The Oral Cavity Flashcards
Where is the infra temporal fossa?
under the ramus of mandible and zygomatic arch
Where are the teeth located?
Alveolar process of maxilla and mandible
What kind of joint is a tooth?
Gomphoses
Where is the pterygopalatine fossa?
Medial to infra temporal fossa
What holes are in the infra temporal fossa?
Pterygopalatine fossa, inferior orbital fissure and foremen ovale
What nerve is in the myohyoid sulcus?
Nerve to myohyoid
Where is the myohyoid line and what attaches there?
Below gums, myohyoid
How does the jaw move when it opens?
Forward out of mandibular fossa to articular tubercle
What ligaments are responsible for changing center of rotation when jaw opens and closes?
Sphenomandibular and stylomandibular
Where is the body vs the ramus of the mandible?
Ramus is the side above the angle and body is below the teeth from angle
How does the center of rotation of the mandible change when opening the mouth and why?
Changes from tmj to angle to open mouth wider
What kind of muscle is massater?
Pennate
What type of muscle creates more force but less range?
Pennate
What type of muscle creates less force but more range?
Longitudinal
Why do we change the center of rotation when opening mouth?
Increase range without decreasing force
What are the superficial closers?
Temporalis and massater
What does the medial pterygoid muscle do?
Close jaw, keeps jaw center by pulling medially
What does the lateral pterygoid muscle do?
Opens jaw, pulls jaw forward to help change center of rotation
Which mouth muscle is the complement of the masseter?
Medial pterygoid
What are the deep openers of the mouth?
Mylohyoid, digastric and geniohyoid
How is mylohyoid and anterior digastric innervated?
Trigeminal
How is posterior belly innervated?
Facial
How is geniohyoid innervated?
Hypoglossal
What are the main functions of the oral cavity?
Mastication and respiration
What are the boundaries of the oral cavity?
Palates, mylohyoid, epiglottis and teeth
Which teeth are wisdom teeth?
Third molar