TY - JOUR
T1 - Influence of polymeric restorative materials on the stress distribution in posterior fixed partial dentures: 3D finite element analysis
AU - Campaner, Larissa Mendes
AU - Silveira, Marcos Paulo Motta
AU - de Andrade, Guilherme Schmitt
AU - Borges, Alexandre Luiz Souto
AU - Bottino, M.A.
AU - Dal Piva, Amanda Maria de Oliveira
AU - Lo Giudice, Roberto
AU - Ausiello, Pietro
AU - Tribst, João Paulo Mendes
N1 - This article belongs to the Special Issue: Polymers for Oral and Dental Health.
Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2021/3/1
Y1 - 2021/3/1
N2 - Background: This study evaluated the effect of interim restorative materials (acrylic resin (AR), resin composite (RC) or polyetheretherketone (PEEK) for dental computer-aided design/computeraided manufacturing (CAD/CAM)) on the stress distribution of a posterior three-unit fixed partial denture.Methods: The abutment teeth (first molar and first premolar) were modeled using the BioCAD protocol containing 1.5 mm of axial reduction and converging axial walls. A static structural analysis was performed in the computer-aided engineering software, and the Maximum Principal Stress criterion was used to analyze the prosthesis and the cement layers of both abutment teeth. The materials were considered isotropic, linearly elastic, homogeneous and with bonded contacts. An axial load (600 N) was applied to the occlusal surface of the second premolar.Results: Regardless of the restorative material, the region of the prosthetic connectors showed the highest tensile stress magnitude. The highest stress peak was observed with the use of RC (129 MPa) compared to PEEK and AR. For the cement layers, RC showed the lowest values in the occlusal region (7 MPa) and the highest values for the cervical margin (14 MPa) compared to PEEK (21 and 12 MPa) and AR (21 and 13 MPa).Conclusions: Different interim restorative materials for posterior fixed partial dentures present different biomechanical behavior. The use of resin composite can attenuate the stress magnitude on the cement layer, and the use of acrylic resin can attenuate the stress magnitude on the connector region.
AB - Background: This study evaluated the effect of interim restorative materials (acrylic resin (AR), resin composite (RC) or polyetheretherketone (PEEK) for dental computer-aided design/computeraided manufacturing (CAD/CAM)) on the stress distribution of a posterior three-unit fixed partial denture.Methods: The abutment teeth (first molar and first premolar) were modeled using the BioCAD protocol containing 1.5 mm of axial reduction and converging axial walls. A static structural analysis was performed in the computer-aided engineering software, and the Maximum Principal Stress criterion was used to analyze the prosthesis and the cement layers of both abutment teeth. The materials were considered isotropic, linearly elastic, homogeneous and with bonded contacts. An axial load (600 N) was applied to the occlusal surface of the second premolar.Results: Regardless of the restorative material, the region of the prosthetic connectors showed the highest tensile stress magnitude. The highest stress peak was observed with the use of RC (129 MPa) compared to PEEK and AR. For the cement layers, RC showed the lowest values in the occlusal region (7 MPa) and the highest values for the cervical margin (14 MPa) compared to PEEK (21 and 12 MPa) and AR (21 and 13 MPa).Conclusions: Different interim restorative materials for posterior fixed partial dentures present different biomechanical behavior. The use of resin composite can attenuate the stress magnitude on the cement layer, and the use of acrylic resin can attenuate the stress magnitude on the connector region.
KW - Biomechanics
KW - Dental materials
KW - Finite element analysis
KW - Prosthodontics
UR - https://www.scopus.com/pages/publications/85102266041
UR - https://www.scopus.com/inward/citedby.url?scp=85102266041&partnerID=8YFLogxK
U2 - 10.3390/polym13050758
DO - 10.3390/polym13050758
M3 - Article
AN - SCOPUS:85102266041
SN - 2073-4360
VL - 13
SP - 1
EP - 11
JO - Polymers
JF - Polymers
IS - 5
M1 - 758
ER -