Floor Of Oral Cavity Muscles

The floor of mouth is an oral cavity subsite and is a common location of oral cavity squamous cell carcinoma. The floor of mouth is a u shaped space which extends and includes from the oral cavity mucosa superiorly and the mylohyoid muscle sling 2 3. These include the hard palate floor of the mouth buccal mucosa including the upper and lower gingivobuccal sulci retromolar trigone and anterior two thirds or oral portion of the tongue and lips figs.

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For purposes of surgical planning the floor of the mouth is defined as the space between the mucosal surface and the mylohyoid muscle sling and comprising both structures 1.

Floor of oral cavity muscles.

Several submandibular and sublingual salivary glands secrete viscous and mucoid fluid to lubricate and keep the oral cavity moist. The floor is formed by the mylohyoid muscles and is occupied mainly by the tongue. The floor of the mouth is a small horseshoe shaped region situated beneath the movable part of the tongue and above the muscular diaphragm formed by the mylohyoid muscles and above this diaphragm is the genohyoid muscle. The floor of the oral cavity consists of several structures.

190 2 190 5 and 196 1. The floor of the mouth is a horizontally aligned u shaped space situated in the part of the oral cavity that lies beneath the tongue. This region is divided into right and left halves by the lingual frenulum and contains the ostia of the submandibular and sublingual salivary glands. Inferiorly it has various oral muscles glands tongue attachment to the oral cavity floor 7 through the flexible band of tissues known as lingual frenulum 21.

A mucous membrane the oral mucosa lines the sides and under surface of the tongue to the gums lining the inner aspect of the jaw mandible. The oral cavity encompasses several relatively discrete regions. Geniohyoid muscles pull the larynx forward during swallowing. Muscular diaphragm comprised of the bilateral mylohyoid muscles.

It is bounded by a roof a floor and lateral walls. A mucous membrane known as the oral mucosa is composed of stratified squamous epithelium and forms the inner lining of the mouth. The oral cavity proper is also surrounded by mucus membrane continuing from the vestibular walls 10. The mylohyoid muscles constitute the floor of the oral cavity proper.

The mylohyoid genioglossus and geniohyoid muscles comprise the muscular floor of the oral cavity. The oral cavity is situated anteriorly on the face under the nasal cavities. It provides structural support to the floor of the mouth and pulls the larynx forward during swallowing.

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