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Occlusion > Alignment and occlusion (complete) > Flashcards

Alignment and occlusion (complete) Flashcards

1
Q

What things are found on the occlusal surface of the teeth

A

cusps
cusp ridges
grooves
sulci

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2
Q

What percentage of the total buccolingual dimension of the tooth does the occlusal table occupy

A

the occlusal table takes up 50-60% of the total buccolingual dimension of the tooth

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3
Q

to which part of the tooth are the mastication forces applied

A

the occlusal table

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4
Q

what are the buccal and lingual ends of the occlusal table

A

the buccal and lingual cusp tips

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5
Q

Where should the occlusal table be positioned, to give the tooth the most strength

A

it should be positioned within the confines of the root

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6
Q

What is the Bucco-occlusal line

A

a line drawn through the buccal cusps of the mandibular posterior teeth

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7
Q

Is the Bucco-occlusal line smooth and continuous, or does the location of some of the buccal cusps make it not so straight and continuous

A

it is straight and continuous

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8
Q

between what two things does the bucco-occlusal line create a division?

A

it creates a division between the inner and outer apspects of the mandibular centric cusps

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9
Q

which cusps are the mandibular centric cusps

A

the buccal cusps

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10
Q

which cusps are the maxillary centric cusps

A

the lingual cusps

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11
Q

What is the Linguo-occlusal line

A

a line drawn through the lingual cusps of the maxillary posterior teeth

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12
Q

is the linguo-occlusal line smooth and continuous

A

yes

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13
Q

between what two things does the linguo-occlusal line create a division

A

between the inner and outer aspects of the maxillary centric cusps

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14
Q

What is the Central fossa line

A

a continuous line drawn through the central developmental grooves of the maxillary and mandibular posterior teeth

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15
Q

what opposes the bucco-occlusal line

A

the central fossa line of the maxillary posterior teeth

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16
Q

what opposes the linguo-occlusal line

A

the central fossa line of the mandibular posterior teeth

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17
Q

What is another name for the mesial and distal inclines of cusps

A

mesial and distal cusp ridges

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18
Q

What is inclination

A

it describes the relative position of the root to crown, or crown to root, in the facio-lingual dimension

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19
Q

what does it mean when a tooth has a facial crown inclination

A

that the crown of the tooth is located facial to the root. (crown is facial root is lingual)

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20
Q

What does it mean when a tooth has a lingual root inclination

A

that the root of the tooth is located lingual to the crown of the tooth (root is lingual, crown is facial)

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21
Q

What is angulation

A

a description of the relative position of the crown to root, or root to crown, in the mesial-distal dimension

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22
Q

Which teeth have mesial crown angulation

A

all teeth

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23
Q

which teeth have distal root angulation

A

all teeth (the same thing as mesial crown angulation)

24
Q

Which teeth have facial crown inclination

A

the central and lateral incisors of both arches

25
Q

which teeth have no inclination

A

the canines and premolars

26
Q

which teeth have a buccal crown inclination

A

maxillary molars

27
Q

which teeth have a lingual crown inclination

A

mandibular molars

28
Q

Why is it important to understand root angulation

A
  1. aids in aiming X-rays for better projections
  2. helps relate the direction of occlusal forces in restorations along the long axis of the tooth
  3. guides the control of orthodontic forces for proper tooth angulations
  4. aids in using dental implant templates with correct angulation
29
Q

What is the height of contour

A

the greatest elevation of the tooth (the “belly” of the tooth)

30
Q

What is the rule for the mesial and distal heights of contour of anterior teeth

A

The mesial height of contour is more incisal/occlusal than the distal height of contour

31
Q

what is an exception to the rule for the mesial and distal heights of contour for anterior teeth

A

the mandibular central incisor. its mesial and distal heights of contour are located in the same place incisocervically

32
Q

What is the rule for the mesial and distal heights of contour of posterior teeth

A

both mesial and distal heights of contour are in the middle third

33
Q

what is an exception to the rule for the mesial and distal heights of contour of posterior teeth

A

mandibular premolars and possibly mandibular molars

34
Q

What is the rule for the facial height of contour for all teeth

A

the facial height of contour is located in the cervical third on all teeth

35
Q

What is the rule for the lingual height of contour for anterior teeth

A

it is in the cervical third of anterior teeth

36
Q

what is the rule for the lingual height of contour for the posterior teeth

A

it is in the middle third of the posterior teeth (Except the mandibular first premolar, it is in the junction between the cervical and middle third

37
Q

which teeth have facial and lingual heights of contour with a convexity of 1mm instead of the usual .5mm

A

the mandibular posterior teeth

38
Q

what are the mesial and distal heights of contour for the maxillary teeth

A

IJ, JM, JM, MM, MM, MM, MM, MM

39
Q

What are the mesial and distal heights of contour for the mandibular teeth

A

II, II, IM, MM, JJ, JM, MM, MM

40
Q

What is the widest part of the tooth interproximally

A

the contact areas

41
Q

does the contact area match up with the mesial and distal heights of contour of a tooth

A

yes (except if the teeth are touching, then there is no contact point, but still heights of contour)

42
Q

what are the two dimensions of a contact are

A

incisocervical and faciolingual

43
Q

what are the functions of contact areas

A
  1. stabilize the arch
  2. prevent food impaction
  3. protect interproximal gingiva
44
Q

What happens to contact areas with age

A
  1. the area increases with age due to extrusion, tipping, wear
  2. it becomes more cervical from anterior to posterior
45
Q

where are the contact points located on anterior teeth

A

They are centered faciolingually

46
Q

Where are the contact points located on posterior teeth

A

more towards the buccal

47
Q

why is it important that the contact points of posterior teeth are more towards the buccal than the lingual

A

it creates an area for food to escape = sluiceway?

48
Q

What are different embrasures

A
  1. lingual embrasure
  2. buccal/facial embrasure
  3. incisal/occlusal embrasure
  4. gingival/cervical embrasure
49
Q

is the buccal or lingual embrasure larger

A

the buccal embrasure’s area is larger

50
Q

is the buccal or lingual embrasure wider

A

the lingual embrasure is wider

51
Q

where is the interproximal contact in relation to the CF line (central fossa line)

A

the interproximal contact is located buccal to the CF line

52
Q

how much of the Buccolingual distance does the contact area occupy

A

the contact area occupies 1/3 of the total buccolingual distance

53
Q

What surrounds the contact area

A

the 4 embrasures

54
Q

what is the purpose of embrasures

A
  1. provide a spillway for food during mastication

2. prevents food from being forced through the contact area

55
Q

which embrasure is usually larger, the lingual or the buccal

A

the lingual (there is a discrepency in her slides. one says this, the other says that the buccal has more area)

Occlusion (7 decks)

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