Factors of Occlusion I Flashcards
Occlusion
Static Occlusion:
! The ____ relationship between the incising and masticating (occlusal) surfaces of the maxillary and mandibular teeth
Functional Occlusion: ____
Static Occlusion: maxillary & mandibular teeth come together in the most closed occlusion; tightest inter-cuspal occlusion
static
talking and chewing
Working/Functional cusps are ____
flatter
Occlusion - Terms
! Maximum Intercuspal Position: (MIP)
! Teeth are closed together in the most
____ position
! Vertical Dimension of Occlusion (VDO) or Occlusal Vertical Dimension OVD):
! Supported by ____ teeth
! Particularly the ____
! Occlusal Table:
! Defined area from cusp tip to cusp tip in a ____ direction
! Defined area from marginal ridge to marginal ridge in a ____ direction
! ____ in the middle
ALL PATIENTS have their own ____. It’s their own “most closed position” - but we will learn the traditional one.
VDO/ OVD: dimension/ measurement from bottom of ____ to bottom of ____ when biting together -someone with no teeth/ no dentures, can tell their ____ is close to their nose because they
have lost their verticals dimension.
-supporting the face
-supported by supporting/working cusps & posterior teeth
intercuspal
posterior
supporting cusps
B/L
M/D
central fossa
nostrils
chin
mandible
Occlusion - Terms
! Supporting Cusps (holding cusps):
! ____
! ____
! Supporting Cusps tend to be:
! Slightly ____ than non
supporting cusps
! Slightly ____ than non supporting cusps
! Non Supporting Cusps (guiding cusps):
! ____
! ____
Working/holding/ supporting cusps come together to support the ____.
Non-supporting cusps are also called ____.
- do not have a role in MIP or VDO.
- DO have a role in ____ the jaw to move sideways.
mandibular buccal
maxillary lingual
shorter
rounder
maxillary buccal
mandibular lingual
VDO
guiding cusps
guiding
Occlusion - Terms
! Inner aspect/Inner incline:
! Area within the occlusal table between the ____ and its own ____
FOUND ON BOTH ____
! Guiding incline:
! The inner aspect of the ____ cusps
• Google: “The planes of occlusal ridges that determine the path of supporting cusps”
• NOT FOUND ON ____
• UTILIZED IN ____ OCCLUSION; not static.
cusp tip
central fossa
supp/non-supp
non-supporting
supporting cusps
functional
Occlusion - Terms
! Centric Holding Area:
! Area where supporting cusps are cradled when they are in the ____
! The inner aspect of the two ____ come together into contact and support the occlusion here
Specifically where the ____ comes into contact with the central fossa of the mandibular area. Supporting VDO.
maximal intercuspal position (MIP)
supporting cusps
maxillary palatal cusps
Occlusion - Terms
! Outer aspect:
! Area from ____ toward ____
on buccal cusps
! Area from ____ toward ____ on lingual cusps
! Fuctional Outer aspect (FOA):
! Outer aspect of functional cusps that sits in the opposite ____
! Area from cusp tip toward cheek on ____ teeth
! Area from cusp tip toward palate on ____ teeth
! About ____ wide
Outer aspects are found on both ____ and ____ cusps; but they are particularly important for the supporting cusps & are utilized in functional occlusion; thus, these are called functional outer aspects.
• FOC’s help guide into a ____ movement
cusp tip
cheek
cusp tip
palate
guiding inclines
mandibular
maxillary teeth
1mm
functional
non-functional
Occlusion - Terms
! Fuctional Outer aspect (FOA):
! Also on the mandibular ____
teeth
! ____ band facial to the incisal edge
◦Maxillary lingual surfaces of the CI and the canines - they are guiding inclines. They help guide our mandible forward in protrusion & canines help move laterally.
◦No ____ area on anterior teeth.
◦Guiding incline of non supporting; ____ on supporting cusps (mandibular buccal, maxillary
palatal)
anterior
1 mm
centric holding
FOA
Occlusion - Terms
! ____:
! Imaginary line drawn from the distal of the third molar to mesial of the first premolar through the central fossa of all the posterior teeth.
! ____:
! Imaginary line drawn from the distal of the third molar to mesial of the first premolar along the buccal cusps and buccal cusp ridges of all the posterior teeth.
There is a buccal occlusal line on both ____.
But in occlusion, only the buccal occlusal line on the ____really matters because those are the supporting cusps.
central fossa line
buccal occlusal line
arches
mandibular
Occlusion - Terms
! ____:
! Imaginary line drawn from the distal of the third molar to mesial of the first premolar along the lingual cusps and lingual cusp ridges of all the posterior teeth.
There is a lingual occlusal line on both ____; however, for the sake of occlusion, the lingual occlusal line on the ____ teeth only matter because those are the functional cusps.
lingual occlusal line
arches
maxillary
Occlusion - 3 rules
! 1. The ____ occlusal line angle of the ____ teeth rest in the central fossa line of the maxillary teeth
! 2. The ____ occlusal line angle of the ____ teeth rest in the central fossa line of the mandibular teeth
Rule 1 & 2 concerns “where do the buccal lingual cusps sit?”
They don’t ONLY sit in the central fossa area; but along that line.
buccal
mandibular
lingual
maxillary
Occlusion - 3 rules
! 3. The supporting cusp tips rest in marginal ridge areas along the central fossa line EXCEPT the ____ cusp tips of the maxillary molars and the ____ cusp tips of the mandibular molars.
Rule 3 is “where do the cusps specifically sit?”
• All supporting cusps sit on the ____ on the opposing
arch on the marginal ridges.
◦EXCEPT for the ____ cusps of the maxillary molars & the ____
of the mandibular cusps: they still sit along the central fossa line, but specifically in the ____.
ML DB central fossa line ML DB central fossa area
Occlusion - Rules
! If rules #1 and #2 are correct:
! ____ landmarks of occlusion are correct
! Good support of the Vertical Dimension of Occlusion (VDO, OVD)
! Forces of occlusion are directed along the ____ of the teeth (teeth function best when this is the case)
- B/L landmarks = seen with articulating paper. Given with Rule 1, 2, 3 - see future lectures (and lab manual for exact locations).
- Patient may be in pain if rules ____ are not correct (bc forces of occlusion are hitting badly)
B/L
long axis
1 and 2
Occlusion - Rules
! If rule #3 is correct: ! ____ landmarks of
occlusion are correct
! Allows ____ of the jaws without the cusps interfering with each other during this movement
M/D
lateral excursions
Functional Occlusion:
! The occlusal contacts of the maxillary and mandibular teeth during ____ (speech, mastication, and swallowing)
function
