Crown Fitting and Cementation - Clinical Procedure

Question 1

describe the steps of receiving work from the lab and placing it.

Answer 1

1. check the models
   - any damage? does it look right? is it what asked for
2. check the patient
   - does the tooth have any other symptoms? temp intact and comfortable? sensitivity - is LA required?
3. Fit the restoration
4. Check the crown fits
5. Cementation

Question 2

how do you remove a temporary crown?

Answer 2

carefully with excavator under the margin and lift

Question 3

what steps must be taken after removing a temporary crown? (4)

Answer 3

• check the occlusion
• ensure all temporary cement is removed
• clean the preparation
• protect the airway with gauze

Question 4

what equipment is needed chairside when fitting the restoration?

Answer 4

• floss
• fit checker spray
• gold thickness gauge
• occlusal indicator paper
• straight hand piece

Question 5

how do you check a crown fits?

Answer 5

• check margins with a probe
• contact points with floss
• check occlusion with indicator paper

Question 6

what must be ensured before the crown is cemented?

Answer 6

• it fits
• preparation is isolated and dried
• restoration is cleaned and dry

Question 7

describe how to cement a crown

Answer 7

• mix the cement
• place layer in the restoration
• seat firmly, applying pressure
• ask patient to occlude - ensures its fully seated
• patient to occlude on a cotton wool roll so cement can set
• remove excess cement
• floss through contacts

Question 8

when should you review a patient after cementing the crown?

Answer 8

2 weeks time