The oral cavity 0 Consists of the lips

The oral cavity 0 Consists of the lips, cheeks, tongue, teeth and salivary glands 0 Oral cavity is bounded by the lips anteriorly and the cheeks laterally. 0 The roof is formed by the palate 0 The mouth communicates with the oropharynx posteriorly through the oropharyngeal isthmus 9/25/2020 1

0 Lips- lower and upper closes the oral cavity anteriorly. 0 Externally is covered with skin that contains hair follicles, sebaceous glands, and sweat glands. 0 Internally is covered with mucous membrane 0 In between the linings the lips consists of striated muscle fibers and fibroelastic connective tissue. 9/25/2020 4

0 Cheek – also has outer covering of skin and inner lining of mucous membrane. 0 In between the two there is fat tissue and skeletal muscles 9/25/2020 5

0 The palate –there are two types the hard and soft palate. 0 The hard palate has mucous membranes that covers both surfaces of bony skeleton and is firmly attached to it by thin layer of dense connective tissue. 0 The mucous membrane is not mobile 9/25/2020 6

0 Soft palate consists of central skeleton of dense fibrous tissue (palatine aponeurosis) of which on both sides are present skeletal muscles 0 Muscles are covered by mucous membrane 0 Has two surface oral and nasal 9/25/2020 7

THE TOOTH 0 Tooth – is a hard tissue that fits into sockets of the alveolar processes of the mandible and the maxillar 0 Lower jaw is formed by the mandible and the upper jaw is formed by the maxillar 0 The maxillar has no mobility unlike mandible which is movable because it forms a synovial joint with temporal bone of the skull 9/25/2020 8

0 The crown is the part of the tooth that is visible in the oral cavity 0 The root is embedded in the alveolar bone of the jaws and is held by periodontal ligament and gums 0 Neck joins the crown and the root 9/25/2020 10

0 The tooth has hard tissues and soft tissues 0 Three hard tissues - enamel, dentine and cementum 0 Three soft tissues - dental pulp, periodontal ligament and gingiva (or gums) 9/25/2020 11

The tongue 0 Is the mobile muscular structure located in the oral cavity proper. 0 It consists of central core of intrinsic skeletal muscle covered with mucous membrane 0 The tongue consists of : -body - anterior two thirds -root - posterior one third 0 The borderline between the two is identified by a V-shaped groove or furrow known as, sulcus terminalis, with the apex directed posteriorly 9/25/2020 13

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Posterior third of the tongue 0 The root of the tongue is held in place by extrinsic muscles that arise from nearby bones and insert in the tongue 0 Also the root of the tongue consists of intrinsic muscles that arises and insert into the substance of the tongue and have no external bony attachment 9/25/2020 15

0 In between the muscle fibers there are fibroelastic tissue, blood vessels, nerves, adipose tissue and glands. 0 Glands are mainly mucus at the base, serous in the body and mixed near the tip of the tongue 9/25/2020 16

Anterior part of the tongue 0 The anterior two third forms the body of the tongue 0 Is the most mobile part of the tongue 0 It contains intrinsic and extrinsic muscles; intrinsic muscles are arranged in different directions 9/25/2020 17

Lingual papillae 0 There are four 0 Filiform papillae 0 Fungiform papillae 0 Circumvallate papillae 0 Folliate papillae 9/25/2020 18

SALIVARY GLANDS 0 Parotid 0 Submandibular 0 sublingual 9/25/2020 19

PAROTID GLAND SWELLING

PAROTID GLAND SWELLING

SUBMANDIBULAR GLAND SWELLING

THE END 9/25/2020 25