Analysis of Tantalum Implants used for Avascular Necrosis of the Femoral Head: A Review of Five Retrieved Specimens

Fernández-Fairén, Mariano; Murcia, Antonio; Iglesias, Roberto; Sevilla, Pablo; Manero, J. M.; Gil, F.J.

doi:10.5301/jabfm.2012.9273

Cited by 15 publications

(13 citation statements)

References 49 publications

(90 reference statements)

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“…Moreover, tantalum forms a self-passivating surface oxide layer that leads to the formation of a bone-like apatite coating in vivo. This surface allowed excellent bone and fibrous in-growth properties that led to a rapid and substantial bone and soft tissue attachment [30,15].…”

Section: Introductionmentioning

confidence: 99%

Development of tantalum scaffold for orthopedic applications produced by space-holder method

et al. 2015

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a b s t r a c tIn the present study, production of tantalum porous scaffolds using the space holder technique was performed. The effect of size and content of sodium chloride particles, used as space holder, as well as compacting pressure on foam structure and mechanical properties have been investigated. The morphological characterization was carried out by means of scanning electron microscopy (SEM), mercury intrusion porosimetry (MIP) and micro-CT technique. The relationship between the elastic modulus and yield strength of the tantalum porous scaffold and the pore structure was evaluated. Space holder technique allows obtaining tantalum open-cell structure (70% of porosity) and modulus of elasticity similar to cancellous bone, with reproducible processability into three-dimensional structures and reasonable manufacturing costs.

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Section: Introductionmentioning

confidence: 99%

Development of tantalum scaffold for orthopedic applications produced by space-holder method

et al. 2015

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“…Recently in 2011, Howard et al [33] reported on their early results following the use of porous tantalum femoral cones in 24 revision TKAs at an average 33 months (minimum 24 months) following implantation. These revision procedures were performed for a variety of reasons, including aseptic loosening (11), staged reimplantation for infection (7), severe osteolysis (3), periprosthetic fracture (2), and severe instability (1). The authors reported improvements in the Knee Society score from 55 to 81 at final follow-up as well as good radiographic fixation of the cone at an average 35 months in 20/20 patients (not all patients had asdequate radiographs).…”

Section: Trabecular Metal (Zimmer Warsaw In)mentioning

confidence: 87%

Modern Porous Coatings in Orthopaedic Applications

Frank

Fabi

Levine

2013

Biological and Medical Physics, Biomedical Engineering

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The development of porous metals and coatings for orthopaedic applications has revolutionized the medical field. The ability to bond metallic implants to bone has spawned the advancements in total joint arthroplasty we have experienced over the last 4 decades. Early success was obtained as factors (pore size, coefficient of friction, modulus of elasticity) necessary for osseointegration were just being discovered. Despite good results, initial implant designs were fabricated utilizing traditional coatings (i.e. sintered beads, fiber metal, plasma spray), which have several inherent limitations, including relatively high moduli of elasticity, low coefficient of frictions and intermediate porosity. In order to improve upon these limitations and capitalize on modern techniques for implant fabrication several new porous metals have been recently introduced in orthopaedics. Tritanium (Stryker, Mahwah, NJ), Regenerex (Biomet, Warsaw, IN), StikTite (Smith and Nephew, Memphis, TN), Gription (Depuy, Warsaw, IN), Biofoam (Wright Medical, Arlington, TX), and Trabecular Metal (Zimmer, Warsaw, IN) are currently available for orthopaedic surgery applications. These materials have moved us into the era metallic foams that possess a characteristic appearance similar to cancellous bone. The open-cell internal structure of these metals afford several interesting biomaterial properties, including; high volumetric porosity (60-80 %), low modulus of elasticity and high surface frictional characteristics. The following chapter reviews the mode of fabrication, properties and applications in orthopaedic surgery for this new class of highly porous metals.

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“…After the failure of tantalum rod implantation, it was converted to THA. Extracting a rod is technically demanding due to strong osseointegration of the porous tantalum rod (10). Challenges inclu0de increased blood loss, longer operative time, bone loss along the trajectory of the rod and the subsequent potential increased risk of femoral fracture (44,45).…”

Section: Discussionmentioning

confidence: 99%

“…The surface of the rod has a high-volume porosity (75-80%) with interconnected pores (mean; 430 µm) similar to bone, allowing for primary stability and rapid bone in-growth (9). Soft tissue has been indicated to grow on the rod for 4 weeks post-implantation in an animal model (10). Additionally, a biomechanical fatigue test demonstrated that the rod can bear 4-fold the bodyweights of humans and has an intensity that is 9.3-fold greater than the pressure it resists post-implantation, permitting physiological load-bearing (11,12).…”

Section: Introductionmentioning

confidence: 99%

Comparison of core decompression and porous tantalum rod implantation with conservative treatment for avascular necrosis of the femoral head: A minimum 18�month follow‑up study

et al. 2020

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Porous tantalum rod implantation is a novel surgical method that is used to treat avascular necrosis (AVN) of the femoral head (hip). In the present study, the results of core decompression and tantalum rod implantation were compared with non-surgical treatment for AVN, and the survivorship of the femoral head was evaluated. In total, 60 patients with AVN femoral head were recruited and analysed. Non-surgical treatment was selected by 30 patients (41 hips), 7 with a Ficat score of I and 23 with a score of II. Non-surgical treatment included celecoxib, salvia miltiorrhiza and tetramethylypyrazine and a reduction in weight-bearing activities. Surgical treatment and porous tantalum rod implantation were selected by 30 patients (41 hips), 10 with a Ficat score of I and 20 with a score of II. After follow-up (average: 33.5 months), patients were evaluated by assessing post-operative complications, radiology, hip survivorship and Harris hip score. In the surgical group, pre-operative symptoms were significantly alleviated. No complications, including infection, delayed healing or fractures were reported. Final follow-up rates of femoral head survivorship were 4.9% in the non-surgical group and 36.7% in the surgical group. The Harris hip score was significantly improved following surgery when compared with non-surgical treatment (P<0.05). The results indicated that core decompression and porous tantalum rod implantation are beneficial short-and mid-term treatment methods for AVN of the femoral head.

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Analysis of Tantalum Implants used for Avascular Necrosis of the Femoral Head: A Review of Five Retrieved Specimens

Abstract: Nevertheless, the results obtained in the quantitative assessment of this process proved to be similar to those results achieved by other authors in previous experimental work studies.

Cited by 15 publications

References 49 publications

Development of tantalum scaffold for orthopedic applications produced by space-holder method

Development of tantalum scaffold for orthopedic applications produced by space-holder method

Modern Porous Coatings in Orthopaedic Applications

Comparison of core decompression and porous tantalum rod implantation with conservative treatment for avascular necrosis of the femoral head: A minimum 18�month follow‑up study

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