seminar notes Flashcards

1
Q

if a crossbite has associated displacement what is the likely aetiology

A

dental aetiology
if skeletal discrepancy likely wont displace but asymmetry may be present

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2
Q

how does digit sucking result in uni lateral crossbite or small maxillary arch

A

when sucking digits tongue depresses so buccinator and masseter forces left unopposed , this is paired with negative intra oral pressure from sucking motion

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3
Q

will dummies affect permanent dentition

A

no as almost always stopped by 4/5 years old

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4
Q

what appliances may be given to stop a digit sucking habit

A

removable appliance - wth goal post
fixed appliance - with tongue rake

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5
Q

name 3 potential aetiologies of an anterior open bite

A

tongue thrust
digit sucking
skeletal pattern

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6
Q

what age does the mid palatal suture close

A

around age 14 (think RME)

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7
Q

what permament teeth would a 9 year old typically have

A

all 1st molars
all upper and lower incisors

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8
Q

do you need to compensate deciduous teeth extractions

A

no - none

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9
Q

extraction of what tooth may require a balancing extraction

A

Cs

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10
Q

what should be done if a child with hypodontia comes into your practice

A

refer

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11
Q

name 3 potential reasons for a midline diastema

A

unerupted supernumerary
hypodontia
generalised spacing
arch - toothsize discrepancy

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12
Q

dens in dente

A

invagination of pulp
as soon as tooth erupts will be communication between oral cavity and pulp - poor prognosis tooth

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13
Q

what two radiograph combinations can be done for parallax

A

horizontal - 2 PAs
vertical - OPT and maxillary occlusal

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14
Q

aetiology of unerupted canines (4)

A
  • long path of eruption
  • genetic links
  • crowding
  • ectopic position of tooth germ
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15
Q

when should ectopic canines be surgically removed

A
  • no suitable path of traction to bring it into arch
  • signs of early damage to lateral incisor
  • patient doesnt want active treatment
  • good long term prognosis of Cs (if retained)
  • 2 and 4 contact present
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16
Q

what does a full unit class II molar relationship look like

A

mesial cusp of upper 6 in embrasure of lower 5 and 6

17
Q

most common cause of dilaceration

A

trauma to deciduous tooth causing it to become intruded and bump crown of developing permanent tooth

18
Q

aetiology of UEMI (4)

A

supernumerary
trauma
early loss of primary tooth
crowding
downs syndrome
ectopic position of tooth germ