Post and core build-ups in crown and bridge abutments: Bio-mechanical advantages and disadvantages
The Journal of Advanced Prosthodontics
;
: 232-237, 2017.
Article
in English
| WPRIM
| ID: wpr-141834
ABSTRACT
Dentists often place post and core buildups on endodontically treated abutments for crown and bridge restorations. This article analyzes the bio-mechanical purposes, advantages and disadvantages of placing a core or a post and core in an endodontically treated tooth and reviews literature on post and core biomechanics. The author assesses the scientific rationale of the claim that the main purpose of a post is to retain a core, or the claim that posts weaken teeth. More likely, the main function of a post is to help prevent the abutment, on which a crown is cemented, from fracturing such that the abutment separates from the tooth root, at a fracture plane that is located approximately and theoretically at the level of the crown (or ferrule) margin. A post essentially improves the ferrule effect that is provided by the partial fixed denture prosthesis. This paper also explores the difference between bio-mechanical failures of crowns caused by lack of retention or excess taper, versus failures due to a sub-optimal ferrule effect in crown and bridge prostheses.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Prostheses and Implants
/
Tooth
/
Tooth Root
/
Post and Core Technique
/
Dental Abutments
/
Dentures
/
Tooth Crown
/
Finite Element Analysis
/
Crowns
/
Dentists
Limits:
Humans
Language:
English
Journal:
The Journal of Advanced Prosthodontics
Year:
2017
Type:
Article
Similar
MEDLINE
...
LILACS
LIS