Occlusion and Stuff-Ashman Flashcards
(28 cards)
What is normal function?
Normal smooth action of the teeth with no pain
What is Parafunction?
Doing other things with your teeth besides their proper function
What is Detrimental parafunction?
misuse of the teeth in any way
Such as opening packages with teeth or biting pens
What is Accessory parafunction?
doing necessary functions such as breathing, swollowing, and speaking that may alter how our mandible moves
What is Dysfunction?
painful movement most likely caused by a deformity or lack of coordination
What are the important structures of the mandible in occlusion?
The condyle
Where does the condyle go?
In the glenoid fossa of the temporal bone
What is internal dearrangment?
When the condylar disc does not go in the proper place until fully protruded
Usually will hear a “popping” sound
What are the muscles of mastication?
Masseter
Lateral Pterygoid
Medial Pterygoid
Temporalis
Which muscles are the elevators?
Masseter
Medial Pterygoid
Temporalis
What muscles are the depressors?
Lateral Pterygoid
Explain LA-ME in terms of the pterygoids
LA- lateral pterygoid makes the mouth open
ME- medial pterygoid makes the mouth closed
Explain the nature of the tempromandibular joint
gingylmoarthroidal joint
gingylmo- hinging
arthroidal- sliding
What type of lever is the TMJ?
Class three lever
What is the purpose of the articulator?
Models after the relationship of the temporal bone and the mandible, to accurately create dental products
What is the difference between the ARCON and NONARCON articulators?
ARCON the angle between the condylar inclination and the occlusal table does not change
NONARCON the angle is adjustible
Compare Cast and Model
A model is used for display purposes only
A cast is an accurate replica uses to make dental appliances
What are the anatomical landmarks to record in impressions and casts?
All surfaces of the teeth
Vestibule
Fulcrum
Unusual anatomy such as tori and exostoses
Where would you most likely find exostoses?
The Buccal portion near premolars
What is alginate made of?
agar, diatomaceous earth, and other things
Define syneresis
Losing water
Define imhibition
Gaining water
What is the chemical reaction with Gypsum?
calcium sulfate hemihydrate with water, loses heat and becomes calcium sulfate dihydrate
Define the types of gypsum
2 - plaster
3- low to moderate strength
4- high strength, low expansion
5- high strength, high expansion
