| Full text | |
| Author(s): |
Mendes Tribst, Joao Paulo
[1]
;
de Oliveira Dal Piva, Amanda Maria
[1]
;
Oezcan, Mutlu
[2]
;
Souto Borges, Alexandre Luiz
[1]
;
Bottino, Marco Antonio
[1]
Total Authors: 5
|
| Affiliation: | [1] Sao Paulo State Univ, Postgrad Program Restorat Dent Prosthodont, Dept Dent Mat & Prosthodont, Inst Sci & Technol, Unesp, SJC, Sao Paulo - Brazil
[2] Univ Zurich, Clin Fixed & Removable Prosthodont & Dent Mat Sci, Dent Mat Unit, Ctr Dent & Oral Med, Zurich - Switzerland
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | EUROPEAN JOURNAL OF PROSTHODONTICS AND RESTORATIVE DENTISTRY; v. 27, n. 2, p. 76-82, JUN 2019. |
| Web of Science Citations: | 0 |
| Abstract | |
Purpose: This study evaluated the stress distribution in different cement-retained implant-supported prostheses with a hybrid abutment. Materials and Methods: Two factors were evaluated: restorative material for the crown and hybrid abutment - zirconia, lithium disilicate and hybrid ceramic, yielding 9 combinations. For finite element analysis, a monolithic crown cemented on a hybrid abutment was modeled and cemented on a titanium base (Ti base). An oblique load (45 degrees, 300 N) was applied to the fossa bottom and system fixation occurred on the bone's base. Results: Each structure was evaluated separately to find the possible weaknesses in geometry and failure criteria. In this context, results demonstrated a significant decrease of maximum principal and von-Mises stresses concentration when crowns with high elastic modulus are cemented onto a hybrid abutment with lower elastic modulus. Conclusions: Considering this theoretical study fora Morse taper implant, the association of a rigid crown with a more resilient hybrid abutment reduces the tensile stress concentration in the restoration cervical region. (AU) | |
| FAPESP's process: | 17/23059-1 - Behavior of different rehabilitations with ceramic materials under mechanical fatigue |
| Grantee: | Marco Antonio Bottino |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 17/09104-4 - Biomechanical behavior and survival of implant-supported hybrid ceramic crowns manufactured by different techniques |
| Grantee: | João Paulo Mendes Tribst |
| Support Opportunities: | Scholarships in Brazil - Doctorate |