Fabrication of Ti-6Al-4v cellular lattice structure using selective laser melting for orthopedic use: A review

Kumawat, Shriniketan; Deshmukh, Sachin R.; Ghorpade, R.R.

doi:10.1016/j.matpr.2023.08.053

Cited by 2 publications

(1 citation statement)

References 45 publications

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“…The personalized implants enable an accurate match of the patient's anatomy, ensuring optimal fit with bone defects 14–16 . Additionally, 3D printing allows the creation of porous structures that simulate the mechanical properties and trabecular structure of bones 17–19 . Therefore, personalized implants not only enhance surgical precision but also contribute to reduced surgery time and improved postoperative outcomes.…”

Section: Introductionmentioning

confidence: 99%

3D‐Printed Personalized Lattice Implant as an Innovative Strategy to Reconstruct Geographic Defects in Load‐Bearing Bones

Li,

Lu,

Zhang

et al. 2024

Orthopaedic Surgery

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ObjectiveGeographic defect reconstruction in load‐bearing bones presents formidable challenges for orthopaedic surgeon. The use of 3D‐printed personalized implants presents a compelling opportunity to address this issue. This study aims to design, manufacture, and evaluate 3D‐printed personalized implants with irregular lattice porous structures for geographic defect reconstruction in load‐bearing bones, focusing on feasibility, osseointegration, and patient outcomes.MethodsThis retrospective study involved seven patients who received 3D‐printed personalized lattice implants for the reconstruction of geographic defects in load‐bearing bones. Personalized implants were customized for each patient. Randomized dodecahedron unit cells were incorporated within the implants to create the porous structure. The pore size and porosity were analyzed. Patient outcomes were assessed through a combination of clinical and radiological evaluations. Tomosynthesis‐Shimadzu metal artifact reduction technology (T‐SMART) was utilized to evaluate osseointegration. Functional outcomes were assessed according to the Musculoskeletal Tumor Society (MSTS) 93 score.ResultsMultiple pore sizes were observed in porous structures of the implant, with a wide distribution range (approximately 300–900 um). The porosity analysis results showed that the average porosity of irregular porous structures was around 75.03%. The average follow‐up time was 38.4 months, ranging from 25 to 50 months. Postoperative X‐rays showed that the implants matched the geographic bone defect well. Osseointegration assessments according to T‐SMART images indicated a high degree of bone‐to‐implant contact, along with favorable bone density around the implants. Patient outcomes assessments revealed significant improvements in functional outcomes, with the average MSTS score of 27.3 (range, 26–29). There was no implant‐related complication, such as aseptic loosening or structure failure.Conclusion3D‐printed personalized lattice implants offer an innovative and promising strategy for geographic defect reconstruction in load‐bearing bones. This approach has the potential to match the unique contours and geometry of the geographic bone defect and facilitate osteointegration.

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Section: Introductionmentioning

confidence: 99%

3D‐Printed Personalized Lattice Implant as an Innovative Strategy to Reconstruct Geographic Defects in Load‐Bearing Bones

Li,

Lu,

Zhang

et al. 2024

Orthopaedic Surgery

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Effect of Laser Scanning Speed and Fine Shot Peening on Pore Characteristics, Hardness, and Residual Stress of Ti-6Al-4V Fabricated by Laser Powder Bed Fusion

Ratanapongpien,

Khantachawana,

Kondoh

2024

Metals

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There is a concern regarding sub-surface pores within laser powder bed fusion of Ti-6Al-4V, which can initiate cracks and reduce mechanical properties, especially after machining for surface finishing. This study investigated the effect of laser scanning speed and fine shot peening on the pore characteristics, hardness, and residual stress of Ti-6Al-4V fabricated by laser powder bed fusion using scanning electron microscopy, X-ray micro-computed tomography, Vickers hardness, and X-ray diffraction. As the laser scanning speed increased, the number of pores and pore size increased, which reduced the hardness of Ti-6Al-4V. Most pores were less than 20 µm in size and randomly distributed. The fine shot peening generated plastic deformation and compressive residual stress on the surface, leading to higher hardness, with similar surface properties at all scanning speeds. The depth of compressive residual stress by fine shot peening varied corresponding to the scanning speeds. Increasing the scanning speed accelerated the rate of conversion between the compressive and tensile residual stresses, and decreased the depth of the maximum hardness by the fine shot peening from initial tensile residual stress within Ti-6Al-4V fabricated by laser powder bed fusion, thus reducing the enhancement achieved by the fine shot peening.

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Fabrication of Ti-6Al-4v cellular lattice structure using selective laser melting for orthopedic use: A review

Cited by 2 publications

References 45 publications

3D‐Printed Personalized Lattice Implant as an Innovative Strategy to Reconstruct Geographic Defects in Load‐Bearing Bones

3D‐Printed Personalized Lattice Implant as an Innovative Strategy to Reconstruct Geographic Defects in Load‐Bearing Bones

Effect of Laser Scanning Speed and Fine Shot Peening on Pore Characteristics, Hardness, and Residual Stress of Ti-6Al-4V Fabricated by Laser Powder Bed Fusion

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