Temporary restoration Flashcards
Why?
Stabilise tooth if gross extensive caries
During endo, sedating tooth, inlays and crown fitting process
If no time to restore
If treatment has to suddenly stop
Help control pain
Fractured tooth or restoration
Materials
ZOE, GIC, polycarboxylate cements etc.
Do not leave any infected dentine at CEJ
ZnOE brands
IRM
Kalzinol
ZnOE advantages
Colour different to tooth tissue
Cheap and easy to place
Antibacterial action
Pain relieving
ZnOE disadvantages
Low surface hardness Tooth surface must be dry for placement Limited biocompatibility Non-adhesive Variable marginal sealing Poor compressive strength May inhibit composite resin polymerisation
ZnSO4 advantages
Colour different to tooth tissue
Antibacterial action
Cheap and easy to place
ZnSO4 disadvantages
Limited biocompatibility Poor compressive strength Low surface hardness Concerns about over-expansion when setting causing tooth fracture Variable marginal sealing Non-adhesive
Polycarboxylate cements advantages
Colour different to tooth tissue
Cheap and easy to place
Adhesive
Improved surface hardness compared to ZOE and ZnSO4
Marginal sealing similar to ZOE and ZnSO4
Polycarboxylate cements disadvantages
Limited biocompatibility
Tooth surface cannot be moist/ contaminated with blood/ saliva
Composite and compomers uses
Indirect or direct pulp capping Repair class IV restorations
GIC advantages
Last longer Release of fluoride Biocompatible Very good marginal seal Adhesive
GIC disadvantages
Blends reasonably well with tooth colour
Low order bond strength
Initially weak compressive strength, improves with time
Water soluble - low setting time
Limited biocompatibility near pulp tissue
