Restorative Flashcards
(34 cards)
What do you use to assess crown on articulator?
Articulating paper
Calipers
What are the pre-cementation checks for an indirect restoration?
Check on cast-
rocking, contact points, aesthetics, marginal integrity
Occlusal interference
Remove crown from cast-
Check if natural teeth occlude properly
Check if tooth is underprepared
What are the advantages of composite?
Better aesthetics
Bonds to tooth
Minimal prep required
On demand set
Lower thermal conductivity
Supports remaining tooth structure
What are the disadvantages of composite?
Polymerisation shrinkage
Moisture sensitive
Insufficient curing
Post-op sensitivity
Longer placement time
Less wear resistance
Shorter lifespan
What are the failure rates of composite?
Depends on OH/diet and how well it was placed
5-10 years, 13.7% failure rate at 8 years
What are the advantages of amalgam?
Durable
Shorter placement time
Radiopaque
Good wear resistance
Good bulk strength
Resistance to surface corrosion
What are the disadvantages of amalgam?
Potential mercury toxicity
Poor aesthetics
Does not bond to tooth
High thermal diffusivity
Tooth discolouration
Amalgam tattoos
Give the stages of a veneer prep.
Putty matrix for temporary
0.3mm cervical reduction chamfer margin
0.5mm midfacial
1-1.5mm on incisal edge with bevel
Smooth prep
What are the contraindications for bridges?
Insufficient area for bonding
Insufficient quality of bonding surfaces
High caries rate
Long span bridges
Diastemas
Insufficient occlusal clearance
Translucent incisal edges
What is the survival rate of RBB?
5 year survival 80.8%
10 year survival 80.4%
Most likely to fail in first 2 years
What do you use to cement in a MCC indirect restoration?
GIC (aquacem) or RMGIC (relyX luting cement)
What do you use to cement in a metal post?
GIC- aquacem
What do you use to cement a fibre post?
Dual cure composite
Self-adhesive composite (relyx unicem)
What kind of material is RelyX luting cement?
RMGI- resin cement
What is ledermix and what is it used for?
Corticosteroid
Aids in reduction of pulpal inflammation
What is dycal used for?
Pulp capping and/or lining material
Shown to protect the pulp and promote formation of secondary dentine
What are the requirements for posts?
4-5mm of root filling apically
Ferrule- 1.5mm height
atleast 1:1 post to crown ratio
Post should be no more than 1/3 width of remaining tooth
At least half of post length should be in root
What are the ideal post features?
Parallel sided
Avoids ‘wedging’
More retentive than tapered - non-threaded
What are the risks of post treatment?
Perforation
Core fracture
Post fracture
Root fracture
Endodontic failure
What are the tx options for a post with no RCT?
Leave and monitor- unable to tell when it will flare up, risk of abscess, pain, fracture tooth loss
Remove crown and caries
- could reduce likelihood of pain/infection
- chance crown comes off with post
- risk of no RCT-infection
Remove, RCT and replace- tooth may become unrestorable in process
XLA-if unrestorable or symptomatic
What would you do if you gave a patient an IDB palsy?
Explain to the patient and reassure about what has happened- LA into the parotid gland which facial nerve runs through
Facial nerve controls the muscles of facial expression- temporarily paralysed
Test branches of facial nerve- wrinkle forehead, smile, puff out cheeks, close eyes forcibly
Reassure
Cover with eye patch until blink reflex returns
Review in a few days
What are the different types of tooth wear?
Attrition
Abrasion
Erosion
Abfraction
What are the causes of tooth wear?
Medications- acidic or causing dry mouth
GORD
Eating disorder
Bruxism
Pregnancy
Alcoholism
Poor diet
What are the contraindications for the Dahl technique?
Active perio disease
TMJ problems
Post orthodontics
Bisphosphonates
If dental implants present
If existing conventional bridges
