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Orthodontics > Gateways Question > Flashcards

Gateways Question Flashcards

1
Q

2 reason why we may not be able to achieve Andrew’s 6 keys?

A
  • Size of tooth
  • Angulation / inclination of tooth
  • Underlying SK discrepancy
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2
Q

Angulation of tooth can be corrected by?

A
  • Repositing bracket
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3
Q

How to correct curve of spee?

A
  • Rocking chair- Revserse curve of spee
  • Bonding 7
  • URA bite plane
  • Bite turbos
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4
Q

Describe dento alveolar compensation and example?

A
  • Class II- Upper Retroclined lower Proclined
    Class III- Upper Proclined lower Retroclined
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5
Q

Once qualified list 2 things need to work?

A
  • GDC registration
  • Indemnity
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6
Q

Why scope of practice important

A

Because it describe skill and responsibilities of each role and if we do not follow we out patient in risk.

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7
Q

GDC registrant

A
  • Clincal dental technician
  • Dental hygienist
  • Dental nurse
  • Dental technician
  • Dental therapist
  • Orthdontic therapist
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8
Q

Infection virus

A
  • HEP B
  • HEP C
    HIV
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9
Q

List next stage after inocculation injury

A
  • Find hazard and remove it , encourage bleeding and rinse under tap water m. Do not stop bleeding under tap water for few seconds.
    Inform patient .
    Record in accident book
    Donor/ recipient 10ml blood
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10
Q

Name 2 condition of tooth abnormalities

A
  • Amelogenesis AI enamel abnormalities
  • MIH
  • Hypoplasia
  • Dentenogesis DI dentine abnormalities
  • Rubella- infection
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11
Q

Bracket breakages cause?

A
  • Patient factor- Poor OH, Diet,habit, poor attendance,trauma
  • Operator factor- Plaque poor removal,
    Less etching, poor moisture control, figgle with bracket and composite for long time. Less cure
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12
Q

What does etch do?

A
  • Expose enamel prisms, increase surface area to increase micro mechanical attachment.
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13
Q

Which Etch use for Porcelain crown?

A
  • Hydrofluoric acid 9%
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14
Q

Class II div 2 EO features?

A
  • Pronounce Go angle
  • Class II sk
  • Reduce FMPA angle
  • Pronounce chin point
  • Strong lower lip
  • Deep labiomental fold
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15
Q

Class II div 2 IO features

A
  • Retroclined upper central incisors
  • mesiolabial rotated
  • increased overbite
  • Gummy smile
  • Class II molar relationship
  • Broad maxilla
  • Scissor bite Tendency
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16
Q

3 methods of reducing an increase overbite?

A

Increase posterior facial growth
- Bite plane hold lower incisors and let buccal segment grown.
- Reverse curve of spee- Intrude and proline incisor and extrude molars.
- HG- Low pull - Extrude and distalise molars
High pull - Intrude and distalise molars
- Class II elastics - Extrude and Mesial upper incisor and extrude lower molar and Procline lower incisors.

17
Q

Why 2 reason study model use for?

A
  • Tx planing
  • PAR
18
Q

Anchorage loss how can you explain?

A

AP direction- Loss of Xtn space or Mesial movement of U6s.
Vertical- when High buccal canine to align (prevent with piggy back - palatal canine or ectopic canine or reduce overbite.
Transverse - ectopic canine with zing string with SS wire to protect arch form.

19
Q

What is round tripping?

A
  • When move root back and front again.
20
Q

How much space create by proclining lower incisor

A
  • 2mm than IPR
21
Q

4 orthodontic method increasing posterior anchorage

A
  • Bonding / Banding 7s
  • TPA/ Nance
  • HG
  • Take canine first then rest of set.
  • Class II elastics
22
Q

What are source of anchorage?

A
  • EO- Skeletal - back of head
  • IO- Skeletal, implant and TADs, simple, compound, reciprocal and Inter and maxillary Anchorage.
23
Q

TB mode of action?

A
  • posture mandible forward stretch soft tissue and force transferred to bone and teeth which cause dental and skeletal change.
    Sk effect - restrain maxilla 1mm
    Enchantment of mandible growth 1-2mm.
    Dentoalveolar effect - Reduce OJ , reduce overbite bilateral open bite and Class III molar relationship.
24
Q

What do you check prior debond?

A
  • Prescription / orthodontist happy with debond
  • Condent from parent and patient
  • Check no spaces and good interdigitagion.
25
Q

Risk of debond ?

A
  • handpiece can get hot if bur is not keep moving back and forth which can burn patient soft tissue and teeth can die.
  • Enamel scaring
  • Fracture of restoration
  • Inhalation or injection.
26
Q

How should clinical photograph stored?

A
  • Secured and password protected and access by clinical staff.
  • Backed up
27
Q

Types of retention

A
  • Removable retainers - VFR, Hawley
  • Fixed -Bonded retainer
28
Q

What is difference between crowding and displacement?

A
  • Crowding- How much mm needs to fit crowded teeth 4 ways to assess, visual, digital scan, brass wire and microscope.
    -Displacement - displacement of contact point of adjacent tooth
29
Q

HG traction and anchorage force

A

Duration:
- 10 - 12 hours Anchorage
- 12-14 hours for traction
- Magnitude force:
Anchorage -250- 300g per side
Traction - 400-500g per side Sk effect

30
Q

What is. OIARR?

A

Orthodontically induced apex root resorption

31
Q

Types of root

A
  • Blunt root, peppette chapped and short root
32
Q

What can cause increase risk of root resorption

A
  • Class II elastic with rectangular wire
  • Fixed appliances
  • type of tooth movement - Intrusion movement
  • Previous trauma
  • Longer tx.
33
Q

Type of root resorption

A
  • Internal RR- inflammatory and replacement
  • external RR- inflammatory, replacement , cervical , surface
  • Combined RR
34
Q

How to monitor RR.

A
  • 6 month DP
  • Shorter Tx
  • Limited aim.
35
Q

How does loss of anchorage look ?

A
  • Increased OJ
  • OJ not reduce and Xtn space closing
  • Lateral Open Bite during retraction.
  • Wedge in Nance
36
Q

Thumb suck - Dental feature

A
  • Reduce overbite
  • AOB
  • Increased OJ
  • Retroclined lower
  • Proclined upper central
  • Unilateral openbite with mandibular crossbite
37
Q

Hypodontia UL2 tx?

A
  • Class II - Closed space
  • Class III- Open space for good interdigitation
    Space closer could be slower
  • Open space - Beidge as deciduous then implant.
  • ## 7mm space and root parallel on root to get implant.

Orthodontics (53 decks)

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