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65 Cards in this Set
- Front
- Back
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What term is used to define the influence on mandibular movement provided by the contact between the anterior teeth as the mandible moves through excursive movements?
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anterior guidance
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Anterior teeth are inclined to the (labial/lingual) approximately __-__ degrees
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labial, 12-28 degrees
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How many grams of force can be applied to the anterior teeth before you notice? Posterior?
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1, 10
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Condylar guidance has greater influence on teeth (anterior/posterior) to the premolars, whereas anterior guidance has the greatest influence on teeth (anterior/posterior) to the premolars
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posterior, anterior
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Vertical overlap is known as (overjet/overbite)
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overbite
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Horizontal overlap is known as (overjet/overbite)
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overjet
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An increased horizontal overlap necessitates (shorter/taller) cusps on posterior teeth
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shorter
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An increased horizontal overlap necessitates (shallower/deeper) grooves on posterior teeth
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shallower
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A decreased horizontal overlap accommodates (shorter/taller) cusps on posterior teeth
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taller
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A decreased horizontal overlap accommodates (shallower/deeper) grooves on posterior teeth
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deeper
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With (increased/decreased) horizontal overlap, a change in the teeth is a necessity
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increased
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A decreased vertical overlap necessitates (shorter/taller) cusps on posterior teeth
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shorter
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A decreased vertical overlap necessitates (deeper/shallower) grooves on posterior teeth
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shallower
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An increased vertical overlap accommodates (shorter/taller) cusps on posterior teeth
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taller
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An increased vertical overlap accommodates (deeper/shallower) grooves on posterior teeth
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deeper
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If you have a(n) (increased/decreased) vertical overlap, specific tooth change is a NECESSITY
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decreased (must have shorter cusps, shallower grooves)
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The protrusive path is measured in degrees from ___ reference plane
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horizontal
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The protrusive path ranges from __-__ degrees in humans, with a median of ___
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25-70, 40
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Protrusive path is also known by what 2 other names?
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1. Angle of Eminence
2. condylar inclination (CI) |
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(Steep/flat) condylar inclination produces rapid disclusion
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steep
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(Steep/flat) condylar inclination means long cusps and deep fossae are acceptable
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Steep
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(Steep/flat) condylar inclination REQUIRES short cusps and shallow fossae on posterior teeth
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flat
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A flat condylar inclination REQUIRES (short/tall) cusps and (shallow/deep) fossae on posterior teeth
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short, shallow
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Lateral excursion path ranges from __-__ in humans, with a median of __-__
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25-75, 45-55
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In laterotrusive movements, the cusp pathway is (transversely/obliquely) directed
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transversely
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In mediotrusive movements, the cusp pathway is (transversely/obliquely) directed
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obliquely
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True or False, in protrusive movement, cusps slide inside the fossa of the opposing arch the entire way
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False! They run parallel so that cusps are hitting, the protrusive movement does NOT guide cusps along the arch, rather straight forward (this is pretty "duh" but he made a point of this)
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What are the 3 anatomical determinants of mandibular movement
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R TMJ, L TMJ, occlusion of teeth
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The neuromuscular system is considered a(n) (anatomical/physiological) component of mandibular movement
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physiological
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The (posterior/anterior) teeth control guidance of the mandible, whereas the (posterior/anterior) teeth determine it's superior closing movement
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anterior, posterior
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The TMJ determines how the (anterior/posterior) teeth behave, whereas the anterior guidance determines how the (anterior/posterior) teeth behave
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posterior, anterior
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True or False, there is a gradient of control, from TMJ in the posterior to AG (anterior guidance) in the anterior
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True
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True or False, teeth are either controlled by TMJ or AG, never both
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False, TMJ has more influence in the posterior and AG more in the anterior, but in the middle, these influences overlap
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*What are the 7 requirements of optimum occlusion?
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1. Both the right and left condyles are in a supero-anterior position in fossae.
2. The articular disc is properly interposed. 3. There is even and simultaneous contact of all teeth. 4. Lighter contacts occur on the anterior teeth than on the posterior. 5. Occlusal forces are directed down long axis of teeth. 6. During laterotrusive movement, the mediotrusive side is discluded immediately. 7. During protrusive movement, all the posterior teeth are discluded immediately. |
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Anterior teeth are inclined to the labial about how many degrees?
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12-28 degrees
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True or False, if the maxillary anterior teeth are straight up and down, it will be difficult for the mandible to slide forward in protrusive movement
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True
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Mandibular incisal tables function against maxillary ___ in anterior guidance
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marginal ridges
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True or False, the canine has extra enamel to stand up to the pressures of jaw movement
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True
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The mandibular canine slides against what part of the maxillary canine?
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central area
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True or False, canine pulp mimics canine tooth anatomy
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FALSE! In the canine, the pulp is much smaller and does not mimic the overall shape; this allows for more of the canine to be made up of dentin for strength
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What is the area of reinforced bone around the maxillary canine called? Why is it there?
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canine eminence; to give canine more support
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Anterior teeth have (1 tenth/half/double/10x) the proprioception of posterior teeth
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10x
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If the anterior teeth are worn and cannot guide the occlusion, what then guides the occlusion?
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posterior teeth
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With a flat condylar inclination, you get (more/less) separation of the mandible
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less
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Name the big 4 reason that people have TMJ issues
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1. skeletal anterior open bite
2. >2mm discrepancy between CR and ICP 3. overjet >4mm 4. 5 or more missing and unreplaced posterior teeth |
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An overjet >__mm can cause TMJ issues
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4mm
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A discrepancy between CR and ICP of >__mm can cause TMJ issues
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2mm
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How many of the big 4 rules of TMJ issues have to do with anterior guidance?
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3 of 4
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How many of the big 4 rules of TMJ issues have to do with anterior guidance?
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3 of 4
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Which of the big 4 rules of TMJ issues does NOT have to do with anterior guidance?
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5 or more unreplaced posterior teeth
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Which of the big 4 rules of TMJ issues does NOT have to do with anterior guidance?
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5 or more unreplaced posterior teeth
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__ (#) or more unreplaced posterior teeth can lead to TMJ issues
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5
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Skeletal (open/closed) bite has been linked to TMJ issues
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open
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__ (#) or more unreplaced posterior teeth can lead to TMJ issues
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5
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The steeper the condylar pathway, the (taller/shorter) the cusps and (deeper/shallower) the fossae MAY be
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taller, deeper
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Skeletal (open/closed) bite has been linked to TMJ issues
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open
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The steeper the condylar pathway, the (taller/shorter) the cusps and (deeper/shallower) the fossae MAY be
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taller, deeper
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The flatter the condylar pathway, the (taller/shorter) the cusps and (deeper/shallower) the fossae MUST be
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shorter, shallower
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A (steep/flat) condyle necessitates a more specific tooth anatomy
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flat (MUST have shorter cusps and shallower fossae)
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Mandibular lateral translation movement is also called what?
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Bennett Movement
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Immediate side shift is typically __-__mm with a median of __mm
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0-3, 1
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Progressive side shift is typically __-__ degrees with a median of __ degrees
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5-9, 7
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(Immediate/progressive) side shift does NOT typically change from person to person
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progressive
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Side shift is determined by the (orbiting/rotating) condyle
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orbiting
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Progressive side shift is measured from a line (perpendicular/parallel) to the midline
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parallel
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