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http://dx.doi.org/10.4047/jap.2017.9.3.232

Post and core build-ups in crown and bridge abutments: Bio-mechanical advantages and disadvantages  

Mamoun, John (Sunbeam Dental - General Dentistry)
Publication Information
The Journal of Advanced Prosthodontics / v.9, no.3, 2017 , pp. 232-237 More about this Journal
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.
Keywords
Post and core technique; Finite element analysis; Tooth crown; Dental abutments; Denture; Partial; Fixed;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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