Orthodontic Appliances and Retainers

 

Fixed Active

These are cemented in the mouth. Some examples are:

  • Rapid Palatal Expander (RPE)
  • Quad Helix

Fixed Passive

These are cemented but do not have elements that provide forces to the teeth, some examples are:

  • Space maintainers
  • Lingual wire in memosil key

Removable Active

Removable Orthodontic Appliances are often utilised during the course of limited tooth movement within the primary, mixed or permanent dentitions. They may be employed in either upper or lower arches and typically incorporate finger springs or elastics as active components. This would include expansion plates with screws and springs.

Benefits      

  • Aesthetics
  • Easily repaired           

Considerations

  • Case selection
  • Patient compliance
  • Cost
 

Sequential Aligners Invisalign® Scope of Treatment

Type of Treatment
 Description
Invisalign® Full Flexibility to treat wide range of malocclusions
Invisalign® Lite Treats minor crowding/spacing (including orthodontic relapse)
Offers 14 aligners or less
Invisalign® i7 Offers 7 aligners
Invisalign® Teen Treats teenagers, specifically addresses compliance issues, natural eruption of permanent teeth and controls root movement
Vivera® Retainers
(Align Technology Inc.)
Retainers made at the end of treatment by Align Technology.
Ideal Initial Invisalign® Cases for general dentists or aesthetic dentistry:
  • Diastemas
  • Mild spacing/crowding
  • Unaesthetic crowding
Advantages of Invisalign®
  • Aesthetic – minimal visibility and enhanced social acceptance
  • Comfortable to wear
  • Removable nature of Invisalign® aligners makes it easier to maintain good oral hygiene
  • Reduced chairtime for treatment
  • Eliminates bonding issues to heavily filled teeth
  • Prevents occlusal wear if patient is also a bruxer
  • Increased ability to educate patients with treatment protocols, three-dimensional graphics (ClinCheck®), treatment progression and visualisation of potential outcomes
  • ClinCheck® software enables communication with the patient on informed consent
  • Aligners are worn about 22 hours/day and changed (and advanced) over a 2 weekly basis to allow for gentle tooth movement over time
  • Low/zero biological cost
  • General dentist overseas Invisalign® treatment in conjunction with routine general dental treatment

Removable Passive

Orhtodontic Retainers

  Hawley/Begg Essix® Lingual wire in memosil key Vivera®
Effectiveness - Anterior ✓ ✓  ✓ ✓ ✓  ✓ ✓ ✓  ✓ ✓ ✓ 
Effectiveness - Posterior ✓ ✓  ✓ ✓ ✓  - ✓ ✓ ✓ 
Cost ✓  ✓  ✓  ✓ 
Longevity ✓ ✓  ✓ ✓  ✓ ✓ ✓  ✓ ✓ 
Comfort ✓  ✓ ✓  ✓ ✓  to ✓ ✓ ✓ 
(depends on tongue adapting to its presence)
✓ ✓ 
Removability ✓ ✓ ✓  ✓ ✓ ✓  - ✓ ✓ ✓ 
Hygiene ✓ ✓  ✓ ✓ ✓  ✓  ✓ ✓ ✓ 
Occlusal Settling ✓ ✓  (esp. Begg) Limited ✓ ✓ ✓  Limited
Grinding Protection - ✓ ✓ ✓  - ✓ ✓ ✓ 
Bleach / Medicament Application - ✓ ✓ ✓  - ✓ ✓ ✓ 
Ability to Store Digitally - - - ✓ ✓ ✓ 
Ability to be Repaired ✓ ✓ ✓  - ✓  (Limited) -

*Essix appliance (Dr John Sheridan)

Colour Chart