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BDS4 Ortho > Risks of Ortho txt > Flashcards

Risks of Ortho txt Flashcards

1
Q

What are the 3 main benefits of Orthodontic txt?

A
  • Improvement in appearance (dental and facial)
  • Improvement in function (mastication and speech(rarely))
  • Improvement in dental health
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2
Q

What severe malocclusion are associated with improvement of function after ortho txt?

A
  • Large AOB
  • Severe increased OJ
  • Marked reverse OJ
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3
Q

What do the numbers mean in terms of txt in the IOTN dental health component?

A

1&2 - No need or Low need (min benefit)
3 - Borderline need (some benefit)
4&5 - Need/high need (sig benefit)

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4
Q

What does the MOCDO acroynm stand for?

A

Missing teeth
Overjet
Crossbites
Displacements of contact points (ie crowding)
Overbites

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5
Q

What are the risks of impacted teeth?

A
  • Root resorption of adjacent
  • Supernumerary can prevent normal eruption
  • Can be ass with cyst formation
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6
Q

What measurement of an OJ is at increased risk of trauma? What makes this problem worse?

A

> 6mm OJ risk of trauma to upper incisors
- Greater the OJ greater the risk
- Worse with incompetent lips

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7
Q

What are some risks with having an Anterior crossbite?

A
  • Loss of perio support
  • Tooth wear
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8
Q

What risk ass with posterior crossbites?

A
  • A sig displacement may lead to asymmetry and requiring early correction
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9
Q

Crowding can make what more difficult to do?

A
  • more difficult to clean
  • surfaces less accessible
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10
Q

What is a negative impact from deep traumatic overbite?

A
  • Gingival stripping
  • Loss of perio support
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11
Q

If a pt has TMJ dysfunction , what advice would you give them if they wanted ortho txt?

A
  • Ortho in isolation should not be offered to impropve TMD
  • Conservative txt must be offered before any ortho
  • Ortho txt may aggravte TMD e.g. using intermaxillary elastics
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12
Q

What are some risk ass with ortho txt?

A
  • Decalcification (weakens the enamel to caries - etch and bond)
  • Root resorption
  • Relapse
  • Soft tissue trauma

less common
- Recession
- Loss of perio support
- Headgear injuries
- Enamel fracture and tooth wear
- Loss of vitality
- Allergy
- Poor or failed txt

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13
Q

How can you prevent decalcification?

A
  • Good case selection of motivated pt , low caries risk and good OH pre txtx
  • Oral hygiene
  • Diet advice
  • Fluoride
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14
Q

What OHI advice would you give pt?

A
  • Toothbrushing
  • Inter dental brushing
  • Min twices per day throughoughly
  • After meals
  • Disclosing tablet
  • Target gingival margins and around each bracket
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14
Q

What diet advice would you give the pt?

A
  • Encourage low cariogenic diet
  • Reduce sugar intake and frequency
  • Use sugar free gum as this stimulates salivary buffer
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15
Q

What fluoride can help prevent decalcoification?

A
  • Toothpaste with F
  • High risk 2800ppm or 5000ppm twice daily
  • Mouthwash 0.05% fluoride mouthwash (225ppm)
  • Duraphat fluoride varnish 22,600ppm
16
Q

Root resorption is an inevitable consequence of ortho txt. What is the average over 2 yrs fixed appliance. What is the most common teeth affected?

A
  • approx 1mm 2yrs fixed
  • Any teeth but UI>LI>6s
17
Q

What are the risk factors for root resorption?

A

Type of tooth movement
- Prolonged high force
- Intrusioin
- Large movements
- Torque root movements

Root form
- Blunt
- Pipette
- Resorbed already

Previous trauma

Nailing biting?

18
Q

What is meant by the term relapse?

A
  • return of features of the original malocclusion following correction
19
Q

What features are more prone to relapse?

A
  • Lower incisor crowding
  • rotations
  • Instanding 2s
  • Spaces and diastemes
  • Class II div 2
  • AOB
20
Q

How do you manage relapse?

A
  • Good case selection
  • informed consent
  • Life long retention either fixed or removable
21
Q

What is the management of recession after ortho txt?

A
  • Correct txt planning (teeth within bone avoid overexpansion
  • Thing biotype
  • Warn pt
  • Gingival graft
22
Q

What should you do if pt has active perio disease and wants ortho?

A
  • Must be treated, stabilsed and maintained before ortho txt starts
23
Q

What allergys can a person have related to ortho?

A
  • Latex
  • Nickel
  • Adhesive - colophony
24
Q

Why might a txt have a poor or even failed outcome?

A

The clinician
- Poor diagnosis
- Poor txt planning
- Operator techniw error i.e. poor mechanics

The Patient
- Unfavourable growth
- Poor coop with either appliance wear, repeated breakages or poor attendance

25
Q

What factors does txt succes increase with?

A
  • Severity of malocclusion
  • motivation of pt
  • Operator expertise
26
Q
A

BDS4 Ortho (9 decks)

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