Factors affecting the length of fiber post and core structure: a literature review
10.12016/j.issn.2096-1456.2017.05.013
- Author:
LIN Jie
1
;
LIN Zhen-xiang
2
;
ZHENG Zhi-qiang
1
;
CHEN Qun
1
;
LU Zhao-jie
1
Author Information
1. Department of VIP Dental Service, School and Hospital of Stomatology, Fujian Medical University
2. Department of Stomatology, Hospital of Fujian Provincial Authorities
- Publication Type:Review
- Keywords:
Fiber post;
Post length;
Ferrule;
Abutment height;
Retention
- From:
Journal of Prevention and Treatment for Stomatological Diseases
2017;25(5):336-340
- CountryChina
- Language:Chinese
-
Abstract:
An id eal balance between the post length within root and the coronal extension should exist. Some theories advocated the use of the longest post as possible as the apical seal is not disturbed. Others advocated that the post should be longer than the crown or that the post should be a certain fraction of the length of the root. The conventional post length has been equal to 2/3-3/4 of the root length from half a century ago. Most of these theories have emphasized the post length in order to achieve sufficient retention and rigidity for coronal restoration. However, dental materials are evolving.With the use of fiber post and resin cement, stress distribution and post retention are improved over conventional metal post and zinc phosphate or glass-ionomer cement. Therefore, with improved bonding strength of fiber post, the post length within root should be minimized to maintain sufficient coronal rigidity. Factors affecting fracture resistance balance of a post-and-core system include the amount of Ferrule height (FH), Post length in root (PLIR), Post length in bone (PLIB), Abutment height (AH), Core length (CL) and Post length out of bone (PLOB). In view of the factors mentioned above, this paper investigated the mechanical factorsin a post-and-core system with literature review.
- Full text:纤维桩核结构长度影响因素的文献回顾.pdf
