Roy Björkstrand

ORCID: 0000-0002-4693-9510
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Research Areas
  • Additive Manufacturing and 3D Printing Technologies
  • Additive Manufacturing Materials and Processes
  • Manufacturing Process and Optimization
  • Dental Implant Techniques and Outcomes
  • Facial Trauma and Fracture Management
  • Anatomy and Medical Technology
  • High Entropy Alloys Studies
  • Bone Tissue Engineering Materials
  • Research in Social Sciences
  • 3D Printing in Biomedical Research
  • Digital Transformation in Industry
  • Big Data and Business Intelligence
  • Materials Engineering and Processing
  • Craniofacial Disorders and Treatments
  • Welding Techniques and Residual Stresses
  • Design Education and Practice
  • Laser Material Processing Techniques
  • Electronic Health Records Systems
  • Biomedical Text Mining and Ontologies
  • Reconstructive Facial Surgery Techniques
  • Advanced X-ray and CT Imaging
  • Surgical Sutures and Adhesives
  • ERP Systems Implementation and Impact
  • RFID technology advancements
  • Sustainable Supply Chain Management

Aalto University
2012-2024

VTT Technical Research Centre of Finland
2021

Massachusetts Institute of Technology
2021

Purpose The purpose of this paper is to develop a workflow for 3D modeling and additive manufacturing (AM) patient‐specific medical implants. comprehensive consists four steps: imaging; modelling; manufacturing; clinical application. Implants are used reconstruct bone damage or defects caused by trauma disease. Traditionally, implants have been manually bent shaped, either preoperatively intraoperatively, with the help anatomic solid models. proposed obviates manual procedure may result in...

10.1108/13552541211218126 article EN Rapid Prototyping Journal 2012-04-14

Additive manufacturing technologies are widely used in industrial settings and now increasingly also several areas of medicine. Various techniques numerous types materials for these applications. There is a clear need to unify harmonize the patterns their use worldwide. We present 5-class system aid planning applications related scientific work as well communication between various actors involved this field. An online, matrix-based platform database were developed documentation solutions....

10.1177/1553350614524838 article EN Surgical Innovation 2014-03-09

The purpose of this study is to demonstrate the ability additive manufacturing, also known as 3D printing, produce effective drug delivery devices and implants that are both identifiable, well traceable. Drug can potentially be used for release in direct vicinity target tissues or selected medication route a patient-specific manner required. identification traceability additively manufactured administered through radiofrequency systems. focus explore how embedded sensors added different...

10.3390/jfb9030041 article EN cc-by Journal of Functional Biomaterials 2018-06-29

Purpose Introducing additive manufacturing (AM) in a multinational corporation with global spare parts operation requires tools for dynamic supplier selection, considering both cost and delivery performance. In the switchover to AM from conventional manufacturing, objective of this study is find situations ways improve service end customers. Design/methodology/approach explorative study, authors develop procedure – collaboration operations managers case company operational decision-making...

10.1108/ijopm-01-2022-0054 article EN cc-by International Journal of Operations & Production Management 2022-09-16

Laser powder bed fusion additive manufacturing is used for demanding applications in industries such as aerospace. However, machine-specific, optimized process conditions and parameters are required to assure consistent part quality. In addition, differences supplied can cause variation the mechanical properties of final parts. this paper, variability 316L stainless steel produced with two different laser machines from batches was studied by producing an identical set tensile impact...

10.1016/j.matdes.2021.109684 article EN cc-by Materials & Design 2021-03-30

Laser powder bed fusion (LPBF) has become an established method for manufacturing end-use metal components. Exploiting the geometric freedom of additive (AM) offers broad possibilities part optimization and enables performance enhancements across industry sectors. However, shape feature size have been found to locally affect residual stresses, melt pool cooling rates, microstructure, thus mechanical properties Even though mesoscale structure can induce microstructural changes, there are no...

