Dental Anatomy and Histology

• Regions of the face


  • Forehead
  • Temporal area
  • Orbital area
  • External nose
  • Zygomatic
  • Mouth and lips
  • Cheeks
  • Chin
  • External ear
• Facial features

  • Inner canthus of the eye
  • Outer canthus of the eye
  • Ala of the nose
  • Philtrum
  • Tragus
  • Mental protuberance (arrow)
  • Angle of the mandible
• Lips


  Gateway to the oral cavity, formed externally by the skin and internally by the mucous membrane

  
• Lips


  • Labial/lateral commissure is the angle at the corner of the mouth where the upper and lower lips join
  • Nasolabial sulcus is the groove extending upward between each labial commissure and nasal ala
• ACTIVITY 1
• Jaws


  • Maxilla (Upper jaw)
  • Mandible (Lower jaw)
• Zygomatic bone
• The oral cavity

  • Vestibule
  • Oral cavity proper

  
• Vestibule


  The space that exists between the lips/cheeks and the teeth (can swirl your tongue in this space), lined with mucosal tissue

  
• Vestibule


  • Buccal vestibule - the area between the cheeks and the teeth or alveolar ridge
  • Mucobuccal fold - the base of each vestibule where the buccal mucosa meets the alveolar mucosa
• Infiltration of local anesthetic
• Alveolar mucosa

  Mucosal layer covering the alveolar process of maxillae and mandible and loosely attached to underlying bone
• Frena


  Sickle shaped folds of loose connective tissue running from lips/cheeks to the alveolus in some areas of the muco-buccal fold or sulcus, their primary function is to provide stability of the upper and lower lip and the tongue

  
• Gingiva


  • Free gingiva
  • Attached gingiva
  • Interdental papilla
  • Mucogingival junction
  • Gingival sulcus

  
• Gingiva has an orange peel appearance
• ACTIVITY 2
• The oral cavity proper


  • Hard palate
  • Soft palate
  • Tongue
  • Floor of mouth
  • Teeth

  
• Hard palate


  Rugae, Incisive Papilla, Incisive foramen
• Soft palate
• Tongue


  Dorsal surface, Lingual frenum
• ACTIVITY 3