to the inner surface of the zygomatic arch.
The patient was surgically treated under general anesthesia, a nasal fiber optic intubation with the child awake and under local anesthesia was performed first and an intraoral approach was done. After exposure and identification of the site of ankylosis, aggressive excision of the fibrous and/or bony mass was carried out. After the mass was surgically removed the mouth opening increased. The patient was discharged after 72h.
Aggressive physical treatment was given to improve function.