Interim Restorations Flashcards
(33 cards)
Aim endo?
Eliminate bacteria from the tooth - needs to be maintained to prevent further ingress
What is an interim restoration?
Restoration placed after pathology removed at commencement of endoodntic treatment
When interim restoration used?
Remain in place while endo being carried out and until definitive restoration placed
What is a temporary restoration?
Placed in cavity -likely to have been cut via interim restoration
8 steps successful Edno?
Dx and remove cause disease Aseptic technique Correct instrumentation cnaals Irrigate canals w/ antibacterial Medicate canals Restore tooth prevent ingress bacteria Fill system once disinfected Restore to normal function
Most common pathway for bacterial ingress?
Caries, cracks, exposed dentine, degraded restoration margins
What type of restoration should never be accessed via for endo?
Failing/ poor quality/ temporary restoration
Why not access via temporary restoration?
Bits fall off = lose reference point
What should good interim restoration provide?
Structural integrity Coronal seal Allow ideal access cavity cut No risk leakage Allows rubber dam to be placed Allows temporary restoration to be placed
What are appropriate materials for interim restoration?
Composite
RMGIC
Amalgam
When should metal bands be used?
Large restorations
Teeth w/ cracks
Adv of metal bands
Supports weakened structure
Prevent progression of cracks
How use metal bands?
Ensure correct size
Lute band - RMGIC/GIC
Good margin allow OHI
Why should crowns be removed prior endo?
Assess underlying structure
Identify pathology
Better orientation
Better coronal seal w/o
How remove crown?
Take putty index - can make temporary
Make groove and twist w/ instrument
If unsuccessful continue groove occlusal, then lingual
What to provide after endo when removed crown?
Provide provisional temporary
Consider using zinc phosphate > temp bond
Consider seal tubules w/ dentine bonding agent
Requirements of temporary restoration?
Occupy access cavity - provide effective and durable coronal seal
Desirable property of temporary restoration?
Ease removal
Difference tooth tissue and restoration
Inexpensive
Examples of temporary materials can be used in access cavity?
Zinc-oxide based - IRM GIC RMGIC Composite Zinc oxide/ calcium sulphate - Cavit
What depth should temp restoration be?
3mm - provide adequate seal
Why should cotton wool not be used?
Wick saliva and bacteria through and under restoration
Use foam pellets
Issue cavit/ coltisol?
Soft material used for double seal
Provide excellent seal but harder remove
How restore tooth following completion endo?
Cut GP to ADJ
Place GIC access - leave 3mm coronally
Restore coronal w/ amalgam/composite
Why do posterior teeth require protection when undertaking endo?
Reduced tooth structure/ loss marginal ridge = access cavity
Axial force - flex cusps / fracture cusps
