2 - Spread of infection Flashcards
How does odontogenic infection spread?
- looks for easiest route to escape
- dictated by site of infection, bone density, muscle attachments
What effect does the mylohyoid line have on the spread of mandibular odontogenic infection?
- in relation to the apices of the tooth, the mylohyoid line dictates whether the spread of infection becomes a sublignual abscess or a submandibular abscess
- infection can spread between the sublinugal and submandibular spaces towards the posterior of the mandible as the ridge becomes more open
List the posterior potential spaces.
- superficial temporal space
- deep temporal space
- infratemporal space
- pterygomandibular space
- masseteric space
- lateral pharyngeal space
- prevertebral space
- retropharyngeal space
What are the posterior potential spaces also known as?
Masticatory spaces
Why is spread of infection to the lateral pharyngeal space dangerous?
- contains major vessels and swelling can also obstruct the airway
- carotid arteries and jugular veins
- infection can spread to brain or chest
how can odontogenic infection spread to brain
though cavernous sinus
How can odonotogenic infection cause cavernous sinus thrombosis?
- infection from maxillary teeth with roots located near the inferior ophthalmic vein
- infection from mandibular teeth spreading into infratemporal space where the pterygoid plexus is located
Where is the most common place for infection to spread from upper anterior teeth?
- lip
- nasolabial region
- lower eyelid
- infra-orbital (canine)
Where is the most common place for infection to spread from upper laterals?
Palate
roots palatally placed
Where is the most common place for infection to spread from upper premolars and molars?
- cheek
- infratemporal region
- maxillary antrum (rare)
- palate (palatal root)
Where is the most common place for infection to spread from lower anteriors?
Mental and submental space
Where is the most common place for infection to spread from lower premolars and molars?
- buccal space
- submasseteric space
- sublingual space
- submandibular space
- lateral pharyngeal space
what’s the surgical management
- drainage
- remove source of infection
XLA/ extirpate pulp - antibiotic prescription (systemic involvement)
whats the technique for pus drainage
Hilton technique
- close instrument and insert
- open in situ
What is ludwig’s angina?
Bilateral cellulitis of sublingual and submandibular spaces
