The biomechanics of implant-supported cantilevered fixed partial dentures: Systematic review of the literature

Amine, Meriem; Benazouz, Ichraq; Andoh, Abderrahman

doi:10.15761/ohc.1000198

Cited by 6 publications

(5 citation statements)

References 27 publications

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“…(23)(24)(25)(26) However, a systematic review on the biomechanics of implant-supported cantilevered xed dental prosthesis suggested the use of cantilever designs especially mesial cantilevers as a prosthetic alternative avoiding more invasive surgical procedures, yet the clinical criteria as cantilever length, occlusion scheme, implant number and diameter should be highly considered. (27) Regarding implant prosthetic materials, The second null hypothesis was rejected as our results showed speci c inter-relationships between the resultant stresses in the different structures and the elastic modulus of the prosthetic material. Rigid zirconia induced the highest von Mises stresses in the prosthesis (105.0 MPa) and the lowest values in implant (48.9 MPa) and bone (19.6 MPa) regardless the prosthetic design, while resilient PEKK generated the lowest stresses in the prosthesis (35.4 MPa) and the highest von Mises stresses in the implant (111.6 MPa) and bone (100.0 MPa).…”

Section: Discussionmentioning

confidence: 86%

Biomechanical behavior of implant retained prostheses in the posterior maxilla using different materials: A finite element study

Aboelfadl,

Keilig,

Ebeid

et al. 2024

Preprint

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Background: In this study, the biomechanical behavior of the mesial and distal off-axial extensions of implant-retained prostheses in the posterior maxilla with different prosthetic materials were investigated using FEA. Methods: 3D finite element models with three implant prosthetic designs: fixed-fixed, mesial cantilever, and distal cantilever were designed depending upon cone beam CT images of an intact maxilla of an anonymous patient. The 3D modeling software Mimics Innovation Suite (Mimics 14.0 / 3-matic 7.01; Materialise, Leuven, Belgium) was used. All the models were imported into the FE package Marc/Mentat (ver. 2015; MSC Software, Los Angeles, Calif). The material properties of the implant, bone, monolithic zirconia, and polyetherketoneketone polymer (PEKK) were taken from literature. Then, individual models were subjected to separate axial loads of 300 N. Stress values were computed for the prosthesis, bone, and implant under axial loading. Results: Distal off-axial extension designs generated the maximum von Mises stresses (105 MPa) while the fixed-fixed designs generated the minimum von Mises stresses (35 MPa). The zirconia distal cantilever model yielded the most elevated levels of von Mises stresses within the prosthesis (105 MPa), with concentrated patterns at the implant prosthesisinterface near the offset extension. The von Mises stresses were highest in the implant (112 MPa) and compact bone (100 MPa) for the PEKK distal cantilever model. On the other hand, the zirconia fixed-fixed model exhibited the minimum von Mises stresses in the implant (49 MPa) and compact bone (20 MPa). Conclusions: The fixed-fixed prosthetic design showed the lowest von Mises stresses. In clinically challenging conditions Mesial cantilever design together with a rigid prosthetic material is suggested as a second alternative with acceptable biomechanical behavior.

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Section: Discussionmentioning

confidence: 86%

Biomechanical behavior of implant retained prostheses in the posterior maxilla using different materials: A finite element study

Aboelfadl,

Keilig,

Ebeid

et al. 2024

Preprint

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“…Thus, to reach a successful design the clinical criteria that affect stress dissipation should be well-known. Such knowledge can decrease mechanical failures and improve the longevity of the fixed free designed prostheses (Amine et al 2020).…”

Section: Discussionmentioning

confidence: 99%

Assessment of different materials used for fabrication of fixed free fixed dental prostheses: finite element analysis

Galal,

ElHotieby,

Hamza

et al. 2024

Bull Natl Res Cent

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Background This research assessed three materials to be used in the fabrication of fixed free fixed dental prosthesis using finite element analysis. Total deformation, Von Mises stress maximum amounts and sites on both the bone, and the fixed dental prosthesis body were compared. Methods 3D finite element model was made for the tested fixed dental prosthesis and a contact scanner was used. A fixed free dental prosthesis was made restoring the maxillary first premolar, where second premolar with first molar were the supporting abutments that were scanned. Porcelain fused to metal, CEREC Tessera (Dentsply Sirona) and Poly-Ether-Ketone-Ketone were assessed as fixed free dental prosthesis materials. Cement thickness was adjusted to 40 microns. 100 N vertical load was applied to the central fossa of the pontic in the model. Results The deformations in this study were within the acceptable range except with the PEKK fixed free prosthesis. Tessera showed better results than the porcelain fused to metal as the more elastic modulus allows for absorption of energy from loading. Conclusions Purely used PEKK is not recommended for fixed free dental prosthesis. Low stiffness fixed dental prosthesis material helps in transferring low amount of load to the underneath tissues.

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“…Such knowledge can decrease mechanical failures and improve the longevity of the xed free designed prostheses. [19] Conclusions Pure PEKK is not recommended as a xed prosthesis material with the free pontic design.…”

Section: However Other Researches Had An Opposing Opinion and Differe...mentioning

confidence: 99%

Assessement of different materials used for fabrication of fixed free fixed dental prostheses. Finite element analysis

Galal,

Elhotieby,

Hamza

et al. 2024

Preprint

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Objectives this research assessed three materials to be used for fabrication of fixed free fixed dental prosthesis using finite element analysis, total deformation, Von Mises stress maximum amounts and sites on the bone, and the fixed dental prosthesis body were compared. Methods 3D finite element model was made for the tested fixed dental prosthesis and a contact scanner was used. A fixed free dental prosthesis restoring the maxillary first premolar where second premolar with first molar were the supporting abutments that were scanned. Porcelain fused to metal, CEREC Tessera (Dentsply Sirona) and Poly-Ether-Ketone-Ketone were assessed as fixed free dental prosthesis materials. Cement thickness was adjusted to 40 microns. 100 N vertical load was applied to the central fossa of the pontic in the model. Results The deformations in this study were within the acceptable range except with the PEKK fixed free prosthesis. Tessera was with better results than the porcelain fused to metal as the more elastic modulus allows for absorption of energy from loading. Conclusion Purely used PEKK is not recommended for fixed free dental prosthesis. Low stiffness fixed dental prosthesis material helps in transferring low amount of load to the underneath tissues.

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The biomechanics of implant-supported cantilevered fixed partial dentures: Systematic review of the literature

Cited by 6 publications

References 27 publications

Biomechanical behavior of implant retained prostheses in the posterior maxilla using different materials: A finite element study

Biomechanical behavior of implant retained prostheses in the posterior maxilla using different materials: A finite element study

Assessment of different materials used for fabrication of fixed free fixed dental prostheses: finite element analysis

Assessement of different materials used for fabrication of fixed free fixed dental prostheses. Finite element analysis

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