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Occlusion > Static Factors of Occlusion > Flashcards

Static Factors of Occlusion Flashcards

1
Q

ALIGNMENT AND OCCLUSION

OF THE DENTITION (3)

A

►FACTORS AND FORCES THAT
DETERMINE THE TOOTH POSITION
►INTRA-ARCH ALIGNMENT
►INTER-ARCH ALIGNMENT

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2
Q

FACTORS AND FORCES THAT
DETERMINE THE TOOTH
POSITION (3)

A

►labiolingual alignment
►mesiodistral alignment
►vertical position

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3
Q

tooth posiiton (3)

A

muscles
genetic
habits

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4
Q

tooth position:

muscles (2)

A
  • cheeks, lips, and tongue

- neutral zone

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5
Q

tooth position:

genetic

A

-size and shape of arch and teeth = available space

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6
Q

tooth posiiton (3)

A

muscles
genetic
habits

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7
Q

tooth posiiton (3)

A

muscles
genetic
habits

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8
Q

tooth posiiton (3)

A

muscles
genetic
habits

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9
Q

tooth position

inter proximal contacts (2)

A
  • maintain tooth position

- mesial drift: alveolar bone nd gingival fibers

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10
Q

tooth position

occlusal contacts

A

-maintain tooth position

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11
Q

ALIGNMENT AND OCCLUSION

OF THE DENTITION (3)

A
  • factors and forces that determine the tooth position
  • intra arch alignment
  • inter arch alignment
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12
Q

intra arch tooth alignment

A

the relationship of the teeth to each other within the dental arch

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13
Q

plane of occlusion

A

plane that curves to fit the occlusal surfaces and incisal edges of all the teeth

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14
Q

plane of occlusion

not

A

flat

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15
Q

plane of occlusion

teeth positioned in the arches at

A

varying degrees of inclination

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16
Q

plane of occlusion

  • – on the mandible
  • – on the maxilla
A

concave

convex

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17
Q

angulation of the teeth is deterred by the

A

long axis of the tooth (crown and root)

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18
Q

angulation of the tooth in the (2) plane

A

sagittal

frontal

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19
Q 
ANGULATION OF MANDIBULAR TEETH
SAGITAL PLANE
anterior teeth:
premolars:
molars:
A 
labially inclined (20 deg)
medially inclined (6 deg)
medially inclined (10-15 deg)
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20
Q 
ANGULATION OF MAXILLARY TEETH 
SAGITTAL PLANE
anterior teeth:
premolars:
molars:
A 
labially inclined- central incisor greatest (28 deg)
medially inclined (9 deg)
medially inclined (13 deg)- crown of the maxillary molars are tilted distally (and labially)
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21
Q 
ANGULATION OF MANDIBULAR 
TEETH FRONTAL PLANE
anterior teeth:
premolars:
molars:
A

vertical inclination (0 deg)
1st pre- labial inclination (9 deg)
2nd pre- lingual inclination (9 deg)
lingual inclination (20 deg)

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22
Q 
ANGULATION OF MAXILLARY TEETH
FRONTAL PLANE
anterior teeth:
premolars:
molars:
A

incisors: distal inclination (2-6 deg)
canines: mesial inclination (17 deg)
slight buccal inclination (5 deg)
buccal inclination (20 deg)

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23
Q

CURVE OF SPEE (2)

A
  • antero-posterior curvature of the occlusal plane

- concave in the mandible, convex in the maxilla

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24
Q

CURVE OF WILSON (2)

A
  • medio-lateral curvature of the occlusal plane

- concave in the mandible, convex in the maxilla

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25
Q

posterior teeth

when they occlude, they are loaded

A

axially

26
Q

posterior teeth are designed to take

A

heavy loads,

support the occlusal vertical dimension

27
Q

anterior teeth

when they occlude,

A

they are not loaded through their long axis

28
Q

anterior teeth are not designed for

A

loading

29
Q

occlusal table

A

the area defined by the cusp tips and the mesial and distal cusp ridges/arms

30
Q

occlusal table is the –% of the buccolingual width of the tooth

A

50-60

31
Q

occlusal table facilitates

A

axial loading

32
Q

INNER INCLINES

A

inclines inside the buccal and lingual cusp ridges

33
Q

OUTER INCLINES

A

inclines outside the buccal and lingual cusp ridges

34
Q

alignment and occlusion of the dentition

A

forces and factors the determined he tooth position

  • intraarch alignment
  • inerarch alignment
35
Q

NTER-ARCH TOOTH ALIGNMENT

A

THE RELATIONSHIP OF THE TEETH IN
ONE ARCH TO THOSE IN THE OTHER
ARCH

36
Q

arch shape and size (2)

