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Part II > Ortho/Pedo > Flashcards

Ortho/Pedo Flashcards

1
Q

A moment is ……

A

measure of tendency to rotate around the center of resistance

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2
Q

The only force possible with a couple is …….

A

rotation around the center of resistance

* Regardless of where the couple (bracket) is applied

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3
Q

Functional appliance are used to ………

A

correct class II malocclusion

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4
Q

Head gear provides both

A

anchorage and traction

* It modifies the growth of the maxilla

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5
Q

Endodontically treated teeth are subject to ……. when moved endodontically

A

root resorption

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6
Q

Hyrax differs from Haas appliance in that Hyrax …….

A

doesn’t have an acrylic base
* Note: Haas has two bands, one on the first premolar, the second on the first molar on each side. While Hyrax has on band on the first molar only

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7
Q

Unlike functional cross bite, skeletal cross bite shows …….

A

smooth closure to centric occlusion

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8
Q

Class III malocclusion is more common in ………

A

asians

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9
Q

In orthodontic treatment planning, the priorities are …..

A

impacted teeth first, then interarch relation, followed by intra arch relation

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10
Q

A flat mandibular plane angle indicates ………., while a steep plane angle indicates ……..

A

short anterior face with anterior deep bite

long anterior face with anterior open bite

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11
Q

Normal maxillary/mandibular plane angle value is …….

A

27 ( +/- 4 )

* Greater value indicates longer lower anterior face height

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12
Q

Longer face predisposes the patient to …….., while short face ……..

A

CL II

CL III

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13
Q

Cephalometric is useful for assessing …….

A

bone-bone, tooth-tooth, and tooth-bone relationship

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14
Q

Supracrestal fibrotomy is most commonly performed on ………

A

Max. lateral incisors

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15
Q

Time elapsed between the extractions of serial exo is ……..

A

6-15 months

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16
Q

Full time retention after ortho treatment should last for ……..

A

4 months

* after that, a 1 year partial time retention is preferred

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17
Q

Lymphoid tissue reaches %200 size at age …., then declines. Major tissues reach their max at ….., while genital tissue starts growth at ……..

A

12
20
14
* Note: Neural tissue reaches %90 size at age 9

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18
Q

The growth of the Maxilla follows the growth of ……, while the Mandible growth follows ……..

A

the neural tissue
gential tissue
* Peak of growth for girls is 12, and boys 14
* The earlier the growth peak, the shorter the growth period, and the less the growth

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19
Q

The clefting of lip/palate prevalence is …

A

1 of 700 - 1000 births

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20
Q

Permanent teeth move …….. & …….. while erupting

A

occlusaly and buccaly

21
Q

Light ortho forces causes …….

A

frontal resorption, and faster movement

22
Q

The premature loss of mand. primary canines indicates …….

A

insufficient arch size in the anterior region

* Crowns of permanent lateral incisor impinge on the roots of the primary canines, causing their resorption

23
Q

Malocclusion is more identifiable at the age of ……….. due to ………

A

7 - 9 years

due to eruption of incisors, which reveal the arch - tooth size discrepancy

24
Q

The nasolabial angle is …..

A

the angle between the base of the nose and the upper lip. Should be perpendicular or obtuse

25
Q

SN - GoGn angle mean is ……

A

32.0

26
Q

Bimaxillary dentoalveolar protrusion appears as …..

A

incompetent lips
lips strain
prominent lips in the profile view

27
Q

Thumb sucking, if stopped before mixed dentition, will ……

A

not lead to malocclusion

28
Q

Mand. primary second molar erupts in ….. in relation to its Max. counter part

A

flush-terminal relation

* The mand. second molar is larger M-D than its upper counterpart

29
Q

Late mesial shift occurs at the age of …….

A

10 years

* CL II relationship will occur if late shift doesnt occur

30
Q

Leeway space is …. in the Max. and …. in the Mand.

A

3
5
* Measured for primary canine, first & second molar

31
Q

There’s an increase in vertical face height in girls at age ……

A

17

* for boys at 20

32
Q

There’s a DECREASE in arch length during the late adolescent due to …..

A

late mesial shift of molars into leeway space

33
Q

N2O in excess of ….. is contraindicated in pedo dentistry

A

50%

* Note: O2 must be 30% minimum

34
Q

…….. is the most commonly used premed prior to GA

A

versed

35
Q

MAC for N2O is ……

A

104%

* It is the concentration needed to produce immobility in 50% of patients

36
Q

Ectodermal dysplasia is …..

A

sex linked recessive

* more in males

37
Q

Most common solid tumors of childhood is ……

A

neuroblastoma

  • originates in the adrenal medulla or other sites of the sympathetic system
  • Most common site is the abdomen
38
Q

The …… arch is underdevloped in pituitary dwarvism

A

mandible

39
Q

ADHD is treated with ……

A

ritalin, concerta, adderall

40
Q

In low conc., fluoride inhibits …..

A

glucosyltransferase & intracellular polysaccharides formation

41
Q

Cause of death from fluoride toxicity is ……

A

heart failure and respiratory paralysis

42
Q

Most commonly missed primary tooth is ……

A

maxillary lateral incisor

43
Q

Cementum is …….. in children

A

thinner

  • Cementum thickness increases with age
  • Also in children: wider PDL, flatter alveolar crest, greater pocket depths, less attached gingiva
44
Q

………. has a large mesial marginal ridge that resembles a cusp

A

Primary mand. first molar

  • also has a large transverse ridge from MB to ML
  • Has a distinctive occlusal pattern “H”
45
Q

Formocresol can be diluted to …… of original for pulpotomy

A

20% strength

* other fixative agents: ferric sulfate and gluteraldehyde

46
Q

What is the treatment for a primary tooth with necrotic pulp after trauma (no fracture)?

A

RCT if necessary (symptomatic) otherwise, leave it alone

47
Q

Interglobular dentin is found in ……..

A

dentin near the DEJ

  • It is less mineralized than globular dentin
  • Evident especially when there’s a disturbance in calcification (like Dentinogenesis imperfecta)
48
Q

Finger spring can be used with ……. appliance to close maxillary diastema

A

Hawley arch

49
Q

The intersphenoidal synchondrosis becomes inactive at age …….

A

3 yrs

* The sphenoethmoidal stops at age 7

Part II (6 decks)

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