Headgear Flashcards
1
Q
What is the definition of headgear?
A
A means of applying posterior directed forces to teeth and skeletal structures from an external source.
2
Q
What are the two types of headgear and their actions?
A
- Distalising HG - the direction of elastic has a distal component.
- Reverse HG - applying after directed forces to the teeth and skeletal structures from and external source.
3
Q
Name five components of headgear.
A
- Head cap/neck strap
- Elastics
- Facebow
- Facemask
- Chin cap
- Safety straps/mechanism
4
Q
What are the dental uses of distalising headgear?
A
- To reinforce anchorage.
- To distalise single or blocks of teeth.
- To intrude single or blocks of teeth. (low pull)
- To extrude single or blocks of teeth. (high pull)
5
Q
What are the skeletal uses of protractor headgear?
A
- Maxillary enhancement
- possible to achieve 2mm of advancement if combined with RME in the primary/early mixed dentition. - Mandibular suppression
- effect is less clinically relevant than in the maxilla.
6
Q
What duration of force is required to for anchorage purposes when wearing headgear?
A
10-12 hours
7
Q
What duration of force is required to for traction purposes when wearing headgear?
A
12-14 hours
8
Q
According to the BOS how many separate safety features should a prescribed headgear appliance have? Give examples.
A
2
- ‘Snap away’ release system
- Masel safety strap
- Safety facebow with locking mechanism
- Safety facebow with rounded edges
9
Q
What safety instructions should you give to a patient being provided with extra oral traction?
A
- Demonstrate how to fit and remove the appliance correctly (not in one piece).
- When and how long to wear the HG.
- What to expect / pain management.
- Breakages. Stope wearing immediately and contact the practice, if there is contact with the eye go straight to A+E.
- Explain the safety features and how they work.
- Remove the headgear when playing any sports.
