47. Post & Core
Aug 18, 2020 ·
9m 42s
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Description
POST & CORE When there isn’t enough crown structure Can put on same day as OBT Depends on the remaining coronal structure of the nature tooth –...
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POST & CORE
When there isn’t enough crown structure
Can put on same day as OBT
Depends on the remaining coronal structure of the nature tooth – indication
Function – retention of core
PIEZO REAMER is used to make post space inside the canal
Continuous wave / sectional GP / system B technique
Resin – modified GIC is ideal to cement post
Factors that affect its efficiency:-
a. Length :-
2/3rd of the canal – most imp
4-5mm length from apex
4mm- minimum GP to be left
5mm- ideal GP to be left in the canal
b. Diameter :-
Greater the diameter, more the efficiency
c. Surface Texture :-
Rough surface is preferable than smooth ones. Roughened / serrated
d. Post material :-
Pre-fabricated posts such as fibre posts & metallic posts
Custom made posts such as casted posts
e. Post shape :-
Parallel is preferred than tapered ones
More retention
CASTED POSTS
Indicated in anteriors & flared canals
FIBRE POSTS
Can absorb shock
Best in posteriors
Can withstand masticatory forces
METAL POSTS
Least preferred
May fracture the tooth
CORE BUILD-UP
Core should take the shape of natural tooth
Should extend to contra-bevel to produce ferrule effect
NB: Management of re-infected post & core treated tooth:
- Apicocectomy
- If not possible go for extraction
- Can’t do re-RCT here usually
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When there isn’t enough crown structure
Can put on same day as OBT
Depends on the remaining coronal structure of the nature tooth – indication
Function – retention of core
PIEZO REAMER is used to make post space inside the canal
Continuous wave / sectional GP / system B technique
Resin – modified GIC is ideal to cement post
Factors that affect its efficiency:-
a. Length :-
2/3rd of the canal – most imp
4-5mm length from apex
4mm- minimum GP to be left
5mm- ideal GP to be left in the canal
b. Diameter :-
Greater the diameter, more the efficiency
c. Surface Texture :-
Rough surface is preferable than smooth ones. Roughened / serrated
d. Post material :-
Pre-fabricated posts such as fibre posts & metallic posts
Custom made posts such as casted posts
e. Post shape :-
Parallel is preferred than tapered ones
More retention
CASTED POSTS
Indicated in anteriors & flared canals
FIBRE POSTS
Can absorb shock
Best in posteriors
Can withstand masticatory forces
METAL POSTS
Least preferred
May fracture the tooth
CORE BUILD-UP
Core should take the shape of natural tooth
Should extend to contra-bevel to produce ferrule effect
NB: Management of re-infected post & core treated tooth:
- Apicocectomy
- If not possible go for extraction
- Can’t do re-RCT here usually
Information
Author | DrMayakha Mariam |
Organization | DrMayakha Mariam |
Website | - |
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