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Oral Cavity
GA2 oral cavity
| Question | Answer |
|---|---|
| What are the boundaries of the oral cavity? | Roof: Palate Floor: Tongue Lateral wall: Cheeks Anterior wall: Lips |
| How does the oral cavity communicate anteriorly and posterior? | Ant: to the outside through the opening of the mouth (oral fissure) Post: to the oral pharynx through the oropharyngeal isthmus |
| Vestibule | space between lips teeth and mouth |
| Oral Cavity Proper | entire mouth cavity (stick out tongue and includes teeth) |
| Frenulum of upper lip: | a median fold if mucous membrane connecting the internal surface of upper lip to outer surface of upper gingivum |
| Frenulum of lower lip | median fold of mucous membrane connecting the internal surface of lower lip to outer surface of lower gingvum |
| Frenulum linguae (of tongue) | a median fold of mucous membrane connecting the inferior surface of the tongue to the floor |
| Sublingual fold | a fold of mucous membrane over the sublingual salivary gland |
| Sublingual Papilla (caruncle) | a papillae on each side frenulum of tongue for submandibular duct |
| Duct of parotid gland | opposite upper second molar tooth |
| Where are the sensory supply to lips & cheeks derived from? | Maxillary (V2) Mandibular (V3) divisions of trigeminal nerve (C.N. 5) |
| What branches innervate the cheeks? | infraorbital n. (V2) Zygomaticofacial n. (V2) Buccal n. (V3) |
| What branches innervate the lips? | infraorbital n. (V2) for upper lip mental n. (V3) for lower lip |
| When a person receives a root canal what part of the tooth gets removed? | Pulp cavity |
| Layer of teeth | crown of tooth covered by enamel which is covered by dentine |
| How many permanent teeth | 32 |
| Name the type of permanent teeth, number and function | Incisors (4) cutting, Canines (2) tearing, Premolars (4) grinding, Molars (6) |
| How many deciduous teeth | 20 |
| Name the type of deciduous teeth, number and function | Incisors (4) cutting, Canines (2) tearing, Molars (4) |
| What is the arterial supply to the teeth? | Superior & Inferior alveolar arteries (branch of maxillary artery) |
| Where do lymphatic vessels mainly drain into from the teeth? | submandibular lymph nodes |
| What is the nerve innervation to the teeth and what branch are they coming from? | Superior alveolar nerves- V2 Inferior alveolar nerves- V3 |
| The anterior 2/3 of the hard palate is formed by what? | palatine process of maxillary bone and the horizontal plates of the palatine bone |
| Where is the incisive fossa? | a depression that is found posterior to the central incisors where incisive canals open |
| What passes through the incisive fossa? | nasopalatine nerves |
| Where is the greater palatine foramen located? | medial to the third molar tooth |
| What passes through the greater palatine foramen? | the greater palatine nerves and vessels emerge from this foramen |
| What passes through the lesser palatine foramen | lesser palatine nerve |
| Which palate has no bony skeleton but has an aponeurotic part and has a posterior muscular part? | Soft palate |
| The soft palate is has a curved free margin from which hangs the ? | uvula |
| Laterally, the soft palate is continuous with the wall of the pharynx and is joined to the tongue and pharynx by the ? and ? arches | palatoglossal and palatopharyngeal |
| What is space between the oral cavity and the pharynx? | fauces |
| What are the boundaries for the fauces? | Superior: soft palate Inferior: root of the tongue Lateral: faucial pillars (arches) |
| What is the isthmus of the fauces? | the constricted aperture between the cavity of the mouth and the pharynx |
| Tensor veli palatini muscle originate? | scaphoid fossa of medial pterygoid plate, sphenoid bone & pharyngotympanic tube of cartilage |
| Tensor veli palatini Insertion? | palatine aponeurosis |
| Tensor veli palatini nerve? | medial pterygoid nerve (branch of V3) |
| Tensor veli palatini action? | tenses soft palate & opens auditory tube during swallowing & yawning |
| Levator veli palatini origin? | pharyngotympanic tube cartilage & petrous portion of the temporal bone |
| Levator palatini nerve? | pharyhgeal branch of vagus nerve via pharyngeal plexus |
| Levator veli palatini action? | elevates soft palate during swallowing & yawning |
| Palatoglossus origin? | palatine aponeurosis |
| Palatoglossus insertion? | side of tongue |
| Palatoglossus action? | elevates posterior tongue & draws soft palate onto tongue |
| Palatopharyngeus origin? | hard palate & palatine aponeurosis |
| Palatopharyngeus insertion? | lateral wall of pharynx |
| Palatopharyngeus action? | tenses soft palate & pulls walls of pharynx superiorly, anteriorly & medially during swallowing |
| Musculus uvulae origin? | posterior nasal spine & palatine aponeurosis |
| Musculus uvulae insertion? | Mucosa of uvula |
| Musculus uvulae action? | shortens uvula & pulls it superiorly |
| What is the arterial supply of the soft palate? and what is is a brach of? | greater palatine (descending palatine artery) lesser palatine (smaller branch of descending palatine; anastomoses with the ascending palatine branch of facial artery) |
| What is the venous drainage of the soft palate? | palatine veins drains into the pterygoid venous plexus |
| What is the nerve innervation to the soft palate? | Greater palatine (supplies gingiva, mucous membrane & glands of most of the hard palate) Lesser palatine-(supply the soft palate) Nasopalatine (supplies the mucous membrane |
| What organ is a mobile muscular organ that can assume a variety of shapes and positions? | tongue |
| What two cavities is the tongue on? | oral cavity an partly in the oropharynx |
| What are the functions of the tongue? | swallowing, articulation, mastication |
| What are the primary salivary glands? | parotid, submandibular, sublingual |
| Where are the accessory salivary glands? | scattered over the palate, lips, cheeks, tonsils, and tongue |
Created by:
atruelove
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