PHED-4547EL Lecture Notes - Lecture 23: Cleft Lip And Cleft Palate, Dental Plaque, Deciduous Teeth
27 Apr 2020
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Document Summary
Esophagus, stomach, small and large intestines, anus. Abnormalities of the oral cavity: cleft lip and cleft palate. Embryologically, face and palate formed by coalescence of cell masses that merge to form facial structures. Palate formed by two masses of tissues that grow medially and fuse at midline to separate as nose and mouth. Maldevelopment leads to defects: 1 per 1,000 births, multifactorial inheritance pattern. Surgical correction (cheiloplasty: cleft lip: soon after birth, cleft palate: 1 to 2 years of age; speech therapy to correct nasal speech. Teeth: specialized structures that develop in tissues of the jaws. Two sets: temporary or deciduous teeth (20 teeth, permanent teeth (32 teeth) Missing teeth or extra teeth: common abnormality. Enamel forms at specific times during embryologic period. Tetracycline: administered during enamel formation causes permanent yellow-gray to brown discoloration of the crown. Oral cavity: diverse collection of aerobic and anaerobic bacteria that mix with saliva, forming sticky film on teeth (dental plaque)
