The Structure Of Oral Care

Lips and cheeks

Oral lips constitute the front wall of the oral cavity and are divided into upper and lower lips. The crack between the two lips is called a crack, and the joint on both sides is called the corner of the mouth. There is a longitudinal shallow groove on the outer midline of the upper lip called the human middle, which is a unique structure of human beings. The coma patients often undergo acupuncture or acupressure stimulation here during first aid to prompt the patient to wake up.

The cheeks constitute the two side walls of the oral cavity, and the shallow groove between the cheeks and the upper lip is the nasolabial fold.

Palate

The palate constitutes the roof of the proper oral cavity. The first 2/3 of the hard palate is mainly composed of bone palate and covered with mucosa. The back of the soft palate descends obliquely backward, called the palatine velum. The posterior edge of the palatal sail is free, and there is a downward protrusion in the center called uvula. On both sides of the palate, there are two pairs of mucosal folds connected to the base of the tongue and the side wall of the pharynx, a symmetrical palatoglossal arch in the front, and a palatopharyngeal arch in the back. The fossa between the two arches is called the tonsillar fossa, which contains the palatine tonsils. The palate, the palatoglossal arches on both sides and the base of the tongue together form the pharyngeal isthmus (isthmus 0f fau-ces), which is the dividing line between the oral cavity and the pharynx.

tongue

The tongue is located at the bottom of the mouth. It is a muscular organ that has the functions of sensing taste, assisting in chewing and swallowing food, and assisting in pronunciation.

tooth

Teeth are embedded in the alveolar of the upper and lower jaws, and are arranged in the upper and lower arches respectively.

Oral gland

Salivary dand is a general term for various glands that open in the oral cavity. Oral glands are divided into large and small types, which can secrete saliva. The minor salivary glands include labial glands and buccal glands. Major salivary glands include three pairs of parotid gland, submandibular gland and sublingual gland.

The parotid gland is the largest of the three pairs of salivary glands, which is slightly triangular and wedge-shaped as a whole, located in front of and below the external auditory meatus. The parotid duct (parotid duct) originates from the front edge of the parotid gland, crosses the masseter muscle surface at the transverse finger under the zygomatic arch, and finally passes through the buccal muscle, opening on the buccal mucosa opposite the crown of the maxillary second molar.

The submandibular gland (submandibular gland) is located in the deep surface of the mandibular body, slightly oval in shape, and the gland tube opens in the sublingual caruncle.

The sublingual gland (sublingual gland) is located in the deep surface of the sublingual fold, and the gland duct opens in the sublingual caruncle and sublingual fold.