Tribological and mechanical performance evaluation of metal prosthesis components manufactured via metal injection molding

Melli, Virginia; Juszczyk, Mateusz; Sandrini, Enrico; Bolelli, Giovanni; Bonferroni, Benedetta; Lusvarghi, Luca; Cigada, A.; Manfredini, Tiziano; Nardo, Luigi De

doi:10.1007/s10856-014-5332-z

Cited by 9 publications

(3 citation statements)

References 24 publications

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“…Casting and milling methods, which were the simplest manufacturing processes in the early days, are unsuitable for making homogeneous and fine pores in the internal structure of titanium [ 6 ]. To overcome such process limitations, various methods for manufacturing porous titanium have been studied, including hot isostatic pressing [ 17 ], metal injection molding [ 18 ], spark plasma sintering [ 19 ], space holder technique [ 20 ], plasma spraying [ 21 ], anodic dissolution [ 22 ] and powder metallurgy [ 23 ]. However, some techniques can produce only cavities and not interconnected pores.…”

Section: Discussionmentioning

confidence: 99%

Bone Conduction Capacity of Highly Porous 3D-Printed Titanium Scaffolds Based on Different Pore Designs

Lim

Ryu²,

Woo³

et al. 2021

Materials

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In porous titanium scaffolds manufactured via 3D printing, the differences in bone formation according to pore design and implantation period were studied. Titanium scaffolds with three types of different pore structures (Octadense, Gyroid, and Dode) were fabricated via 3D printing using the selective laser melting method. Mechanical properties of scaffolds were investigated. Prepared specimens were inserted into both femurs of nine rabbits and their clinical characteristics were observed. Three animals were sacrificed at the 2nd, 4th, and 6th weeks, and the differences in bone formation were radiologically and histologically analyzed. The percentage of new bone and surface density in the pore structure were observed to be approximately 25% and 8 mm2/mm3, respectively. There was no difference in the amount of newly formed bone according to the pore design at 2, 4, and 6 weeks. In addition, no differences in the amount of newly formed bone were observed with increasing time within the same pore design for all three designs. During the 6-week observation period, the proportion of new bones in the 3D-printed titanium scaffold was approximately 25%. Differences in bone formation according to the pore design or implantation period were not observed.

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Section: Discussionmentioning

confidence: 99%

Bone Conduction Capacity of Highly Porous 3D-Printed Titanium Scaffolds Based on Different Pore Designs

Lim

Ryu²,

Woo³

et al. 2021

Materials

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show abstract

“…Metal injection molding (MIM), a type of PIM, has made inroads into numerous industries as it is fast, cost effective, versatile, and potentially downsizable, as well as possessing outstanding design, dimensional accuracy, and mechanical properties that yield an exceptional surface finish and minimal by-products or waste [39][40][41][42][43][44][45][46][47][48]. At present, MIM is a popular method of manufacturing precise net-shaped parts for orthopedic and dental implants, surgical tools, and medical equipment [21,[49][50][51][52][53][54][55]. Figure 1 depicts some commonly used MIM-fabricated medical tools and equipment.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Processing of Titanium and Titanium Alloys through Metal Injection Molding for Biomedical Applications: 2013–2022

et al. 2023

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Metal injection molding (MIM) is one of the most widely used manufacturing processes worldwide as it is a cost-effective way of producing a variety of dental and orthopedic implants, surgical instruments, and other important biomedical products. Titanium (Ti) and Ti alloys are popular modern metallic materials that have revamped the biomedical sector as they have superior biocompatibility, excellent corrosion resistance, and high static and fatigue strength. This paper systematically reviews the MIM process parameters that extant studies have used to produce Ti and Ti alloy components between 2013 and 2022 for the medical industry. Moreover, the effect of sintering temperature on the mechanical properties of the MIM-processed sintered components has been reviewed and discussed. It is concluded that by appropriately selecting and implementing the processing parameters at different stages of the MIM process, defect-free Ti and Ti alloy-based biomedical components can be produced. Therefore, this present study could greatly benefit future studies that examine using MIM to develop products for biomedical applications.

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“…Several methodologies exist to produce porous titanium structures, such as hot isostatic pressing (HIP) [8], metal injection molding (MIM) [9], 3D printing and spark plasma sintering (SPS) [10]. Unfortunately, it must be noted that some of the methods are complicated, incapable of producing an arbitrarily shaped prosthesis or costly at present.…”

Section: Introductionmentioning

confidence: 99%

Bone ingrowth of various porous titanium scaffolds produced by a moldless and space holder technique: anin vivostudy in rabbits

et al. 2016

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Porous titanium has long been desired as a bone substitute material because of its ability to reduce the stress shielding in supporting bone. In order to achieve the various pore structures, we have evolved a moldless process combined with a space holder technique to fabricate porous titanium. This study aims to evaluate which pore size is most suitable for bone regeneration using our process. The mixture comprising Ti powder, wax binder and PMMA spacer was prepared manually at 70 °C which depended on the mixing ratio of each group. Group 1 had an average pore size of 60 μm, group 2 had a maximum pore size of 100 μm, group 3 had a maximum pore size of 200 μm and group 4 had a maximum pore size of 600 μm. These specimens were implanted into rabbit calvaria for three and 20 weeks. Thereafter, histomorphometrical evaluation was performed. In the histomorphometrical evaluation after three weeks, the group with a 600 μm pore size showed a tendency to greater bone ingrowth. However, after 20 weeks the group with a pore size of 100 μm showed significantly greater bone ingrowth than the other groups. This study suggested that bone regeneration into porous titanium scaffolds is pore size-dependent, while bone ingrowth was most prominent for the group with 100 μm-sized pores after 20 weeks in vivo.

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Tribological and mechanical performance evaluation of metal prosthesis components manufactured via metal injection molding

Cited by 9 publications

References 24 publications

Bone Conduction Capacity of Highly Porous 3D-Printed Titanium Scaffolds Based on Different Pore Designs

Bone Conduction Capacity of Highly Porous 3D-Printed Titanium Scaffolds Based on Different Pore Designs

Recent Advances in Processing of Titanium and Titanium Alloys through Metal Injection Molding for Biomedical Applications: 2013–2022

Bone ingrowth of various porous titanium scaffolds produced by a moldless and space holder technique: anin vivostudy in rabbits

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