Restoration of an endodontically treated tooth Flashcards
How could you restore an endodontically treated anterior tooth with intact marginal ridges?
- composite restoration
OR - veneer
How could you restore an endodontically treated anterior tooth with intact marginal ridges but a discoloured crown
- bleaching
OR - veneer
How would you restore an endodontically treated tooth with destroyed marginal ridges?
- core build up with crown
OR - post crown
What is the function of a post and core
Core = retention for crown
Post = retains core
Where is a post placed?
in the root canal
What is a core?
what the prosthesis is cemented to
What are the features of an ideal post?
parallel sided:
- more retentive than tapered
- avoids wedging
non-threaded (Passive)
- smooth surface incorporates less stress to remaining tooth than treated (active)
cement retained
- less retentive than threaded post
BUT
- cement acts as buffer between masticatory forces and post/tooth
What materials can be used for posts?
- metal: gold, stainless steel, brass, titanium
- ceramics: alumina, zirconia
- fibre: glass, quartz, carbon
What are the downsides of metal posts?
- poor aesthetics
- corrosion
- vulnerable to root fracture
- nickel sensitivity
- radiopaque
What are the advantages of ceramic posts?
- favourable aesthetics
- high flexural strength
- high fracture toughness
what are the disadvantages of ceramic posts?
- difficult retrievability
- root fracture common
What are the advantages of fibre posts?
- flexible
- similar properties to dentine
- good aesthetics
- retrievable
- radiolucent on radiographs
What materials can be used for a core?
- composite
- amalgam
- glass ionomer
What is the most commonly used core material and why?
Composite
- tooth coloured - aesthetics
- bonds to tooth structure
- used with fibre posts
what are the downsides to amalgam cores?
- tends to avoid retention
- poor aesthetics
- needs 24 hours to set