10.1016/j.addma.2022.103288 article EN cc-by Additive manufacturing 2022-11-21

A major challenge with extensive craniomaxillofacial bone reconstruction is the limited donor-site availability to reconstruct defects predictably and accurately according anatomical shape of patient. Here, patient-specific composite bioimplants, consisting cross-linked poly(trimethylene carbonate) (PTMC) networks β-tricalcium phosphate (β-TCP), are tested in vivo twelve Göttingen minipigs a large mandibular continuity defect model. The 25 mm supported by titanium plates receive either...

10.1002/mabi.202100398 article EN cc-by-nc-nd Macromolecular Bioscience 2022-01-13

Background: Industrial additive manufacturing (AM) methods are currently used for various medical applications.AM makes possible the designing of custom made and even patient specific instruments.We aimed at planning a prototype novel instrument mandible fracture correction. Materials Methods:The reduction forceps were designed using Parametric Computer Aided Design (CAD) system.The three dimensional (3D) data planned transferred to AM machine stereo lithography format.The final physical...

10.4172/2161-1076.1000s1-002 article EN Surgery Current Research 2012-01-01

Abstract The aim of this study is to deploy machine learning (ML) classification methods detect defective regions in additive manufacturing, colloquially known as 3D printing, particularly for the laser-based powder bed fusion process. A custom-designed test specimen composed 316L was manufactured using EOS M 290 machine. Multinomial logistic regression (MLR), artificial neural network (ANN), and convolutional (CNN) techniques were applied train ML models optical tomography infrared images...

10.1088/1757-899x/1296/1/012013 article EN IOP Conference Series Materials Science and Engineering 2023-12-01

In this study, a set of 316 L stainless steel test specimens was additively manufactured by laser-based Powder Bed Fusion. The process parameters were varied for each specimen in terms laser scan speed and power. objective to use narrow band well inside the window, demonstrating detailed parameter engineering specialized additive manufacturing cases. variation monitored using Optical Tomography capture light emissions from layer surfaces. Process emission values stored statistical form....

10.3390/ma17071461 article EN Materials 2024-03-22

Design for additive manufacturing is adopted to help solve problems inherent attaching active personal sampler systems workers monitoring their breathing zone. A novel and parametric 3D printable clip system was designed with an open source Computer-aided design (CAD) additively manufactured. The concept first tested a simple design, when it found be functional, the ability of innovative extended other applications demonstrated by designing another tooling system. mechanical stress test...

10.3390/app10196671 article EN cc-by Applied Sciences 2020-09-24

The clinical translation of bone tissue engineering for reconstructing large defects has not advanced without hurdles. in vivo bioreactor (IVB) concept may therefore bridge between and reconstructive surgery by employing the patient body prefabricating new prevascularized tissues. Ideally, IVB should minimize need exogenous growth factors/cells. Periosteal tissues are promising approaches to prefabricate tissue-engineered (TEB) flaps. However, significance preserving periosteal vascular...

10.1177/00220345211037247 article EN Journal of Dental Research 2021-09-11

A non-equiatomic AlCoCr0.75Cu0.5FeNi alloy has been identified as a potential high strength alloy, whose microstructure and consequently properties can be widely varied. In this research, the phase structure, hardness, magnetic of fabricated by laser powder bed fusion (LPBF) are investigated. The results demonstrate that power, scanning speed, volumetric energy density (VED) contribute to different aspects in formation thus introducing alterations properties. Despite input parameters...

10.3390/ma15051801 article EN Materials 2022-02-28

Abstract Additive manufacturing (AM), more familiarly known as 3D printing, has also been postulated an advantageous technology from a sustainability perspective. A few of these technologies, such laser powder bed fusion (PBF-LB), have increasingly used in industrial production. Considerable performance and efficiency increases are attainable by leveraging the increased design freedom geometrical complexity enabled layer-by-layer principle AM. Design tools, topology optimization, can...

10.1115/imece2024-144022 article EN 2024-11-17
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