Lec 9 - Facebow Flashcards

1
Q

IMPORTANT: function of the facebow is to relate the blank cast to the tmj

A

maxillary

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2
Q

facebow is for fabricating accurate dental restorations based on articulator movements that blank mandibular movements

A

RESEMBLE, NOT REPLICATE

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3
Q

reference planes/axes for facebow

A

axis orbital plane, frankfort plane

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4
Q

semi adjustable articulators like the ones we have wont allow us to find the exact location of the blank

A

hinge axis

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5
Q

arbitrary fascia point located 13 mm anterior to the posterior margin of the tragus on a line from the center of the tragus to the outer canthus of the eye

A

beyron’s

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6
Q

arbitrary fascia point located 10 mm anterior to the posterior margin of the tragus on a line from the center of the tragus to the outer canthus of the eye

A

gysi’s

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7
Q

estimated hinge axis is found by using this plane as a reference and uses a blank bow ear insert

A

frankfort Po-O, spring

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8
Q

hole on the articulator is offset by this much from the estimated hinge axis ear piece

A

10 mm

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9
Q

this is a geometric determination of errors resulting from arbitrary hinge axis location

A

weinberg

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10
Q

weinberg terminal hinge axis 5 mm too far posterior and a 3mm thick record produces an error of blank at the second molar during occlusion

A

.2 mm

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11
Q

provides orientation for maxillary arch with patient’s condyles

A

facebow transfer

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12
Q

spring bow goes here

A

in patient’s ears

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13
Q

sm facebow goes here

A

arbitrary points on face like gysi’s and beyron’s

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14
Q

red cake modeling plastic is used on the blank to get indentations of the teeth in the facebow

A

bite fork

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15
Q

condylar guidance should be set at blank

A

30 degrees

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16
Q

bennett guide should be set at blank

A

15 degrees

17
Q

incisal table should be set at blank

A

0 degrees

18
Q

percent of patients who don’t close jaws at centric relation position

A

90

19
Q

diagnostic casts should always be mounted at this position

A

centric relation in relaxed state

20
Q

determine centric relation by moving chin blank

A

downward and backward