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Article

Influence of Framework Material and Posterior Implant Angulation in Full-Arch All-on-4 Implant-Supported Prosthesis Stress Concentration

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Department of Dental Materials, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, 1081 LA Amsterdam, The Netherlands
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Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University-UNESP, São José dos Campos 12220-000, Brazil
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Fraunhofer JL IDEAS, Department of Industrial Engineering, University of Naples Federico II, 80125 Naples, Italy
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School of Dentistry, University of Naples Federico II, Via S. Pansini 5, 80131 Naples, Italy
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Author to whom correspondence should be addressed.
Academic Editors: Gabriele Cervino, Till Dammaschke, Hans S. Malmstrom and Jiiang-Huei Jeng
Dent. J. 2022, 10(1), 12; https://doi.org/10.3390/dj10010012
Received: 13 December 2021 / Revised: 27 December 2021 / Accepted: 12 January 2022 / Published: 14 January 2022
This study evaluated the influence of distal implants angulation and framework material in the stress concentration of an All-on-4 full-arch prosthesis. A full-arch implant-supported prosthesis 3D model was created with different distal implant angulations and cantilever arms (30° with 10-mm cantilever; 45° with 10-mm cantilever and 45° with 6-mm cantilever) and framework materials (Cobalt–chrome [CoCr alloy], Yttria-stabilized tetragonal zirconia polycrystal [Y-TZP] and polyetheretherketone [PEEK]). Each solid was imported to computer-aided engineering software, and tetrahedral elements formed the mesh. Material properties were assigned to each solid with isotropic and homogeneous behavior. The contacts were considered bonded. A vertical load of 200 N was applied in the distal region of the cantilever arm, and stress was evaluated in Von Misses (σVM) for prosthesis components and the Maximum (σMAX) and Minimum (σMIN) Principal Stresses for the bone. Distal implants angled in 45° with a 10-mm cantilever arm showed the highest stress concentration for all structures with higher stress magnitudes when the PEEK framework was considered. However, distal implants angled in 45° with a 6-mm cantilever arm showed promising mechanical responses with the lowest stress peaks. For the All-on-4 concept, a 45° distal implants angulation is only beneficial if it is possible to reduce the cantilever’s length; otherwise, the use of 30° should be considered. Comparing with PEEK, the YTZP and CoCr concentrated stress in the framework structure, reducing the stress in the prosthetic screw. View Full-Text
Keywords: dental implants; finite element analysis; polymers; prosthodontics dental implants; finite element analysis; polymers; prosthodontics
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MDPI and ACS Style

Tribst, J.P.M.; Campanelli de Morais, D.; Melo de Matos, J.D.; Lopes, G.d.R.S.; Dal Piva, A.M.d.O.; Souto Borges, A.L.; Bottino, M.A.; Lanzotti, A.; Martorelli, M.; Ausiello, P. Influence of Framework Material and Posterior Implant Angulation in Full-Arch All-on-4 Implant-Supported Prosthesis Stress Concentration. Dent. J. 2022, 10, 12. https://doi.org/10.3390/dj10010012

AMA Style

Tribst JPM, Campanelli de Morais D, Melo de Matos JD, Lopes GdRS, Dal Piva AMdO, Souto Borges AL, Bottino MA, Lanzotti A, Martorelli M, Ausiello P. Influence of Framework Material and Posterior Implant Angulation in Full-Arch All-on-4 Implant-Supported Prosthesis Stress Concentration. Dentistry Journal. 2022; 10(1):12. https://doi.org/10.3390/dj10010012

Chicago/Turabian Style

Tribst, João P.M., Dayana Campanelli de Morais, Jefferson D. Melo de Matos, Guilherme d.R.S. Lopes, Amanda M.d.O. Dal Piva, Alexandre L. Souto Borges, Marco A. Bottino, Antonio Lanzotti, Massimo Martorelli, and Pietro Ausiello. 2022. "Influence of Framework Material and Posterior Implant Angulation in Full-Arch All-on-4 Implant-Supported Prosthesis Stress Concentration" Dentistry Journal 10, no. 1: 12. https://doi.org/10.3390/dj10010012

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