Mimicking high strength lightweight novel structures inspired from the trabecular bone microarchitecture

2020 ◽  
Vol 378 (2167) ◽  
pp. 20190448
Author(s):  
Navin Kumar ◽  
Amit Kumar ◽  
Piyush Uniyal ◽  
Boda Ramalingaiah ◽  
Sidharath Sharma ◽  
...  
Keyword(s):  
Trabecular Bone ◽  
Volume Fraction ◽  
Bone Microarchitecture ◽  
High Strength ◽  
High Energy ◽  
Mechanical Parameters ◽  
Porous Structures ◽  
Structural Adaptation ◽  
Trabecular Bone Microarchitecture ◽  
Computed Tomography Scanning

Nature's evolution of a billion years has advanced flawless functionality in limitless optimized structures like bone structural adaptation in various physiological behaviours. In this study, porous structures are designed and fabricated from the nature-inspired trabecular bone microarchitecture. A three-dimensional (3D) model of the porous trabecular architecture from the compressive proximal zone of the femoral head was constructed using the micro-computed tomography scanning tool. The model was modified to get porous structures of different volume fractions varying from 20 to 40% with an increment of 10%. The obtained porous structures were 3D printed and analysed for deformation-resistant behaviour. Quasi-static compressive loading was performed at different strain rates (0.001–1 s −1 ) to get an insight into lightweight, high strength structural behaviour. Mechanical parameters, such as specific modulus, specific strength and specific energy absorption, were analysed for the optimal volume fraction. The original volume fraction (30%) of the trabecular bone shows the highest value of mechanical parameters. This study can help engineers to select and design lightweight porous structures with high energy-absorbing capacity, mimicking the desired architecture and porosity available in nature. This article is part of the theme issue ‘Bioinspired materials and surfaces for green science and technology (part 3)’.

Surface curvatures of trabecular bone microarchitecture

Bone ◽  
2002 ◽  
Vol 30 (1) ◽  
pp. 191-194 ◽  
Author(s):  
H Jinnai ◽  
H Watashiba ◽  
T Kajihara ◽  
Y Nishikawa ◽  
M Takahashi ◽  
...  
Keyword(s):  
Trabecular Bone ◽  
Bone Microarchitecture ◽  
Trabecular Bone Microarchitecture

Dental Cone Beam Computed Tomography for Trabecular Bone Quality Analysis in Maxilla and Mandible

2021 ◽  
pp. 542-564
Author(s):  
T. Christy Bobby ◽  
Shwetha V. ◽  
Vijaya Madhavi
Keyword(s):  
Trabecular Bone ◽  
Bone Strength ◽  
Bone Quality ◽  
Bone Microarchitecture ◽  
Quality Analysis ◽  
Trabecular Bone Microarchitecture ◽  
The Stability ◽  
Maxilla And Mandible ◽  
Trabecular Bone Quality ◽  
Implant Treatment

The stability of a dental implant is one of the most important aspects that decide the success rate of implant treatment. The stability is considerably affected by the strength of trabecular bone present in maxilla and mandible. Thus, finding of trabecular bone strength is a key component for the success of dental implants. The trabecular bone strength is usually assessed by quantity of bone in terms of bone mineral density (BMD). Recently, it has been revealed that along with quantity of bone, strength of the bone also depends on quality features commonly referred as trabecular bone microarchitecture. Since the quality of the trabecular bone is varying across the maxilla and mandible, preoperative assessment of trabecular bone microarchitecture at sub-region of maxilla and mandible are essential for stable implant treatment. Thus, in this chapter, the authors inscribe the quantitative analysis of trabecular bone quality in maxilla and mandible using CBCT images by employing contourlet transform.

scholarly journals Characterising the Microstructure of an Additively Built Al-Cu-Li Alloy

Materials ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5188
Author(s):  
Iris Raffeis ◽  
Frank Adjei-Kyeremeh ◽  
Uwe Vroomen ◽  
Silvia Richter ◽  
Andreas Bührig-Polaczek
Keyword(s):  
Volume Fraction ◽  
Analytical Techniques ◽  
High Strength ◽  
High Energy ◽  
Phase System ◽  
X Ray Diffraction ◽  
Powder Bed ◽  
X Ray ◽  
Conventional View ◽  
Multi Phase