A
  • u shaped/square/tapering

- symmettrical, smooth in outline

37
Q

►ARCH WIDTH:

►ARCH LENGTH:

A

maxillary is wider
maxillary arch is longer
max: 128 mm long
mand: 126 mm long

38
Q

NET EFFECT OF NORMAL ARCH

WIDTH (2)

A
  • the buccal cusps of mandibular posterior teeth and the lingual cusps of maxillary posterior teeth occlude with the opposing central fossa areas
  • minimize trauma to soft tissue
39
Q

supporting/centric functional/stamp cusps

A

lingual cusps of max teeth and buccal cusps of mand teeth

40
Q

guiding/non centric/balancing/shearing cusps

A

buccal cusps of max teeth and lingual cusps of mandibular teeth

41
Q

BO line

A

imaginary line drawn through the buccal cusp tips of the mand teeth

42
Q

LO line

A

imaginary line defined bt joining the lingual cusp tips of the max teeth

43
Q

CF line

A

imaginary line that follows the central grooves and fossa of all the posterior teeth

44
Q

the BO line of the mandible occludes in the

A

CF line of the max

45
Q

the LO line of the max occludes in the

A

CF of the mand

46
Q

cross bite (3)

A

the opposite of the ideal inter arch relationship
the BO line of the max occludes with the CF line of the mandible
the LO line fo the mand occludes with the CF line of the max

47
Q

define the relationship between the

A

max and mandibular first molars

48
Q

angles class 1 relationship is the

A

ideal occlusion from an orthodontic perspective

49
Q

MB CUSP OF THE MAXILLARY FIRST MOLAR

A

is aligned directly over the buccal groove of the man first molar

50
Q

MB CUSP OF THE MANDIBULAR FIRST MOLAR

A

occludes in the embrace area between the max second premolar and first molar

51
Q

ML CUSP OF THE MAXILLARY FIRST MOLAR

A

occludes in the central fossa area of the mandibular first molar

52
Q

MB CUSP OF THE MAXILLARY FIRST MOLAR

A

is situated over the embrasure between the mandibular second premolar and first molar

53
Q

MB CUSP OF THE MANDIBULAR FIRST MOLAR

A

occludes in the central fossa of the max first molar

54
Q

DL CUSP OF THE MAXILLARY FIRST MOLAR

A

occludes in central fossa of the mand first molar

55
Q

MB CUSP OF THE MAXILLARY FIRST MOLAR

A

is situated over the embrasure between the mand first and second molar

56
Q

DB CUSP OF THE MANDIBULAR FIRST MOLAR

A

occludes in the embrasure between distal marginal ridge of the max second premolar and the mesial marginal ridge of the max first molar

57
Q

ML CUSP OF THE MAXILLARY FIRST MOLAR

A

is situated in the mesial pit of the mand second molar

58
Q

VERTICAL OVERLAP (2)

A
  • distance the max anterior teeth overlap the and anterior teeth in a vertical direction
  • 2-4 mm is normal
59
Q

HORIZONTAL OVERLAP (2)

A

distance the max anterior teeth overlap the mand teeth when measured in a horizontal direction
-2-4 mm is normal

60
Q

CLASS II ANTERIOR TEETH

division 1

A

great vertical overlap, the man teeth contact the gingival third of the max anterior teeth (deep bite)

61
Q

CLASS II ANTERIOR TEETH

division 2

A

max incisors are lingually inclined, laterals overlap the centrals labially

62
Q

CLASS III ANTERIOR TOOTH RELATIOSHIP (2)

A
  • end-to-end relationship

- mand anterior teeth are so far forward overlapping max anterior teeth

Occlusion (15 decks)

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