Numerical Evaluation of a Porous Tibial-Knee Implant using Gyroid Structure

Eltlhawy, Basma; Fouda, Noha; Eldesouky, Ibrahim

doi:10.31661/jbpe.v0i0.2005-1116

Cited by 8 publications

(3 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Jette et al ( 2018) left an open window in the solid shell of their stem to facilitate osseointegration [26,42]. Reduced stress shielding was also shown in knee replacements with uniform porosities in the stem of tibial components in two studies, and the geometrically optimized pegs of a femoral component in another study [43][44][45].…”

Section: Uniform Porositymentioning

confidence: 99%

Additively manufactured controlled porous orthopedic joint replacement designs to reduce bone stress shielding: a systematic review

Safavi

Robinson

et al. 2023

J Orthop Surg Res

View full text Add to dashboard Cite

Background Total joint replacements are an established treatment for patients suffering from reduced mobility and pain due to severe joint damage. Aseptic loosening due to stress shielding is currently one of the main reasons for revision surgery. As this phenomenon is related to a mismatch in mechanical properties between implant and bone, stiffness reduction of implants has been of major interest in new implant designs. Facilitated by modern additive manufacturing technologies, the introduction of porosity into implant materials has been shown to enable significant stiffness reduction; however, whether these devices mitigate stress-shielding associated complications or device failure remains poorly understood. Methods In this systematic review, a broad literature search was conducted in six databases (Scopus, Web of Science, Medline, Embase, Compendex, and Inspec) aiming to identify current design approaches to target stress shielding through controlled porous structures. The search keywords included ‘lattice,’ ‘implant,’ ‘additive manufacturing,’ and ‘stress shielding.’ Results After the screening of 2530 articles, a total of 46 studies were included in this review. Studies focusing on hip, knee, and shoulder replacements were found. Three porous design strategies were identified, specifically uniform, graded, and optimized designs. The latter included personalized design approaches targeting stress shielding based on patient-specific data. All studies reported a reduction of stress shielding achieved by the presented design. Conclusion Not all studies used quantitative measures to describe the improvements, and the main stress shielding measures chosen varied between studies. However, due to the nature of the optimization approaches, optimized designs were found to be the most promising. Besides the stiffness reduction, other factors such as mechanical strength can be considered in the design on a patient-specific level. While it was found that controlled porous designs are overall promising to reduce stress shielding, further research and clinical evidence are needed to determine the most superior design approach for total joint replacement implants.

show abstract

Section: Uniform Porositymentioning

confidence: 99%

Additively manufactured controlled porous orthopedic joint replacement designs to reduce bone stress shielding: a systematic review

Safavi

Robinson

et al. 2023

J Orthop Surg Res

View full text Add to dashboard Cite

show abstract

“…As a result, the coupling of TPMS geometrical qualities like structural, thermal, electrical, and sound-absorbing properties offers considerable potential in the multipurpose design of constructed metamaterials and structural systems, as shown in the previous instances. Many new applications are examples (see Supplemental Figure 26) including feed spacers for improvement in heat and mass transfer, 148 battery electrodes, 149 bioreactors, 150 small tibial knee implants, 151 catalytic converter substrates, 152 and thermal insulators. 153 Yang et al 154 proposed the gyroid surface for sound absorption applications due to its curve shape.…”

Section: Commitment To the Thermal Sectormentioning

confidence: 99%

Designs, advancements, and applications of three-dimensional printed gyroid structures: A review

Chouhan

Murali

2023

Proceedings of the Institution of Mechanical Engineers, Part E:

View full text Add to dashboard Cite

Lattice structures play a key role in influencing the mechanical and thermal properties of many applications. Knowing the importance of lattice structure and its influence on mechanical and thermal properties, this article discussed the triply periodic minimal surface-based gyroid shapes, their design, manufacturability, and difficulties while printing with the additive manufacturing process. This review also emphasizes the impact of changing the structure and additive manufacturing process parameters like porosity, wall thickness, unit cell size, infill, and gradient ratio on the mechanical and thermal properties of the printed parts. This study discussed the advantages and disadvantages of replacing conventional structures with bio-inspired gyroid structures and their effects on mechanical and thermal properties. This review also brought a comparative study between gyroid and other existing lattice structures in terms of mechanical and thermal properties and suggestions are been made to use gyroid shapes compared to existing lattice structures for improved thermal mechanical for different applications like biomedical, structural, and heat transfer fields. In this review article, a multitude of research areas could help the researcher to easily decide the appropriate application-based gyroid structure.

show abstract

“…Furthermore, their constant curvature and self‐supporting nature minimizes the waste material during printing 12 . Due to these potential advantages, preliminary studies involving the effectiveness of employing a porous gyroid structure in orthopedic implants, such as hip, 13 knee, 14 and vertebral 15 implants, are emerging. However, there is a paucity of literature evaluating the gyroid structure in shoulder implants, despite stress shielding around the humeral stem component remaining a concern 16 .…”

Section: Introductionmentioning

confidence: 99%

Porous versus solid shoulder implants in humeri of different bone densities: A finite element analysis

Hitchon,

Soltanmohammadi,

Milner

et al. 2024

Journal Orthopaedic Research

View full text Add to dashboard Cite

Porous metallic prosthesis components can now be manufactured using additive manufacturing techniques, and may prove beneficial for promoting bony ingrowth, for accommodating drug delivery systems, and for reducing stress shielding. Using finite element modeling techniques, 36 scenarios (three porous stems, three bone densities, and four held arm positions) were analysed to assess the viability of porous humeral stems for use in total shoulder arthroplasty, and their resulting mechanobiological impact on the surrounding humerus bone. All three porous stems were predicted to experience stresses below the yield strength of Ti6Al4V (880 MPa) and to be capable of withstanding more than 10 million cycles of each loading scenario before failure. There was an indication that within an 80 mm region of the proximal humerus, there would be a reduction in bone resorption as stem porosity increased. Overall, this study shows promise that these porous structures are mechanically viable for incorporation into permanent shoulder prostheses to combat orthopedic infections.

show abstract

Numerical Evaluation of a Porous Tibial-Knee Implant using Gyroid Structure

Cited by 8 publications

References 19 publications

Additively manufactured controlled porous orthopedic joint replacement designs to reduce bone stress shielding: a systematic review

Additively manufactured controlled porous orthopedic joint replacement designs to reduce bone stress shielding: a systematic review

Designs, advancements, and applications of three-dimensional printed gyroid structures: A review

Porous versus solid shoulder implants in humeri of different bone densities: A finite element analysis

Contact Info

Product

Resources

About