The oral cavity & salivary glands

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The oral cavity & salivary glands

  1. 1. The Oral Cavity & Salivary Glands
  2. 2. Oral Cavity The cavity that extends from lips to pharynx & contains the tongue & teeth2 parts:1. Vestibule: space between ? contains ? divides into sulci: labial & buccal2. Oral cavity proper: enclosed by teeth* The vestibule communicates with cavity proper at: 1. ?? & 2. ??
  3. 3. Oral Cavity ProperSpace that enclosed by teeth & bounded:Roof: hard palateFloor: reflection of M.M. under the tongueAnt.: communicates with VestibulePost.: communicates with oropharynx
  4. 4. Openings2 openings:Oral fissure: from vestibule to outsideOropharyngeal opening (isthmus): from cavity proper to oropharynx
  5. 5. Teeth 2 sets1. Deciduous (primary) teeth: 5 in each quadrant (?) start eruption ~ 6m fully erupted ~ ??1st primary tooth to erupt is ?
  6. 6. 2. Permanent teeth:8 in each quadrant (?)Start eruption ~ ??Fully erupted ~ 12 y (Except?)*3rd molar = wisdom tooth (because it erupts at older age)
  7. 7. Innervation of The TeethGingivae Teeth
  8. 8. The Tongue A muscular organ that covered with mucous memb.DividesOral part: ant. 2/3Pharyngeal part: post. 1/3Surfaces:Palatal (dorsal)Tip & margins (opposite?)Lower surface (ventral, opposite?)Root: connects tongue to ??
  9. 9. Dorsum of The TongueMedian fissure fibrous septumSulcus terminalis: V-shaped ridge, separates?Foramen cecum: (blind opening) at apex of sulcus term. marks the site of ?Lingual papillae: 4 types filiform smallest & numerous fungiform tip & margins vallate 8-12, in front of ? foliate linear folds, on the sides near terminal sulcus
  10. 10. Lingual Tonsil: aggregation of L. nodules on post. 1/3 of the tongue part of Waldeyer’s ring (4 kinds of tonsils)
  11. 11. Ventral Surface of The TongueCovered by smooth & thin m.m.1. Frenulum: fold of m.m. connects …2. Deep ling. Artery & vein from??3. Fimberiated fold
  12. 12. Muscles of The tongue 2 typesIntrinsic: not attached to bone 3 directions: longi., transv., & vertical innervation? Action: change tongue shapeExtrinsic: 4 (5?) muscles
  13. 13. Innervation to The TongueSensory: general: Ant. 2/3 ? Post. 1/3 ? Special: Ant. 2/3 ? Post. 1/3 ?Motor: ??
  14. 14. Arterial Blood Supply to The TongueLingual a.: from?? pass deep to hyoglossus m. Branches: 3?Tonsillar a. from ?Ascending pharyngeal a.
  15. 15. Lymph DrainageTip: submental L.N.Lat. Ant. 2/3: submandibular L.N.Medial Ant. 2/3: DCLNPost. 1/3: DCLN
  16. 16. Genioglossus & Airway PatencyGenioglossus m. is under constant state of contraction, to prevent the tongue from collapsing posteriorly & obstructing airway.- Hypercontraction = ??* When the pt. is deeply anesthetizedgenioglossus may relaxed &The base of the tonguemoves posteriorly
  17. 17. Submandibular Salivary GlandMixed gland (mucous & serous, mainly ?)Rests on post. Border of ??2 parts: large superficial small deep* Relations to superficial & deep parts:
  18. 18. Submandibular duct (Warton’s)same length as parotid duct (~ 5cm)arises from deep part of the gland  pass ant.  opens beside the frenulum (sublingual papilla)
  19. 19. Sublingual Salivary GlandMixed gland (mainly ?)Beneath m.m. of floor of mouthOpens into the floor of mouth: 8-20 ducts (subling. Fold)* Relations to the gland:

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