Fabrication of porous titanium scaffold with controlled porous structure and net-shape using magnesium as spacer

Kim, Sung Won; Jung, Hyun‐Do; Kang, Min Ho; Kim, Hyoun Ee; Koh, Young Hag; Estrin, Yuri

doi:10.1016/j.msec.2013.03.011

Cited by 75 publications

(56 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The range of materials used as a space holder include saccharose crystals [63], NaF [64], NaCl [65,66] and polymer granules [67]. Magnesium has also been used as a space holder to produce porous dental and orthopedic implants [68]. Jurczyk et al recommended ammonium hydrogen carbonate to produce a porous nanocomposite scaffold using titanium containing 10 wt.…”

Section: Fabrication Methods and Mechanical Evaluation Of Porous Titamentioning

confidence: 99%

“…The concept of creation of functionally graded structures in porous materials by changing the structure of the lattice has also been investigated [80]. [19,62] -sintering hollow spheres -thermal decomposition -sintering of powders, compressing and sintering of titanium beads or fibers Removable space holder and titanium metal powder particles: [63][64][65][66][67][68][69] -saccharose crystals -NaF -NaCl -polymer granules -Magnesium -ammonium hydrogen carbonate Additive manufacturing technology: [60,66,74] -selective laser sintering -selective laser melting -electron beam melting Bandyopadhyay and colleagues suggested laser engineered net shaping (LENS™) to construct porous structures from Ti-6Al-4V alloy across the range 23%-32% porosity with low modulus (7-60 GPa) which can be tailored to match human cortical bone [81]. Nomura et al in 2010 recommended the infiltration technique in a vacuum with sintering to create porous titanium/hydroxyapatite composites.…”

Section: Fabrication Methods and Mechanical Evaluation Of Porous Titamentioning

confidence: 99%

See 1 more Smart Citation

Porous Titanium for Dental Implant Applications

Wally

Grunsven

Claeyssens

et al. 2015

Metals

View full text Add to dashboard Cite

Abstract:Recently, an increasing amount of research has focused on the biological and mechanical behavior of highly porous structures of metallic biomaterials, as implant materials for dental implants. Particularly, pure titanium and its alloys are typically used due to their outstanding mechanical and biological properties. However, these materials have high stiffness (Young's modulus) in comparison to that of the host bone, which necessitates careful implant design to ensure appropriate distribution of stresses to the adjoining bone, to avoid stress-shielding or overloading, both of which lead to bone resorption. Additionally, many coating and roughening techniques are used to improve cell and bone-bonding to the implant surface. To date, several studies have revealed that porous geometry may be a promising alternative to bulk structures for dental implant applications. This review aims to summarize the evidence in the literature for the importance of porosity in the integration of dental implants with bone tissue and the different fabrication methods currently being investigated. In particular, additive manufacturing shows promise as a technique to control pore size and shape for optimum biological properties. OPEN ACCESSMetals 2015, 5 1903

show abstract

Section: Fabrication Methods and Mechanical Evaluation Of Porous Titamentioning

confidence: 99%

Section: Fabrication Methods and Mechanical Evaluation Of Porous Titamentioning

confidence: 99%

Porous Titanium for Dental Implant Applications

Wally

Grunsven

Claeyssens

et al. 2015

Metals

View full text Add to dashboard Cite

show abstract

“…compaction by the application of mechanical force or hydrostatic pressure also represents an important and widely used processing method for many granular materials across various industrial sectors, including metals [Liddiard 1984, German 2005, Kim et al 2013 and ceramics [Rahman 2003, Pizette et al 2013. It would be interesting, therefore, to explore whether the SAXS method could also prove useful in studying the compaction behaviour of other materials.…”

mentioning

confidence: 99%

Using small-angle X-ray scattering to investigate the compaction behaviour of a granulated clay

