What instruments are commonly used in an orthodontics lab?
- No. 64 universal pliers
- No. 65 coil formers
- Wire cutters
What does ARAB stand for?
- Active component = source of force for tooth movement
- Retention = resistance to displacement forces
- Anchorage = resistance to unwanted tooth movement
- Baseplate = connects all components together and provides support and retention
What are examples of retentive appliance components?
- Adam’s clasps
- Southend clasps
- Labial bows
- C-clasps
What checks should be done to the appliance once you receive it from the lab?
- check appliance is for correct patient (DOB, name etc)
- check appliance matches the prescription you provided to the lab
- check for any sharp edges by running your finger over the appliance surfaces
- check integrity of the wire work (is there any signs of damage or weak spots)
What should you check when you place an URA into a patients mouth for the first time?
- check for areas of blanching on soft tissues
- check posterior retention
- check anterior retention
- check that flyovers are not interfering with occlusion
- activate the appliance
- demonstrate correct insertion & removal
- book review appointment for 4/6weeks time
What information do you give to a patient who you have just given an URA?
- Appliance may feel big and bulky in time (will get used to this)
- May cause initial excessive salivation (only for 24 hours)
- May impinge speech (practise reading at home and tongue will adjust)
- May cause initial discomfort or ache (this is normal and shows appliance is working)
What specific instructions do you give to a patient who has just received an URA?
- Must be worn 24/7 (including eating and sleeping)
- Remove after meals and clean with a soft brush
- Remove and store in protective container when playing contact sports
- Avoid hot foods and hard sticky foods that may damage the appliance
- Non-compliance will significantly increase treatment time
A patient present to your practise with a digit sucking habit, what do you suggest to help stop this?
- positive reinforcement
- identify triggers and attempt to reverse habit
- bitter flavoured nail varnish
- elastomers/elastoplasts on fingers
- URA: palatal crib/inve
What URA would you prescribe to correct an anterior crossbite on 12?
A: 12; Z-spring; 0.5mm HSSW
R: 14 + 24; Adams Clasps; 0.7mm HSSW
16 + 26; Adams Clasps; 0.7mm HSSW
A: Moving only 1 tooth so okay
B: Self-cure PMMA
Posterior Bite Plane (PBP)
What URA would you prescribe to reduce a 6mm overjet (22, 21, 11, 12) + reduce overbite?
A: 22, 21, 11, 12; Roberts retractor; 0.5mm HSSW + 0.5mm I.D tubing
13 + 23; Mesial stops; 0.7mm (flattened) HSSW
R: 16 + 26; Adams Clasps; 0.7mm HSSW
A: Moving 4 teeth
B: Self-cure PMMA
FABP; overjet (6mm) + 3mm so 9mm
