Mechanical Stress Analysis of Different Configurations of the All-on-4 Concept in Atrophic Mandible: A 3D Finite Element Study
| Autor: | Camila Cristina de Foggi, Henrique Takashi Idogava, Luis Carlos Leal Santana, Fernando P. S. Guastaldi, Luis Geraldo Vaz, Pedro Yoshito Noritomi |
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| Přispěvatelé: | Universidade Estadual Paulista (Unesp), Massachusetts General Hospital, Universidade Estadual de Campinas (UNICAMP), Renato Archer Information Technology Center, Universidade Federal de São Carlos (UFSCar) |
| Rok vydání: | 2021 |
| Předmět: |
Dental Implants
Dental Stress Analysis Orthodontics Materials science Finite Element Analysis Dental prosthesis mechanical stress Mandible Abutment finite element analysis General Medicine Stress (mechanics) Short implants Dental Prosthesis Design dental implants Fracture (geology) von Mises yield criterion Dental Prosthesis Implant-Supported Stress Mechanical Implant short implants Oral Surgery |
| Zdroj: | Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| ISSN: | 0882-2786 |
| DOI: | 10.11607/jomi.8150 |
| Popis: | Made available in DSpace on 2021-06-25T10:24:28Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-01-01 Purpose: This study evaluated the mechanical behavior of different configurations of the AII-on-4 treatment concept designed with straight short (6-mm-length), straight standard (11-mm-length), or tilted standard (30-degree angled; 11-mm-length) posterior implants. Materials and Methods: The AII-on-4 configurations were performed in atrophic mandible models and consisted of anterior straight standard and posterior tilted standard implants (H1 model), anterior straight standard and posterior straight short implants (H2 model), and anterior and posterior straight standard implants (H3 model). Three oblique forces of 100 N were simulated in the posterior region of the prosthetic bar. The values of stress were obtained for the ductile materials using the von Mises equivalent stress (σvm) criteria. The stress peaks in the peri-implant bone crest were measured by the maximum (σmax) and minimum (σmin) principal stresses. The two-way analysis of variance (two-way ANOVA) and Tukey post hoc tests determined significant differences (P < .01) of stress values among the ductile materials (implant and prosthetic components). Results: The use of tilted standard posterior implants (H1 model) showed the lowest values of σmax and σmin in the posterior region of the peri-implant bone area. On the other hand, the use of straight short (H2 model) or straight standard (H3 model) posterior implants significantly reduced the von Mises mean stresses in the bar screws, abutments, and abutment screws (P < .01). Conclusion: The higher odds of technical failures (screw fracture/loosening) may be expected when the AII-on-4 configuration is performed with tilted standard posterior implants. Also, peri-implant bone overload may occur when the AII-on-4 design is performed with straight short or straight standard posterior implants in atrophic mandibles. Int J Oral Maxillofac Implants 2021;36:75–85. doi:10.11607/jomi.8150 Department of Diagnosis and Surgery São Paulo State University (Unesp) School of Dentistry Department of Oral and Maxillofacial Surgery Massachusetts General Hospital Department of Integrated Systems Faculty of Mechanical Engineering State University of Campinas (Unicamp) 3D Technology Core Renato Archer Information Technology Center Chemistry Department Federal University of São Carlos (UFSCar) Department of Dental Materials and Prosthodontics São Paulo State University (Unesp) School of Dentistry Department of Diagnosis and Surgery São Paulo State University (Unesp) School of Dentistry Department of Dental Materials and Prosthodontics São Paulo State University (Unesp) School of Dentistry |
| Databáze: | OpenAIRE |
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