Laity

Asare-Addo

Sweeney

et al. 2015

Applied Clay Science

View full text Add to dashboard Cite

ABSTRACT:The compaction behaviour of a commercial granulated clay (magnesium aluminium smectite, gMgSm) was investigated using macroscopic pressure-density measurements, X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray microtomography (XµT) and small-angle X-ray scattering (SAXS). This material was studied as a potential compaction excipient for pharmaceutical tabletting, but also as a model system demonstrating the capabilities of SAXS for investigating compaction in other situations.Bulk compaction measurements showed that the gMgSm was more difficult to compact than polymeric pharmaceutical excipients such as spheronised microcrystalline cellulose (sMCC), corresponding to harder granules. Moreover, in spite of using lubrication (magnesium stearate) on the tooling surfaces, rather high ejection forces were observed, which may cause problems during commercial tabletting, requiring further amelioration. Although the compacted gMgSm specimens were more porous, however, they still exhibited acceptable cohesive strengths, comparable to sMCC. Hence, there may be scope for using granular clay as one component of a tabletting formulation.Following principles established in previous work, SAXS revealed information concerning the intragranular structure of the gMgSm and its response to compaction. The results showed that little compression of the intragranular morphology occurred below a relative density of 0·6, suggesting that granule rearrangements or fragmentation were the dominant mechanisms during this stage. By contrast, granule deformation became considerably more important at higher relative density, which also coincided with a significant increase in the cohesive strength of compacted specimens.Spatially-resolved SAXS data was also used to investigate local variations in compaction behaviour within specimens of different shape. The results revealed the expected patterns of density variations within flat-faced cylindrical specimens. Significant variations in density, the magnitude of compressive strain and principal strain direction were also revealed in the vicinity of a debossed feature (a diametral notch) and within biconvex specimens. The variations in compaction around the debossed notch, with a small region of high Clay compaction SAXS -revised PRL 2015-01-03

show abstract

“…In order for titanium scaffolds fabricated with SLS technologies to fulil their role well in a patient's organism, they should be characterised by the appropriate size of pores, appropriate porosity, as well as strength permiting usage in bone implants functioning as scafolds, which become a substructure and a support for the bone growing into them. Literature data shows [1][2][3][4][5][6][7][8][9][10][11][12] that the size of pores allowing the development of the bone growth process into the created scafold, varies between the minimum of 50-200 µm and the maximum of 500 µm and the porosity of such a scafold should not exceed 50%. A satisfactory result of a manufacturing process of porous titanium materials is seen when an element is achieved with open pores, characterised by an appropriate level of porosity and suiciently good strength properties, which should be similar to the corresponding properties of a living bone tissue.…”

Section: Introductionmentioning

confidence: 99%

Porous Selective Laser Melted Ti and Ti6Al4V Materials for Medical Applications

Dobrzański¹,

Dobrzańska-Danikiewicz²,

AnnaAchtelik-Franczak³

et al. 2017

Powder Metallurgy - Fundamentals and Case Studies

View full text Add to dashboard Cite

This chapter characterises scafolds manufactured in line with the make-to-order concept according to individual needs of each patient. The clinical data acquired from a patient during computer tomography, nuclear magnetic resonance or using traditional plaster casts is converted by a computer into a virtual solid model of a patient's loss. The model, through the multiplication of a unit cell, is converted into a porous model on the basis of which an actual object is manufactured with the method of selective laser melting (SLM) from Ti/Ti6Al4V powders. The created scafold is characterised by good mechanical properties, which is conirmed by the results of the performed tensile and compressive strength tests. The material is additionally subjected to surface treatment consisting of the deposition of atomic layers of titanium dioxide with nanometric thickness.

show abstract

Fabrication of porous titanium scaffold with controlled porous structure and net-shape using magnesium as spacer

Cited by 75 publications

References 15 publications

Porous Titanium for Dental Implant Applications

Porous Titanium for Dental Implant Applications

Using small-angle X-ray scattering to investigate the compaction behaviour of a granulated clay

Porous Selective Laser Melted Ti and Ti6Al4V Materials for Medical Applications

Contact Info

Product

Resources

About