The Oral Cavity Flashcards
What cositutes the roof of the oral cavity?
The hard palate and the soft palate
What creates the floor of the oral cavity?
The tongue and other soft tissues
What creates the lateral walls of the oral cavity?
The cheeks
What is the anterior boundary of the oral cavity?
The oral fissure
What is the posterior boundary of the oral cavity?
The oropharyngeal isthmus
What is the oral vestibule?
The space between the cheeks and the teeth
What is the oral cavity proper?
From teeth to the ring made by the palatopharyngeal arch, uluca and tip of the epiglottis
What are the two arches of the oral cavity?
The anterior or palatoglossal arch
The posterior or the palatopharyngeal arch
What comprises the hard palate?
The maxilla and the palatine bones
What are the two muscles found in the oral cavity?
The palatoglossus- forms the palatoglossal (anterior) arch, and the palatogpharyngeus which forms the palatopharyngeal or the posterior arch
What are the roles of the muscles of the soft palate?
Tense and elevate soft palate during swallowing and yawning
What are the innervation of the muscles of the soft palate?
The pharyngeal branch of the vagus nerve
What happens if the pharyngeal branch of the vagus nerve is damaged?
Pulls ulva away from the side of the affected nerve
What are the nerves that are involved in the gag reflex?
The afferent limb is the glossopharyngeal nerve and the efferent limb is the vagus nerve- both important in preventing choking
What is the sensory supply to the teeth?
The lower jaw is supplied by the inferior alevolar nerve tat is a branch of CNV3
Name the extrinsic muscles of the tongue?
The genioglossus, the hyoglossus, the styloglossus and the palatoglossus
What is the role of the extrnisic muscles of the tongue?
Allow the tongue to change positions and help anchor tongue to the hyoid bone and the mandible
What is the role of the intrinsic muscles of tongue?
Help the tongue to change shape, with a action based in the direction which the fibres run in
Name some of the intrinsic muscles of the tongue?
The superior longituindal, the vertical, tranverse and inferior longitudinal
What is the normal motor innervation of the tonuge?
Hypoglossal nerve
Where does the tongue deviate in a damage to the innervation of the muscles of the tongue?
The tongue deviates towards the side of the lesion
What is the duct that the partoid gland opens into?
Stensons duct
What is the duct theat the submandibular gland opens into?
Whartons duct
Which of the glands opens via multiple ducts?
The sublingual gland
What are savliary glnad stones made of?
Usually calcium based
Which is the most commonly affected gland for savlivary stones and why?
The submandibular duct, and produces the salvia that is comparitvely thicker than the partoid gland
How would a salviary gland stone present?
As pain or swelling of the affected gland at meal times
What are the tonsils that you would find in the amouth (top to bottom)
Adenoids, the tubal tonsil, the palatine tonsil and the lingual tonsil
What are some of the common viral causes of tonsilitis?
Adenovrisus and a rhinovirsus
What are some of the features of bacterial tonsilitis?
Beta haemolytic strep, accompanied by the cervical lympadenopahty, fever and pus
What are some of the features of tonsilitis?
The palatine tonsil, sore theart, and adenophyagia and dysphagia if severe
What is the peritonislar absecces?
A severe complication of bacterial tonsilitis that is usually caused by strep pyogenes
What are some of the key syytmptoms of a peritonsilar abscess or a qunisy?
Often unilateral, and the ulva deviates away from the lesion, and patients typically present as systematically unwell with trismus or a hot ptoato voice
