Establishment of optimal variable elastic modulus distribution in the design of full-crown restorations by finite element analysis
| Autor: | Li Dao, Yutao Jian, Shumin Chen, Ke Zhao, Xiaodong Wang, Jiang-hai Chen |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Dental Stress Analysis
Materials science Crowns Enamel paint medicine.medical_treatment Finite Element Analysis Dental Porcelain Crown (dentistry) Finite element method Shear (sheet metal) Full Crown Elastic Modulus visual_art Materials Testing Ceramics and Composites visual_art.visual_art_medium medicine Shear stress Humans Bicuspid Adhesive Composite material General Dentistry Elastic modulus |
| Zdroj: | Dental Materials Journal. 40:1403-1409 |
| ISSN: | 1881-1361 0287-4547 |
| DOI: | 10.4012/dmj.2021-053 |
| Popis: | To establish optimal elastic modulus distribution throughout the entire all-ceramic crown, aiming at improvement of the mechanical properties of the restoration as well as the adhesive interface, seven 3D models of mandibular first premolars of zirconia monolithic and bilayer crowns and lithium disilicate monolithic and bilayer crowns were constructed. The elastic modulus distribution of 8-layer crown A referred to human enamel, B was calculated by a genetic algorithm (GA) to minimize the principle stresses on the crown, and C minimized the shear stresses at the cementing lines. After applying a static load of 600 N, the maximum principle stresses were calculated and analyzed by finite element analysis (FEA). Group C were found to have the lowest peak shear stress at the cementing line and moderate peak tensile stress in the crown. Introduction of the modified elastic modulus distribution from human enamel into the entire all-ceramic crown reinforces the mechanical properties of the whole restoration as well as the adhesive interface against chipping and debonding. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|