Al-Cu-Li alloys are famous for their high strength, ductility and weight-saving properties, and have for many years been the aerospace alloy of choice. Depending on the alloy composition, this multi-phase system may give rise to several phases, including the major strengthening T1 (Al2CuLi) phase. Microstructure investigations have extensively been reported for conventionally processed alloys with little focus on their Additive Manufacturing (AM) characterised microstructures. In this work, the Laser Powder Bed Fusion (LPBF) built microstructures of an AA2099 Al-Cu-Li alloy are characterised in the as-built (no preheating) and preheat-treated (320 °C, 500 °C) conditions using various analytical techniques, including Synchrotron High-Energy X-ray Diffraction (S-HEXRD). The observed dislocations in the AM as-built condition with no detected T1 precipitates confirm the conventional view of the difficulty of T1 to nucleate on dislocations without appropriate heat treatments. Two main phases, T1 (Al2CuLi) and TB (Al7.5Cu4Li), were detected using S-HEXRD at both preheat-treated temperatures. Higher volume fraction of T1 measured in the 500 °C (75.2 HV0.1) sample resulted in a higher microhardness compared to the 320 °C (58.7 HV0.1) sample. Higher TB volume fraction measured in the 320 °C sample had a minimal strength effect.

scholarly journals Bone Micro-CT Assessments in an Orchidectomised Rat Model Supplemented withEurycoma longifolia

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Rosmaliza Ramli ◽  
Mohd Fadhli Khamis ◽  
Ahmad Nazrun Shuid
Keyword(s):  
Trabecular Bone ◽  
Bone Microarchitecture ◽  
Bone Volume ◽  
High Dose ◽  
Micro Ct ◽  
Sprague Dawley ◽  
Elderly Male ◽  
Trabecular Bone Microarchitecture ◽  
Eurycoma Longifolia ◽  
Induced Changes

Recent studies suggested thatEurycoma longifolia, a herbal plant, may have the potential to treat osteoporosis in elderly male. This study aimed to determine the effects ofEurycoma longifoliasupplementation on the trabecular bone microarchitecture of orchidectomised rats (androgen-deficient osteoporosis model). Forty-eight-aged (10–12 months old)Sprague Dawleyrats were divided into six groups of sham-operated (SHAM), orchidectomised control (ORX), orchidectomised + 7 mg/rat testosterone enanthate (TEN) and orchidectomised +Eurycoma longifolia30 mg/kg (EL30), orchidectomised +Eurycoma longifolia60 mg/kg (EL60), orchidectomised +Eurycoma longifolia90 mg/kg (EL90). Rats were euthanized following six weeks of treatment. The left femora were used to measure the trabecular bone microarchitecture using micro-CT. Orchidectomy significantly decreased connectivity density, trabecular bone volume, and trabecular number compared to the SHAM group. Testosterone replacement reversed all the orchidectomy-induced changes in the micro-CT parameters. EL at 30 and 60 mg/kg rat worsened the trabecular bone connectivity density and trabecular separation parameters of orchidectomised rats. EL at 90 mg/kg rat preserved the bone volume. High dose of EL (90 mg/kg) may have potential in preserving the bone microarchitecture of orchidectomised rats, but lower doses may further worsen the osteoporotic changes.

scholarly journals A Comparison of Micro-CT and Dental CT in Assessing Cortical Bone Morphology and Trabecular Bone Microarchitecture

PLoS ONE ◽  
2014 ◽  
Vol 9 (9) ◽  
pp. e107545 ◽  
Author(s):  
Jui-Ting Hsu ◽  
Ying-Ju Chen ◽  
Jung-Ting Ho ◽  
Heng-Li Huang ◽  
Shun-Ping Wang ◽  
...  
Keyword(s):  
Trabecular Bone ◽  
Cortical Bone ◽  
Bone Microarchitecture ◽  
Micro Ct ◽  
Bone Morphology ◽  
Trabecular Bone Microarchitecture ◽  
Dental Ct
Sign in / Sign up

Export Citation Format

Share Document