Additive Manufacturing Systems for Medical Applications: Case Studies

Almeida, Henrique A.; Costa, Ana Filipa; Ramos, Carina; Torres, Carlos; Minondo, Mauricio; Bartolo, Paulo Jorge Da Silva; Nunes, Amanda Ferreira; Kemmoku, Daniel Takanori; Silva, Jorge Vicente Lopes da

doi:10.1007/978-3-319-76084-1_13

Cited by 10 publications

(5 citation statements)

References 10 publications

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“…However, with a fine resolution of 25-35 µm, EnvisionTEC system based on vat photopolymerization has been developed which can produce parts with negligible staircasing effect. This printer has been efficiently utilised in the dental industry owing to the improved capability of producing wide range of hard and soft scaffolds [47]. Despite these efforts, post processing techniques are vital for enhancing the surface finish of finished component and various operations such as abrasive flow machining, chemical machining, machining operations (like turning, milling, CNC machining), and laser surface finishes have been developed.…”

Section: Post Processingmentioning

confidence: 99%

Additive Manufacturing: Post Processing Methods and Challenges

Mishra

Sood

Pandit

et al. 2021

AEF

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Additive Manufacturing (AM) has shown great potential for efficient realization of complicated microdevices fabricated with higher freedom of design and made from a wide variety of materials suiting to their specific target functionalities. Capability of generation of components with reduced weights, higher part consolidation, greater customization offered along with minimal waste generation are its advantages over conventional manufacturing processes. The AM built parts, however, need to undergo relevant post processing techniques to render them fit for their end product application. The paper attempts to classify the post processing techniques and emphasize their applicability to specific AM methods, generalized procedure as well as the recent improvements undergone. The post processing techniques have been categorised as methods for support material removal, surface texture improvements, thermal and non-thermal post processing and aesthetic improvements. The main challenges to the expansion of additive manufacturing have been discussed which highlight the future, scope of improvement and research required in the area of appropriate tool path development and product quality with regards to surface roughness, resolution and porosity levels in the built part.

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Section: Post Processingmentioning

confidence: 99%

Additive Manufacturing: Post Processing Methods and Challenges

Mishra

Sood

Pandit

et al. 2021

AEF

View full text Add to dashboard Cite

show abstract

“…Some of the advantages are the ease of reproducibility and the capacity to produce complex models using biocompatible items producing devices that can be utilized internally and externally [134]. In the past, 3Dscanning and 3D-imaging were used for diagnosing, but now several models are printed with the help of computer assisted design (CAD) programs to obtain a printable model with the desired dimensions and can be modified to suit the patient [135]. Because the technique received much attention and abundant data, it made possible the production of customizable prosthetics used in surgery [136].…”

Section: Tracheal Stentsmentioning

confidence: 99%

Preventing Biofilm Formation and Development on Ear, Nose and Throat Medical Devices

et al. 2021

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Otorhinolaryngology is a vast domain that requires the aid of many resources for optimal performance. The medical devices utilized in this branch share common problems, such as the formation of biofilms. These structured communities of microbes encased in a 3D matrix can develop antimicrobial resistance (AMR), thus making it a problem with challenging solutions. Therefore, it is of concern the introduction in the medical practice involving biomaterials for ear, nose and throat (ENT) devices, such as implants for the trachea (stents), ear (cochlear implants), and voice recovery (voice prosthetics). The surface of these materials must be biocompatible and limit the development of biofilm while still promoting regeneration. In this respect, several surface modification techniques and functionalization procedures can be utilized to facilitate the success of the implants and ensure a long time of use. On this note, this review provides information on the intricate underlying mechanisms of biofilm formation, the large specter of implants and prosthetics that are susceptible to microbial colonization and subsequently related infections. Specifically, the discussion is particularized on biofilm development on ENT devices, ways to reduce it, and recent approaches that have emerged in this field.

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“…Simplistically, this system can be represented in a mechanical form that is externally combined with the human body in order to extensively enhance the wearer's muscle power [1]. The feature of exoskeleton robots prompts their use in four different types of applications [2]: medical [3][4][5], military [6,7], industrial [8][9][10] and consumer [11,12] applications. Interestingly, exoskeleton robots can be categorized based on the muscle supporting body-part into four types [13], as lower limb (incorporates hips, thigh, knee, and ankle muscles) [14][15][16], upper limb (includes shoulder and elbow muscles) [17][18][19][20], upper and lower integrated [21,22], and any specific body organ supportive part (i.e., finger muscles) [23,24].…”

Section: Introductionmentioning

confidence: 99%

Investigation of 2DOF PID Controller for Physio-Therapeutic Application for Elbow Rehabilitation

et al. 2021

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The aim of this work is to evaluate the output of a two-degree of freedom (DOF) proportional integral derivative (PID) controller for controlling elbow flexion and extension on an upper limb rehabilitation robot of an existing model. Since the usage of upper limb rehabilitation is increasing dramatically because of human impairment, 2DOF has been proposed in this work as a suitable controller. The 2DOF PID controller offers set-point-weight features and, hence, is fast in removing disturbance from the system and ensuring system stability. Importantly, as the system parameters are unknown in this work, the black-box model approach has been taken into consideration, using the MATLAB System identification toolbox to estimate a model. The best-fitted estimated model is then coupled with the proposed controller in the MATLAB/Simulink environment that, upon successful simulation works, leads, finally, to the hardware implementation. Three different amplitudes of sinusoidal current signals, such as 0.3 amps, 0.2 amps, and 0.1 amps, are applied for hardware measurements. Considering patients’ physical conditions. In this work, the 2DOF controller offers a fast transient response, settling time, negligible tracking error and 0% overshoot and undershoot.

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Additive Manufacturing Systems for Medical Applications: Case Studies

Cited by 10 publications

References 10 publications

Additive Manufacturing: Post Processing Methods and Challenges

Additive Manufacturing: Post Processing Methods and Challenges

Preventing Biofilm Formation and Development on Ear, Nose and Throat Medical Devices

Investigation of 2DOF PID Controller for Physio-Therapeutic Application for Elbow Rehabilitation

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