Lip, Mouth & Palate Flashcards
The substance of the lips is made up by
the orbicularis oris muscle and the muscles that radiate from the lips into the face
philtrum of lip
the shallow vertical groove seen in the midline on the outer surface of the upper lip
which structure connects the inner surface of the lips to the gums?
labial frenulae
The mouth extends from
lips to the pharynx
oropharyngeal isthmus
- entrance into the pharynx
- formed on each side by the palatoglossal fold
mouth is divided into
vestibule and mouth cavity proper
vestibule
The vestibule lies between the lips and the cheeks externally and the gums and the teeth internally
roof of mouth proper
The roof of the mouth is formed by the hard palate in front and the soft palate behind
Floor of Mouth
The floor is formed largely by the anterior two thirds of the tongue and by the reflection of the mucous membrane from the sides of the tongue to the gum of the mandible.
sensory innervation of roof
The greater palatine and nasopalatine nerves from the maxillary division of the trigeminal nerve
sensory innervation of floor
The lingual nerve (common sensation), a branch of the mandibular division of the trigeminal nerve.
The taste fibers travel in the chorda tympani nerve, a branch of the facial nerve.
sensory innervation of cheek
The buccal nerve, a branch of the mandibular division of the trigeminal nerve (the buccinator muscle is innervated by the buccal branch of the facial nerve)
lingual nerve is in close relation with
lower third molar tooth
deciduous teeth
There are 20 deciduous teeth
- four incisors, two canines, and four molars in each jaw
- erupt between 6months - 2years of age
permanent teeth
- There are 32 permanent teeth: 4 incisors, 2 canines, 4 pre- molars, and 6 molars in each jaw
- begin erupting at 6 yrs of age
The last tooth to erupt is?
the third molar, which may happen between the ages of 17 and 30
hard palate is formed by?
- the palatine processes of the maxillae
- the horizontal plates of the palatine bones
soft palate is composed of?
mucous membrane
palatine aponeurosis
muscles
Palatine Aponeurosis
The palatine aponeurosis is a fibrous sheet attached to the posterior border of the hard palate. It is the expanded tendon of the tensor veli palatini muscle.
Muscles of the Soft Palate
tensor veli palatini, the levator veli palatini, the palatoglossus, the palatopharyngeus, and the musculus uvulae
Nerve Supply of the Palate
- The greater and lesser palatine nerves
- nasopalatine nerve
- glossopharyngeal nerve
Blood Supply of the Palate
- The greater palatine branch of the maxillary artery, -the ascending palatine branch of the facial artery,
- the ascending pharyngeal artery
Lymph Drainage of the Palate
Deep Cervical Lymph Nodes
Palatoglossal Arch
- a fold of mucous membrane containing the palatoglossus muscle, which extends from the soft palate to the side of the tongue
- The palatoglossal arch marks where the mouth becomes the pharynx.
Palatopharyngeal Arch
a fold of mucous membrane behind the palatoglossal arch that runs downward and laterally to join the pharyngeal wall. The muscle contained within the fold is the palatopharyngeus muscle.
which structure is located between the palatoglossal and palatopharyngeal arches?
palatine tonsils
which structure is used during the production of explosive consonants in speech
The pharyngeal isthmus (the communicating channel between the nasal and oral parts of the pharynx) is closed by raising the soft palate.
Angioedema of the Uvula (Quincke’s Uvula)
The uvula has a core of voluntary muscle, the musculus uvu- lae, that is attached to the posterior border of the hard palate. Surrounding the muscle is the loose connective tissue of the submucosa that is responsible for the great swelling of this structure secondary to angioedema.
nerve supply of soft palate muscles
all muscles are supplied by pharyngeal plexus except tensor veli palatini which is supplied by Nerve to medial pterygoid from mandibular nerve
