Evolution and emerging trends of 4D printing: a bibliometric analysis

Zhang, Wencai; Zhuang, G.; Li, Duanling

doi:10.1051/mfreview/2022028

Cited by 3 publications

(2 citation statements)

References 95 publications

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“…Parvanda et al (2021) review 3D printing technology in the area of fused deposition modeling [FDM]. Evolution and emerging trends of 4D printing are analyzed with bibliometric approach by Zhang et al (2022). Trends in design for additive manufacturing were also investigated using bibliometric analysis (Obi et al , 2022).…”

Section: Literature Review/backgroundmentioning

confidence: 99%

Polymer 3D printing: global research trends

Breznik,

Paoprasert,

Novak

et al. 2024

RPJ

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Purpose This study aims to identify research trends and technological evolution in the polymer three-dimensional (3D) printing process that can effectively identify the direction of technological advancement and progress of acceptance in both society and key manufacturing industries. Design/methodology/approach The Scopus database was used to collect data on polymer 3D printing papers. This study uses bibliometric approach along with network analytic techniques to identify and discuss the most important countries and their scientific collaboration, compares income groups and analyses keyword trends. Findings It was found that top research production results from heavy investments in research and development. The USA has the highest number of papers among the high-income countries. However, scientific production in the other two income groups is strongly dominated by China and India. Keyword analysis shows that countries with lower incomes in certain areas, such as composite and bioprinting, have fallen behind other groups over time. International collaborations were suggested as mechanisms for those countries to catch up with the current research trends. The evolution of the research field, which started with a focus on 3D printing processes and shifted to printed part designs and their applications, was discussed. The advancement of the research topic suggests that translational research on polymer 3D printing has been led mainly by research production from higher-income countries and countries with large research and development investments. Originality/value Previous studies have conducted performance analysis, science mapping and network analysis in the field of 3D printing, but none have focused on global research trends classified by country income. This study has conducted a bibliometric analysis and compared the outputs according to various income levels according to the World Bank classification.

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Section: Literature Review/backgroundmentioning

confidence: 99%

Polymer 3D printing: global research trends

Breznik,

Paoprasert,

Novak

et al. 2024

RPJ

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“…Furthermore, experimental methods will be used to fit the effect of external excitation on deformation control. For example, by combining traditional mechanical structure design, smart materials, and excitation response experiments, the above research ideas are effectively used to achieve complex and precisely controlled spatial and planar topological transformations of 4D printed SMP prefabricated components (Figure 2I) (Zhongyi et al, 2020;Zhang et al, 2022).…”

Section: Current Challengesmentioning

confidence: 99%

Shape memory polymer-based prefabricated components: Design ideas and prospects

Zhang

2023

Front. Mater.

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Shape memory polymers (SMP) are the smart materials that have received the most attention and are the most commonly employed. SMP can be 4D printed to create prefabricated components with transform shapes, properties, or functions under different external excitations. Although smart equipment assembled from these prefabricated components is extensively used in various fields, a systematic overview summary of their design ideas still needs to be provided. This paper briefly analyzes current trends in the design ideas and application of SMP-based prefabricated components. By summarizing two different design ideas: structural combination and material modification, it demonstrates the application of smart equipment assembled from SMP-based prefabricated components in medical, industrial, and aerospace fields. Furthermore, current challenges with both design ideas are discussed.

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Medicaid coverage for gender‐affirming surgery: A state‐by‐state review

LaGuardia,

Chin,

Fadich

et al. 2024

Health Services Research

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ObjectiveTo systematically review Medicaid policies state‐by‐state for gender‐affirming surgery coverage.Data Sources and Study SettingPrimary data were collected for each US state utilizing the LexisNexis legal database, state legislature publications, and Medicaid manuals.Study DesignA cross‐sectional study evaluating Medicaid coverage for numerous gender‐affirming surgeries.Data Collection/Extraction MethodsWe previously reported on state health policies that protect gender‐affirming care under Medicaid coverage. Building upon our prior work, we systematically assessed the 27 states with protective policies to determine coverage for each type of gender‐affirming surgery. We analyzed Medicaid coverage for gender‐affirming surgeries in four domains: chest, genital, craniofacial and neck reconstruction, and miscellaneous procedures. Medicaid coverage for each type of surgery was categorized as explicitly covered, explicitly noncovered, or not described.Principal FindingsAmong the 27 states with protective Medicaid policies, 17 states (63.0%) provided explicit coverage for at least one gender‐affirming chest procedure and at least one gender‐affirming genital procedure, while only eight states (29.6%) provided explicit coverage for at least one craniofacial and neck procedure (p = 0.04). Coverage for specific surgical procedures within these three anatomical domains varied. The most common explicitly covered procedures were breast reduction/mastectomy and hysterectomy (n = 17, 63.0%). The most common explicitly noncovered surgery was reversal surgery (n = 12, 44.4%). Several states did not describe the specific surgical procedures covered; thus, final coverage rates are indeterminate.ConclusionsIn 2022, 52.9% of states had health policies that protected gender‐affirming care under Medicaid; however, coverage for various gender‐affirming surgical procedures remains both variable and occasionally unspecified. When specified, craniofacial and neck reconstruction is the least covered anatomical area compared with chest and genital reconstruction.

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Evolution and emerging trends of 4D printing: a bibliometric analysis

Cited by 3 publications

References 95 publications

Polymer 3D printing: global research trends

Polymer 3D printing: global research trends

Shape memory polymer-based prefabricated components: Design ideas and prospects

Medicaid coverage for gender‐affirming surgery: A state‐by‐state review

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