Abstract
Trismus is a disturbing condition with varied etiology, one of them is Extra articular ankylosis. The extra articular ankylosis has been reported in the literature as a fusion of the coronoid process to the zygomatic bone or to the skull base. However, there are a very few cases reported in the literature that highlights a pathologic tumor of mandible leading to extra-articular ankylosis and subsequently resulting in trismus. We hereby present a unique case of young adult having restricted mouth opening due to the bony fusion of the mandibular ramus to the zygomatic bone and zygomaticomaxillary buttress region due to a pathologic tumor diagnosed as Ossifying Fibroma.
Highlights
Trismus is a disturbing and debilitating condition for the patients as it affects the function of mastication that subsequently results in malnutrition
The extra articular or the False Ankylosis has been reported in the literature as a fusion of the coronoid process to the zygomatic bone or to the skull base [1]
The most common etiology of the False ankylosis reported is due to trauma causing fracture of the Zygomatico Maxillary Complex (ZMC) and coronoid process which were undiagnosed and untreated [2]
Summary
Trismus is a disturbing and debilitating condition for the patients as it affects the function of mastication that subsequently results in malnutrition. There is hardly any case of bony tumor of Ramus and Angle region of mandible reported which results in reduction of mouth opening due to fusion with the zygomatic bone. We hereby present a rare case entity of young adult having restricted mouth opening due to the bony fusion of the mandibular ramus to the zygomatic bone and zygomatico buttress region due to a pathologic tumor. This kind of condition is unique and hardly reported. Extra Articular False Ankylosis Following Fusion of Mandible to Zygomatic Bone and Maxilla Due to Ossifying Fibroma-A Rare Case Report.
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