1 / 34


DENTAL ANATOMY. BY DR. MANISHA MISHRA. Oral Cavity Entrance of the gastrointestinal tract Dental arch: alveolar arch of the maxilla and mandible 4 types of teeth Incissor Canine Premolars Molars. Boundaries. Anterior: Lips

Download Presentation


An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.


Presentation Transcript


  2. Oral Cavity • Entrance of the gastrointestinal tract • Dental arch: alveolar arch of the maxilla and mandible • 4 types of teeth • Incissor • Canine • Premolars • Molars

  3. Boundaries • Anterior: Lips • Posterior: anterior tonsillar pillars (palatoglossal folds) • Lateral: cheeks • Roof: palate • Floor: anterior 2/3 of tongue

  4. Parts • Oral vestibule • Space between the lips and teeth/gingiva • Oral cavity proper -

  5. Functions • Speech • Respiration • Digestion • Chewing • Aesthetic

  6. Landmarks • Frenulum • Mucobuccal fold (posterior) • Mucolabial fold( ant ) • Canine eminence • Parotid papilla ( stenson’s duct ) • External oblique ridge • Retromolartrigone

  7. Landmarks on roof • Incisive papilla: covers the incisive foramen between 2 incissors • Palatine rugae • Uvula

  8. Landmarks on the floor • Tongue • Lingual sulcus • Frenulum

  9. Anatomy of tooth • Anterior teeth: Incissors and canine • Posterior teeth: Molars and premolars Each tooth consists of: • Crown – The part which protrudes from the gum • Root – Part embedded in the bone • Neck – Slightly narrowed region where the crown merges with root

  10. Components of tooth • Pulp containing neurovascular bundle • Dentine • Enamel • Cementum

  11. enamel • Hardest tissue • Surrounds dentine • highly mineralised Main mineral- hydroxyapatite

  12. dentine • Dentine is the most abundant dental tissue • Determines the size and shape of teeth. • Dentine is a bone-like substance that is formed by odontoblast cell which makes up most of the structure of the tooth. • Dentine is found just under the enamel in the crown and under the cementum in the root..

  13. pulp • Connective tissue, mainly consits of odontoblast and fibroblast • Contains neurovascular components • There is anastomosis between arterioles & venules

  14. cementum • Cementum is a specialized bony substance covering the root of a tooth • Cementum is excreted by cells called cementoblast within the root of the tooth • Its color is yellowish and it is softer than either dentine or enamel. Alveolar Bone • Mineralized tissue that surrounds the teeth in jaws

  15. Periodontal ligament • The periodontal ligament is a specialized connective tissue that attaches a tooth to the jaw bone Function • Helps tooth withstand large compressive forces which occur during chewing, without destruction of the adjacent alveolar bone • to serve as a source of sensation. (outer covering of the tooth (enamel) has no sensory receptors itself.)

  16. gum • Mucous-membrane-covered connective tissue attached to and surrounds the neck and the alveolar bone. • Edges of the gums around the teeth are free and extend into the spaces between the teeth. • healthy gum is pink and tough. • have limited sensitivity to - pain, Temperature, pressure

  17. Blood supply • Periodontal plexus • Inferior/superior alveolar vessel • Periosteal vessel • Vessel from adjacent musculature

  18. Nerve supply • Upper teeth – maxillary nerve (Ant. Sup. Alveolar, middle sup. Alveolar & post. Sup. Alveolar nerves) • Lower teeth – mandibular nerve (inferior alveolar nerve)

  19. Mandible Only moving bone present in skull, Has sockets for lower teeth • Parts – Body & 2 Rami Body – • 2 surfaces – External & Internal • & 2 borders – Upper (Alveolar), Lower(Base) Ramus • 2 Processes – Coronoid & Condyloid

  20. Mandibular Foramen - opening on the medial surface of the ramus • Oblique Line - located on the superior lateral surface of the body • Mental Foramen - foramen for the transmission of the mental nerve (cutaneous to the lower third of the face) and artery

  21. The mandible is the body support for the mandibular teeth • And is also the insertion for the four primary muscles of mastication and the accessory muscles of mastication.  • It is the movable portion of the TMJ articulation with the temporal bone

  22. The Muscles of Mastication - The chief muscles of mastication are: • Masseter. • Medial Pterygoideus • Lateral Pterygoideus • Temporalis. Nerve • Mandibular division of Trigeminal Nerve

  23. maxilla • The maxilla is a fusion of two bones along the palatal fissure that form the upper jaw • has sockets for upper teeth

  24. Parts • Body • Four processes • The zygomatic process • The frontal process • The alveolar process • The palatine process

  25. NOMENCLATURE • DECIDUOUS DENTITION: • Central incisior=A • Lateral incisior=B • Canine=C • 1StDecidious molar=D • 2ndDecidious molar=E

  26. Deciduous dentition

  27. PERMANENT DENTITION: • Central incisior=1 • Lateral incisior=2 • Canine=3 • 1st premolar=4 • 2nd premolar=5 • 1st permanent molar=6 • 2nd permanent molar=7 • 3rd permanent molar=8

  28. Permanent dentition

More Related