Oral Cavity Flashcards
What does through the mandibular foramen?
Inferior alveolar n. and vessels
What is found in the sublingual fossa?
sublingual gland
What is found in the submandibular fossa?
Submandibular gland
The hard palate consists of what?
- Maxillary bone: sockets for teeth included
- Palatine bone
What does the hard palate do?
Separates the oral cavity from the nasal cavity
Is needed for creating suction
What is Orofacial Celfting?
Either a cleft lip or cleft palate in children. This defect can make it hard to create suction for drinking
How many teeth (and what types) do we have as children and adults?
Children: 8 incisors, 4 canines, and 8 molars
Adults: 8 incisors, 4 canines, 8 bicuspids, 8 molars, and 4 third molars
What innervates the teeth?
Molars (V2): Posterior superior alveolar n.
Bicuspids (V2): middle superior alveolar n. (from infraorbital n.)
Canines and incisors (V2): anterior superior alveolar n. (from infraorbital n.)
Mandibular teeth (V3): Inferior alveolar n.
What innervates the gums of the mouth?
Superior Gums: Multiple branches of V2
Buccal surface: Infraorbital nerve and branches of superior alveolar n.
Glossal/palatal surface: nasopalatine nerve and greater/lesser palatine nerve
Inferior Gums: Mandibular n. (V3)
What does the oral cavity consist of?
Vestibule: space bounded by teeth/gums and lips/cheeks
Oral cavity proper: space bounded by dental arches
What are the boundaries of the oral cavity?
Roof: Hard/soft palate
Floor: mylohyoid and geniohyoid
Lateral: Cheek
Anterior: Lips
Posterior: palatoglossal folds
What is contained in the oral cavity?
Teeth
Tongue
Sublingual and submandibular glands
Nerves, lymphatics, and vessels
What is a sore throat?
Infected or inflamed mucosal lining of the oropharynx
What supplies blood and innervation posterior to the incisor teeth?
Nasopalatine n. and sphenopalatine a. (branches of maxillary n. and a.)
What supplies blood and innervation to principle portion of hard palate?
Greater Palatine n. and a. (Branches of maxillary nerve and descending palatine artery)
What supplies blood and innervation to the soft palate?
Lesser palatine n. and a.
What does the soft palate consist of?
Fibromuscular tissue and mucous glands
What does the soft palate do?
Depresses during chewing to keep food in oral cavity but elevates during swallowing to seal off nasopharynx from oropharynx
The soft palate contains 5 pairs of skeletal muscles…what are their innervations?
4 of them will be CN X
1 of them will be CN V3
If the vagus nerve is damaged, what would be a sign in th oral cavity?
Soft palate will appear asymmetric (lower on side of lesion). Uvula will deviate to opposite side of lesion.
What nerves control the gag reflex?
Sensory: Glossopharyngeal
Motor: Vagus
Where is a potential site for ingested object to get stuck?
Valleculae (between the median and lateral glossoepiglottic folds)
What makes up the tonsillar ring?
Two Tubal Tonsils, Two Palatine Tonsils, one pharyngeal tonsil (adenoid) and one lingual tonsil
What do tonsils do?
Lymphoid masses that serve as antigen-sampling devices to assist in immunological surveillance
What are the boundaries of the palatine tonsil?
palatoglossal and palatopharyngeal folds
What are Tonsillar Infections?
Typically, unilateral complication due to tonsilitis (poor response to antibiotics)
Uvula is pushed to opposite side and mouth is wide open
*Can have the potential to infect the retropharyngeal space.
What is the retropharyngeal space?
The space behind the pharynx that can have abscesses which is a medical emergency due to it traveling all the way down the body
The floor of the oral cavity consist of what?
Frenulum of tongue
Sublingual caruncle: opening of the submandibular duct
Sublingual fold and duct opening
Where is the most common site for salivary stones?
Sublingual caruncle
What does the mucous membrane of the ventral surface of the tongue do?
Facilitates rapid absorption of drugs
What are the boudneries of the floor od the oral cavity?
mylohyoid and geniohyoid
The submandibular duct crosses the lingual nerve, which one is one top?
Submandibular duct
What innervates the mylohyoid?
Nerve to mylohyoid
What innervates the geniohyoid?
C1 branches via CN XII
What is the purpose of the mylohyoid and geniohyoid?
When jaw is closed, elevate the floor of the mouth and tongue during swallowing.
