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ORTHO I > lecture 3 > Flashcards

lecture 3 Flashcards

1
Q

sequence of dentition development

A

32 teeth by 18 if 3rd molars present

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2
Q

timing of eruption in max primary dentition

A

months

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3
Q

lower primary arch eruption times

A

months

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4
Q

overall time frame of primary eruption

A

8-29 months

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5
Q

what if primary dentition erupts late

A

entire eruption pattern will shift back, this also causes late eruption of the secondary dentition

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6
Q

1 vs 2 color

A

1 dentition more opaque/white
2 is more translucent/less opaque

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7
Q

1 vs 2 symmetry

A

1 crowns are symmetrical M/D, 2 are not

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8
Q

interdental spacing of 1 dentition

A

should be present to allow larger 2 teeth to erupt, especially in the anterior
may not be present in psoterior

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9
Q

primate space

A

Larger spaces called “ primate” spaces are found mesial to upper cuspids and distal to lower cuspids

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10
Q

what if there is no interdental spacing in the 1 dentition?

A

IF THERE IS NO INTERDENTAL SPACING
IN THE DECIDUOUS DENTITION, CROWDING OF
THE PERMANENT DENTITION WILL MOST
PROBABLY OCCUR ( Probability 75%).

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11
Q

2 Lower anteriors erupt where relative to 1

results?

A

lingual=can decrease arch length causing crowding

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12
Q

when there is crowding due to 2 lower I eruption what should you do right away?

A

may not intervene right away, interarch D may increase with age and correct this

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13
Q

can ectopic eruption happen with interdental spacing

A

Even if interdental spacing is present, permanent teeth may still erupt ectopically. In this case, abnormal root resorption pattern may occur

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14
Q

abnormal root resorb

A

can occur with ectopic eruption leading to failure of 1 exfoliation

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15
Q

what could be happening here?

what could happen?

A

abnormal root resorb due to lingual eruption of the 2 dentition
B aspect of the 1 root may still be intact allowing tooth to remain
more teeth may erupt and cause further crowding or 1 could exfoliate and tongue may push 2 teeth outward

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16
Q

what if 1 teeth show crowding

A

If there is crowding in the primary dentition, severe crowding will most probably occur in the permanent dentition, almost always

17
Q

what to do with 1 crowded teeth?

A

tx asap (expansion?)

18
Q

Diastemas between anterior primary teeth are important for?

A

Diastemas between anterior primary teeth are important to get space for permanent incisor eruption

19
Q

Upper and lower I eruption locations

A

*The upper incisors erupt to the labial of primary teeth.
Lower incisors tend to erupt to the lingual.

20
Q

does arch size increase with 2 incisor eruptions

A

There is no significant increase in arch size after the eruption

21
Q

angulation of 1 incisors

A

none

22
Q

what 1 tooth is larger than the 2

A

2nd 1 M> 2nd PM

23
Q

Example of significant size differences between 1 and 2 dentition

A
24
Q

how can PM eruption be affected?

A

M drift of molars

25
Q

Occlusal plane (OP)

A

*An imaginary surface that passes through the occlusion of the teeth. This surface usually is curved and is, strictly speaking, not a plane, but commonly is approximated by one (straight line in the lateral view), based on specific reference points with in the dental arches. The maxillary occlusal plane passes through the occlusal cusps of the posterior teeth and the incisal edges of the maxillary incisors. The mandibular occlusal plane is tangent to the occlusal cusps of the posterior teeth and the incisal edges of the mandibular incisors.

26
Q

1 tooth position to OP

A

Primary teeth are positioned 90 degrees to the occlusal plane

27
Q

curve of spee

A

The curve displayed in the sagittal plane (or rather, in a
plane parallel with the body of the mandible on either
side) by the cusps and incisal edges of the mandibular
teeth.

28
Q

curve of spee in 1 dentition

A

flat

29
Q

1 dentition occlusal relations variability

A

Less variability in occlusal relations than in the permanent dentition
1. Dentoalveolar compensations: (response of the dentoalveolar process to the skeletal dysplasia or to functional disturbance) are not fully expressed

30
Q

malocclusion diagnosed in 1 dentition, result with growth?

A

will get worse

31
Q

a 1 malocclusion os often what in regards to etiology

A

skeletal, hard for 1 to compensate with this

32
Q

1 dentition occlusal relations

upper/lower I
overbite/jet
upper C tip

A
  1. Upper and lower incisors are vertical
  2. Minimal overbite and overjet
  3. Upper canine tip is positioned in the embrasure between the lower canine and the first primary molar

ORTHO I (9 decks)

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