Dentistry Students
Anatomy Lab /12
Dr. Firas M. Ghazi
Oral Cavity and Maxilla
Objectives
By the end of this lab students are expected to be able to
1. Recognize structures visible in the mouth
2. List the boundaries of the oral cavity
3. Describe the relation of three major salivary glands &/or ducts to the oral cavity
4. Recall the close relation of the lingual nerve to the lower third molar tooth
5. Discuss the relation of floor of mouth to submandibular & submental spaces
6. Describe the extrinsic and intrinsic muscles of tongue, their actions and nerve supply
7. Distinguish major landmarks of maxilla including foramina and their content
Lab check list
A- Mouth of the living
 Lips and cheeks
 Vestibule of Mouth
1. Gums
2. Papilla of parotid gland duct
 Teeth (Incisors, Canines, Premolars, Molars)
 Mouth cavity proper
1. Tongue/Frenulum of the tongue
2. Hard and Soft palate
3. Palatoglossal arch (Oropharyngeal isthmus)
4. Papilla of submandibular duct
5. Sublingual fold
B- Skeleton of the oral cavity
 Mandible
 Important muscles attached
1. Buccinator nerve supply…………..
2. Mylohyoid nerve supply…………..
3. Muscles of mastication nerve supply…………..
 Hard palate
 Maxillae
 Incisive foramen transmit ……………..
 Palatine bone
1. Greater palatine foramen transmit ……………..
2. Lesser palatine foramen transmit ……………..
 Sutures
1. Intermaxillary
2. Interpalatine
3. Palatomaxillary
 Maxilla
 Paired (upper jaw is formed by two maxillae)
 Body of the Maxilla
 Pyramidal
 Large cavity inside (maxillary air sinus)
Further assistance on:
University website: http://staff.uobabylon.edu.iq/site.aspx?id=93
Facebook page: Anatomy For Babylon Medical Students
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Dentistry Students
Anatomy Lab /12
Dr. Firas M. Ghazi
 Anterior surface
 Infraorbital foramen transmit……………..
 Incisive fossa: above the incisor teeth
 Canine eminence: produced by canine root
 Canine fossa: lateral to canine eminence
 Nasal surface (base)
 Part of lateral wall of nasal cavity
 Maxillary hiatus: leads into maxillary sinus
 Orbital surface: Floor of orbital cavity
 Infratemporal surface: (Anterior boundary of ……………
 Few foramina for posterior superior alveolar nerve and vessels
 Processes of the Maxilla
1. Frontal process: projects upwards/articulates with ……..
2. Zygomatic process: extends laterally/articulate with …………
3. Alveolar process: carries the upper teeth
4. Palatine process: part of hard palate
 Blood supply of maxillary teeth by branches maxillary artery
 Posterior, Middle, and Anterior-superior alveolar Arteries
C- Boundaries
 Roof
 Hard and Soft Palate
 Floor
 Horseshoe-shaped region situated beneath the anterior two-third of the tongue
 Mucus membrane
 Sublingual salivary gland
 Submandibular duct
 Genoglossus muscle
 Geniohyoid muscle
 Mylohyoid muscle
D- Tongue
 Parts:
 Anterior 2/3rd (oral part)
 Posterior 1/3rd (pharyngeal part)
 Root
 Important landmarks:
 Sulcus terminalis
 Foramen caecum
 Muscles (Intrinsic and Extrinsic)
 Vascular supply
 Lingual artery
 Lingual and Deep lingual veins
 Nerve supply:
 Motor supply all by X)) except ……………
 Sensory supply: Anterior 2/3rd: …………………….. Posterior 1/3rd: …………………………..
 Taste fibers: Anterior 2/3rd: ……………………..Posterior 1/3rd: …………………………..
Further assistance on:
University website: http://staff.uobabylon.edu.iq/site.aspx?id=93
Facebook page: Anatomy For Babylon Medical Students
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Dentistry Students
Anatomy Lab /12
Dr. Firas M. Ghazi
Comprehension questions:
On lying down, what prevent the tongue from falling back into the oropharynx?
Home work (1):
An eight-year-old girl presented
with swelling in the floor of her
mouth (Asterisk in figure 1) that
began 10 days prior. She denied any
recent fever or illness. Examination
revealed a non tender, sublingual
mass with no obvious extension into
the neck. No cervical lymph node
enlargement was present.
Diagnosis: Ranula
Question
1- Which one of the following
structures is the most likely
cause?
A. Submandibular gland
B. Sublingual salivary gland
C. Lingual vein
D. submental lymph node
4 1
3 2
*
Figure 1:
Source of Image and case:
http://www.aafp.org/afp/2011/0815/p441.html
2- Identify the numbered structures in the figure
Home work (2):
1. Discuss the anatomical aspects of Ludwig’s angina
2. Define the eye tooth and discuss its relation to facial vein
Further assistance on:
University website: http://staff.uobabylon.edu.iq/site.aspx?id=93
Facebook page: Anatomy For Babylon Medical Students
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