The Finite Element Analysis of the Impact of Ferrule Height and Post-Core Materials on Stress Distribution in Incisors
Year: 2025
Type: article
Abstract: OBJECTIVE: Ferrule heights and post-core materials are key factors for post-core restorations, and the interaction between them needs further investigation. This study used finite element analysis to evaluate the stress distribution of post-core models with different materials and varying ferrule heights. METHODS: A 3-dimensional finite element model of the maxillary central incisor was constructed, along with 3 additional groups with different ferrule heights: 2 mm, 1 mm, and 0 mm. Meanwhile, various materials were designed to form the post-core: Zirconia, Titanium, Fiberglass, PEEK, and CFR-PEEK (PEEK reinforced by 30% carbon fiber). A 100 N load was applied at an angle of 45° with the tooth's longitudinal axis on the palatal surface of the crown. The peak von Misses (VM) stress values were recorded. RESULTS: As the ferrule height increased, a stress reduction was observed at post-core and post-cement interfaces, while the stress in root and cement interfaces increased; meanwhile, the peak VM stress of the post-core decreased among all groups, while that of rigid material groups (Zirconia/Titanium) decreased more significantly; in addition, the peak VM stress at post-core and cement interfaces increased, and that of the 0 mm ferrule PEEK group was the highest. CONCLUSION: Ferrule heights and post-core materials affect stress distribution on post-core restorations. A sufficiently large ferrule height can effectively compensate for the stress concentration of highly rigid materials, and PEEK post-core should be carefully used in 0 mm ferrule cases. CLINICAL RELEVANCE: This study would provide suggestions for dentists to choose appropriate post-core materials according to various ferrule heights.
Source: International Dental Journal
Authors: Beibei Yang, Boxuan Wang, Liangzhi Du, Fang Wang
Institution: Xi'an Jiaotong University
Language: English
Subfield: Orthodontics
Field: Dentistry
Domain: Health Sciences
Open Access status: gold
Estimated APC paid: $2,550
Funder: Xi'an Jiaotong University
OpenAlex ID: W4412556083