The fornix of the oral cavity or forenix vestibulioris is a continuous interwoven complex of fibers that connects the mucous membrane of the cheeks, upper and lower lips before exiting into the oral cavity. It is part of the inside of the cheek (edentulous area), which is a delicate fibrous lip surrounding the space for teeth and the space for nerve entry.
The formation of the vestibule is a complex multi-step process determined by several genetic and environmental factors. The main steps in the formation of this organ are the determination of fold patterns, development in the first period of placental development, and modification under the influence of environmental factors such as steroids.
The vestibular arch is a complex structure that performs many functions. One of the main functions is to protect newborns during feeding. It prevents large amounts of food from entering the nasopharynx during breastfeeding. It also plays an important role in the regulation of homeostasis, as it can respond to certain environmental conditions and regulate the temperature and humidity in the baby's mouth.
In addition, the vault of the oral vestibule can be used to diagnose various conditions of the oral cavity. Its swelling or changes in structure may indicate the presence of an inflammatory process, injury or infection in the mouth. In addition, with certain diseases, changes in the structure and function of the fornix may prompt the patient to see a specialist before more serious symptoms appear. For example, some conditions, such as Pazelka syndrome, can be diagnosed this way.
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