Pranav Pundarik is teaching live on Unacademy Plus
Ecto-Mesodermal in origin Attached to maxitla and mandible bone . Natural space between two teeth is DIASJMi
Some important terma: *Dentition: Arrangement of teeth on jaws. **Dentition tybes: > >Monolphyodont ( Jeeth whic appear only once in a life) (Premolar8 and last molar) > Diphyodont (Appear twice in life) (Ancisors, canines, and first two molars) > >Thecodont : (Jeeth are present in bony socket in jaw) (sAs in us) Heterodont: (Specific teeth for specific function)
Incisors: For gnawing the food. Long. . Canines : $ arp. Jea ring. Absent in erbivores. . Pre molars: Chewing and Grushing. Molars: Chewing and crushing of food. *xpre molars and molars, together help in mastication of food.
Tor a child: 2402/2402 Totat teeth number: 20) gor a 17 year old: 2122/2/122 (Total teeth number: 28) For an Adult: 2123/2128 (Jotal teeth number 82)
. The white part ia called the 8NMBB. Enamel 18 the hardest material. Enamel i8 ectodermal in origin. Secreted by efiM8B0BBofSJC8BB; . All other tooth parts are Mesodermal in origin. . DENJINE : Just below enamel. Surrounded by a pulp cavity. Bined by Dentine secreting cells-0DONJ0BBASJ Cells. 7
Three pairs of Salivary glands are there 2. Submandibular (or Submaxillary) . 3. Sublingual ;ecrete Salivary amylase and lysozyme(=-Saliva). .
PAROTID 3BoAND . In cheeks. (Near Bar) . Bargest in size. . Contributes to nearly 25% of 8aliva 8ecreted.
SUBMANDIBULAR GLAND . Submaxillary Gland . At junction of jaws contributes to nearly 70% of saliva secreted.(Maximum secretion) . DUCT : Wharton's Duct (Longest Salivary Duct)
. Saliva: 99.5% H20, . Salivary Amylase also called as Ptyalin. . ptyalin maximally secreted by peAROJ1DS . Wrea and uric acid (Very small amount) atso secreted