Anatomy W7 - Osteology of the Mandible Flashcards
What is the mental symphysis?
The fibrous joint on the chin that unites the two bones of the mandible in a foetus.
Ossified in an adult
Name a feature of the mandible that is unique to humans.
The mental protuberance
What is a clinical problem of atrophy of the mandible from tooth loss?
The mental foramen can become higher up on the body of the mandible and a denture can press on this causing pain.
What is the pterygoid fovea? Where is this found?
Depression at the front of the condylar neck.
What does the pterygoid fovea provide attachment for?
The inferior belly of the lateral pterygoid
What is the origin and attachment of the Superior and inferior lateral pterygoid muscle?
Superior belly:
O - base of the skull
A - Capsule of TMJ
Inferior belly:
O - Lateral surface of the lateral pterygoid plate of sphenoid bone
A - the pterygoid fovea - Depression at the front of the condylar neck.
What is the origin and attachment for the medial pterygoid muscle?
Origin :
Superficial head - maxillary tuberosity
Deep head - medial surface of the lateral pterygoid plate.
Insertion - To the rough medial side of the angle of the mandible
The mylohyoid muscle lies along the mylohyoid line, what does the mylohyoid muscle separate?
The floor of the mouth and the submandibular region.
What is the danger of abscesses that are close to the mylohyoid line?
The infectious material from the abscess can cause bone to degrade.
If the abscess leaks/bursts, the infectious material can tract back from the tissues and pass through the surrounding connective tissues planes to enter the thorax where it can cause Ludwig’s angina
What is a complication of dental sepsis?
Ludwigs angina
What is the submandibular fossa? Where is this in relation to the mylohyoid line?
A smooth area where the submandibular gland lies.
It lies behind and below the MH line
What is the sublingual fossa? Where is this in relation to the mylohyoid line?
A smooth area where the sublingual gland lies.
It lies in front and above the MH line
What muscle attaches to the Upper mental spines/ genial tubercle of the mandible?
Genioglossus
What muscle attaches to the lower mental spines/ genial tubercle of the mandible?
Geniohyoid
Where does the temporalis muscle attach on the mandible?
The anterior border of the of the ramus and the coronoid process
