Post and core build-ups in crown and bridge abutments: Bio-mechanical advantages and disadvantages
The Journal of Advanced Prosthodontics
;
: 232-237, 2017.
Artigo
em Inglês
| WPRIM
| ID: wpr-141835
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.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Próteses e Implantes
/
Dente
/
Raiz Dentária
/
Técnica para Retentor Intrarradicular
/
Dente Suporte
/
Dentaduras
/
Coroa do Dente
/
Análise de Elementos Finitos
/
Coroas
/
Odontólogos
Limite:
Humanos
Idioma:
Inglês
Revista:
The Journal of Advanced Prosthodontics
Ano de publicação:
2017
Tipo de documento:
Artigo
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