Post Retained Crowns Flashcards
What is a Post Retained Crown?
This is a type of fixed prostheses used to restore
an endodontically treated tooth.
What are the Indications?
Anterior tooth with insufficient coronal
structure to retain a core.
– Undermined marginal ridges
– Loss of incisal edges
– Coronal fracture
– Mesial & distal restorations
Indications?
Posterior tooth with insufficient coronal
structure to retain a core.
- Little or no remaining coronal structure
- Crown with insufficient thickness of tooth
structure after caries removal - Access cavity
Contraindications
•Poor oral hygiene and poor motivation.
•Individual with poor health that cannot
withstand long clinical procedure.
•Persistent periapical pathology post
endodontic treatment.
•Discoloured anterior tooth with intact coronal
structure except for the access opening
– non-vital tooth bleaching and if necessary, labial composite resin or porcelain veneer is a more conservative restorative option.
Components
Post (Dowel)
Core
Crown
Types of Post
•Metallic
•Non-Metallic
Examples of Metallic Posts?
Stainless Steel
Titanium
Titanium Alloy
Gold-Plated Brass
Examples of Non-Metallic Posts?
Carbon Fibre
Ceramic
Glass-Fibre Reinforced
Composite
Classify Posts
Active Posts
Passive Posts
Active Posts
They derive their primary retention directly from the root dentine by the use of threads.
Passive Posts
Passive posts seat passively in close proximity
to the post hole walls, and rely primarily on
the luting cement for their retention.
Types of Active Posts
Self Threading posts
Pretapped posts
Types of Passive Posts
Custom-made Cast Posts
Preformed Posts
