Abstract
This study investigated the influence of silica-nylon reinforcement on the stress distribution and fracture load of a resin-bonded fixed partial dental prosthesis (RBFDP). Three-unit RBFDPs (N = 60) were inserted between the first premolar and the first molar of a maxillary model. The groups were divided according to the nylon reinforcement (n = 20/group): conventional fixed prosthesis (without reinforcement), prosthesis with silica-nylon reinforcement positioned vertically, and prosthesis with silica-nylon reinforcement positioned horizontally. Half of the specimens were tested after 24 hours in a universal testing machine until fracture (1,000 kgf; 1 mm/minute) to determine the single load to fracture. The other half was submitted to mechanical aging during 106 cycles (100 N, 2 Hz), totaling 6 groups (n = 10/group). The results were analyzed by two-way analysis of variance (ANOVA; α = 5%). The stress distribution for non-aged groups was simulated using finite element analysis. The numeric prostheses were modeled similarly to the in vitro assay. ANOVA showed no statistical difference between groups (P <.05) for load to fracture. However, the use of the reinforcement provided stability even after the failure, as the parts did not separate. The computational analysis showed similar biomechanical behavior among the groups. The use of the nylon reinforcement does not influence the fracture load or the stress distribution, but it does enable the prosthesis to remain in position after failure.
Original language | English |
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Pages (from-to) | E45-E54 |
Number of pages | 10 |
Journal | International Journal of Periodontics and Restorative Dentistry |
Volume | 41 |
Issue number | 2 |
DOIs | |
Publication status | Published - Apr 2021 |
Bibliographical note
Funding Information:The authors acknowledge the Research Foundation of the State of São Paulo (FAPESP - Grant 11/07334-6). The authors would like to thank the Biostatistics discipline from Professor Ivan Balducci (São Paulo State University, Institute of Science and Technology, São José dos Campos, SP, Brazil) for allowing the authors to achieve these results and conclusion properly. This paper was presented at the 12th Meeting of the Brazilian Prosthesis and Implant Recycling Group (GBRPI; April 2018, Campos do Jordão, São Paulo, Brazil). The authors declare no conflicts of interest.
Funding Information:
The authors acknowledge the Research Foundation of the State of S?o Paulo (FAPESP - Grant 11/07334-6). The authors would like to thank the Biostatistics discipline from Professor Ivan Balducci (S?o Paulo State University, Institute of Science and Technology, S?o Jos? dos Campos, SP, Brazil) for allowing the authors to achieve these results and conclusion properly. This paper was presented at the 12th Meeting of the Brazilian Prosthesis and Implant Recycling Group (GBRPI; April 2018, Campos do Jord?o, S?o Paulo, Brazil). The authors declare no conflicts of interest.
Publisher Copyright:
© 2021 by Quintessence Publishing Co Inc.
Funding
The authors acknowledge the Research Foundation of the State of São Paulo (FAPESP - Grant 11/07334-6). The authors would like to thank the Biostatistics discipline from Professor Ivan Balducci (São Paulo State University, Institute of Science and Technology, São José dos Campos, SP, Brazil) for allowing the authors to achieve these results and conclusion properly. This paper was presented at the 12th Meeting of the Brazilian Prosthesis and Implant Recycling Group (GBRPI; April 2018, Campos do Jordão, São Paulo, Brazil). The authors declare no conflicts of interest. The authors acknowledge the Research Foundation of the State of S?o Paulo (FAPESP - Grant 11/07334-6). The authors would like to thank the Biostatistics discipline from Professor Ivan Balducci (S?o Paulo State University, Institute of Science and Technology, S?o Jos? dos Campos, SP, Brazil) for allowing the authors to achieve these results and conclusion properly. This paper was presented at the 12th Meeting of the Brazilian Prosthesis and Implant Recycling Group (GBRPI; April 2018, Campos do Jord?o, S?o Paulo, Brazil). The authors declare no conflicts of interest.