Design, processing and characterization of titanium with radial graded porosity for bone implants

Torres, Yadir; Trueba, Paloma; Pavón, Juan José; Chicardi, E.; Kamm, Paul H.; García‐Moreno, Francisco; Rodríguez-Ortiz, José Antonio

doi:10.1016/j.matdes.2016.07.135

Cited by 64 publications

(40 citation statements)

References 46 publications

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“…Moreover, the poor interface between the different unit cell configurations is still to be solved. Based on the structural gradient design via changes in material compositions, Torres et al [138] used NaCl as a support structure to mix with the titanium powder. When the NaCl was dissolved in water, the porous titanium structure can be formed.…”

Section: Gradient Structure Designmentioning

confidence: 99%

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Additive Manufacturing of Customized Metallic Orthopedic Implants: Materials, Structures, and Surface Modifications

Bai

Cheng

Chen

et al. 2019

Metals

120

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Metals have been used for orthopedic implants for a long time due to their excellent mechanical properties. With the rapid development of additive manufacturing (AM) technology, studying customized implants with complex microstructures for patients has become a trend of various bone defect repair. A superior customized implant should have good biocompatibility and mechanical properties matching the defect bone. To meet the performance requirements of implants, this paper introduces the biomedical metallic materials currently applied to orthopedic implants from the design to manufacture, elaborates the structure design and surface modification of the orthopedic implant. By selecting the appropriate implant material and processing method, optimizing the implant structure and modifying the surface can ensure the performance requirements of the implant. Finally, this paper discusses the future development trend of the orthopedic implant.

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Section: Gradient Structure Designmentioning

confidence: 99%

“…Vary in materials components [126,138] Varied material components, different areas only show material changes, relatively stable structure, and significant compatibility between different layers.…”

Section: Vary In Cell Sizementioning

confidence: 99%

Additive Manufacturing of Customized Metallic Orthopedic Implants: Materials, Structures, and Surface Modifications

Bai

Cheng

Chen

et al. 2019

Metals

120

View full text Add to dashboard Cite

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“…However, the porous substrates of lower pore sizes (100-200 and 250-355 µm) showed S a values of 5.0 and 3.4 µm, respectively, which were slightly rougher compared to the polished fully dense sample. The irregular morphology and surface roughness of the spacer particles as well as their fracture during the compaction process may have affected the roughness of the surface inside the pores (the spacer shape was replicated in the titanium matrix, leaving an inner roughness, as observed in SEM images; Figure 2) compared to the pores obtained by conventional PM [43,44]. Many studies have evaluated the role of surface roughness as a key factor for the adhesion and proliferation of bacteria and mammalian cells [45][46][47].…”

Section: Titanium Substrate Characterization: Microstructural and Mecmentioning

confidence: 99%

Porous Titanium Surfaces to Control Bacteria Growth: Mechanical Properties and Sulfonated Polyetheretherketone Coatings as Antibiofouling Approaches

Beltrán

Civantos

Domínguez-Trujillo

et al. 2019

Metals

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Here, titanium porous substrates were fabricated by a space holder technique. The relationship between microstructural characteristics (pore equivalent diameter, mean free-path between pores, roughness and contact surface), mechanical properties (Young’s modulus, yield strength and dynamic micro-hardness) and bacterial behavior are discussed. The bacterial strains evaluated are often found on dental implants: Methicillin-resistant Staphylococcus aureus (MRSA) and Pseudomonas aeruginosa. The colony-forming units increased with the size of the spacer for both types of studied strains. An antibiofouling synthetic coating based on a sulfonated polyetheretherketone polymer revealed an effective chemical surface modification for inhibiting MRSA adhesion and growth. These findings collectively suggest that porous titanium implants designed with a pore size of 100–200 µm can be considered most suitable, assuring the best biomechanical and bifunctional anti-bacterial properties.

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“…20 Functionally graded materials can be in the form of bulk composites, coating, or films. 22 Several methods had been introduced to fabricate FGMs depending on the requirement, either for surface coatings or bulk FGM. Surface coatings are a thin FGM usually deposited by several vapor deposition techniques, such as CVD and PVD.…”

Section: Processing Techniques Of Fgmmentioning

confidence: 99%

Functionally Graded Materials: An Overview of Dental Applications

Bakar¹,

Basri²,

Jamaludin³

et al. 2018

World Journal of Dentistry

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Background: Functionally graded material (FGM) is a smart configuration for designing composite materials to improve their long-term endurance. The main characteristic of an FGM is the gradual variation in composition and microstructure across its dimensions, resulting in enhanced properties. This approach has been applied in several fields of thermal barrier coatings, power industry, biomechanical, automotive, aerospace, mechanical, civil, nuclear, aeronautic, and naval engineering.Aim: This article is intended to provide an overview of the FGMs, their application in dentistry, and the employment of the concept on the mechanical performance of dental restorative systems. Results:A thorough review of FGM dental applications has found that several researchers have been able to develop different configurations based on FGM concept to avoid failures, such as infrastructure, abutment failures in implantology, and prosthodontics. These strategies result in a gradual transition between dissimilar materials decreasing residual stresses generated during fabrication and function. Conclusion:Of late, multiple parallel researches based on the FGM concept are being carried out on dental implants coated with hydroxyapatite (HA), zirconia (Zr), and its oxides to improve osseointegration and reduce stress behavior. This review attempts to present a thorough understanding of FGMs, their characterization, manufacturing techniques and technology, and their dental applications.Clinical significance: Throughout the past decade, the use of endosteal dental implants as a treatment modality of choice in oral rehabilitation cases has increased. Unfortunately, no artificial implants have biomechanical properties equivalent to that of the surrounding bone. Based on FGM concept, a graded composition between titanium and HA/Zr on the implant surface has now been achieved that has resulted in improved mechanical behavior and osseointegration.

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Design, processing and characterization of titanium with radial graded porosity for bone implants

Cited by 64 publications

References 46 publications

Additive Manufacturing of Customized Metallic Orthopedic Implants: Materials, Structures, and Surface Modifications

Additive Manufacturing of Customized Metallic Orthopedic Implants: Materials, Structures, and Surface Modifications

Porous Titanium Surfaces to Control Bacteria Growth: Mechanical Properties and Sulfonated Polyetheretherketone Coatings as Antibiofouling Approaches

Functionally Graded Materials: An Overview of Dental Applications

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