Maxilla, mandible, TMJ Flashcards
identify the numbered structures
- incissive fossa
- palatine process of maxilla
- horizontal plate
- greater palatine foramina
- lesser palatine foramina
identify the number structures on the mandible
- coronoid process
- condylar process
- ramus
- angle of the mandible
- body of the mandible
- mental tubercle
- mental protuberance
Identify the numbered structures on the posterior view of mandible
- lingula
- mandibular foramen
- mylohyoid groove
- mylohyoid line
- submandibular fossa
- digastric fossa
- mental spines
what group of muscles suspends and stabilizes the larynx
extrinsic laryngeal muscles
- suprahyoid m.m. = suspension
- infrahyoid m.m. = stabilization
list the suprahyoid muscles
- digastric
- stylohyoid
- mylohyoid
- geniohyoid
list the infrahyoid muscles
- sternohyoid
- sternothyroid
- thyrohyoid
- omohyoid
what part of the digastric muscle is attached the mandible? To what structure on mandible?
a) anterior belly
b) digastric fossa
what structure on the mandible does the geniohyoid muscle attach to?
mental spines
Identify the numbered muscles
- anterior belly of digastric
- mylohyoid
- stylohyoid
- thyrohyoid
- sternothyroid
- sternohyoid
- omohyoid
NOTE: geniohyoid lies superior to the mylohyoid in this view
what is the fulcrum point of the larynx?
the hyoid bone
(fulcrum point means an anatomical structure that acts as a hinge or point of support)
what are the suspension points of the extrinsic laryngeal muscles?
- mandible
- mastoid process
- styloid process
what are the stabilization points of extrinsic laryngeal muscles?
- sternum
- scapulae
What joins the anterior and posterior bellies of the diagastric muscle?
intermediate tendon
when does the stylohyoid muscle split?
prior to insertion on the hyoid bone, (a.k.a the stylohoid sling) it allows the hyoid bone to slide via the intermediate tendon of the digastric muscle
how many muscle make up the floor of the mouth?
- mylohoid muscle
- digastric muscle
- stylohyoid muscle
what is the largest facial bone?
mandible
Larynx suspension diagram
the body of the mandible is at what cervical vertebrae level?
C3
what part of the mandible would you palpate the facial artery?
body of the mandible
true or false. this mandible is not normal
fasle
it is normal
Name the mandibular abnormality
macrogenia
name the mandibular abnormality
micronathia
name the mandibular abnormality
macrognathia
Name the mandibular abnormality
mandibular retrognathism
Name the mandibular abnormality
mandibular prognathism
Dr. Hall refers the Temporomandibular joint (TMJ) as a ________ joint?
true
How many compartments does the TMJ have?
- inferior - allows rotation
- superior - allows gliding
what separates the TMJ compartments and allows for the movement actions
Each TMJ compartment accounts for what % of mouth opening
50 % each
what type of action allows the jaw to slightly open
hinge action (rotation)
what type of action allows the jaw to open widely
combination of hinge and gliding action
where is the point of rotation with TMJ
axis of condylar process
which part of the TMJ glides
condylar process
what is normal distance for mouth opening
4 - 5 cm
With full range of motion, the patient should have 4-5 cm between his/her central incisors
What technique might be used if you are having trouble scissoring a patient’s mouth open after relaxation?
use thumb (at central incisor) & index finger (base of mandible) to pull/glide the mandible forward. then open by rotation (hinge action)
What preop evaluation allows us to test the limitation (if any) of the TMJ
- having the patient open his or her mouth
- asking the patinet to protrude their jaw
what is the term for a large chin
macrogenia
what is the term for a small chin
microgenia
what is the term for a small mandible (or jaw)
micrognathia
what is macrognathia
a large mandible (or jaw)
what is the term for a receding jaw
mandibular retronagthism
what is the term for a protruding jaw
mandibular prognathism
