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Gianpaolo Savio
Department of Civil Environmental and Building Engineering University of Padova Padova Italy

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Special issue article
Published: 24 April 2021 in International Journal of Applied Glass Science
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The cooling of a melt corresponding to the eutectic between wollastonite (CaSiO3) and diopside (CaMgSi2O6) determines the synthesis of an interesting example of alkali‐free bioactive glass, easily converted into glass‐ceramics featuring two silicate phases, coupled also with åkermanite (Ca2MgSi2O7), by sinter‐crystallization of fine glass powders at 1000°C. The fabrication of scaffolds by digital light processing of glass powders suspended in a photo‐curable, sacrificial binder, is a well‐established technique; the present paper aims at disclosing novel approaches, concerning the topology of scaffolds, offering components with remarkable strength, especially in bending conditions. As an alternative, glass‐ceramic foams were fabricated by the firing of porous precursors derived from the gelation of suspensions of glass powders in alkali‐free basic aqueous solution.

ACS Style

Hamada Elsayed; Patricia Rabelo Monich; Gianpaolo Savio; Malte Hartmann; Aldo R. Boccaccini; Dusan Galusek; Jozef Kraxner; Enrico Bernardo. Alkali‐free processing of advanced open‐celled sinter‐crystallized glass‐ceramics. International Journal of Applied Glass Science 2021, 1 .

AMA Style

Hamada Elsayed, Patricia Rabelo Monich, Gianpaolo Savio, Malte Hartmann, Aldo R. Boccaccini, Dusan Galusek, Jozef Kraxner, Enrico Bernardo. Alkali‐free processing of advanced open‐celled sinter‐crystallized glass‐ceramics. International Journal of Applied Glass Science. 2021; ():1.

Chicago/Turabian Style

Hamada Elsayed; Patricia Rabelo Monich; Gianpaolo Savio; Malte Hartmann; Aldo R. Boccaccini; Dusan Galusek; Jozef Kraxner; Enrico Bernardo. 2021. "Alkali‐free processing of advanced open‐celled sinter‐crystallized glass‐ceramics." International Journal of Applied Glass Science , no. : 1.

Journal article
Published: 13 March 2021 in Applied Sciences
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Additive Manufacturing (AM) brought a revolution in parts design and production. It enables the possibility to obtain objects with complex geometries and to exploit structural optimization algorithms. Nevertheless, AM is far from being a mature technology and advances are still needed from different perspectives. Among these, the literature highlights the need of improving the frameworks that describe the design process and taking full advantage of the possibilities offered by AM. This work aims to propose a workflow for AM guiding the designer during the embodiment design phase, from the engineering requirements to the production of the final part. The main aspects are the optimization of the dimensions and the topology of the parts, to take into consideration functional and manufacturing requirements, and to validate the geometric model by computer-aided engineering software. Moreover, a case study dealing with the redesign of a piston rod is presented, in which the proposed workflow is adopted. Results show the effectiveness of the workflow when applied to cases in which structural optimization could bring an advantage in the design of a part and the pros and cons of the choices made during the design phases were highlighted.

ACS Style

Stefano Rosso; Federico Uriati; Luca Grigolato; Roberto Meneghello; Gianmaria Concheri; Gianpaolo Savio. An Optimization Workflow in Design for Additive Manufacturing. Applied Sciences 2021, 11, 2572 .

AMA Style

Stefano Rosso, Federico Uriati, Luca Grigolato, Roberto Meneghello, Gianmaria Concheri, Gianpaolo Savio. An Optimization Workflow in Design for Additive Manufacturing. Applied Sciences. 2021; 11 (6):2572.

Chicago/Turabian Style

Stefano Rosso; Federico Uriati; Luca Grigolato; Roberto Meneghello; Gianmaria Concheri; Gianpaolo Savio. 2021. "An Optimization Workflow in Design for Additive Manufacturing." Applied Sciences 11, no. 6: 2572.

Journal article
Published: 20 January 2021 in Applied Sciences
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The introduction of digital workflows and their combination with miniscrew assisted appliances has opened new and enthusiastic perspectives in modern orthodontics. However, in all digital workflows currently in use for orthodontic tooth movement, the miniscrews are inserted first in the maxillary bone, often by means of a surgical guide, and then the appliance is fabricated and secured over the miniscrews with different fixation mechanisms. By doing so, some adaptation problems can be encountered while securing the appliance over the miniscrews, and the chairside time required can therefore be significant. In the present study, we introduce a digital workflow for the design and fabrication of a new appliance, customized on the individual morphology of maxillary bone by using patient Cone Beam Computed Tomography CBCT, for sagittal and vertical orthodontic tooth movement (DIVA, divergent anchors). Differently from the existing protocols, the appliance is cemented first intraorally, serving as a surgical guide for the subsequent insertion of miniscrews. In this way, the adaptation problems are avoided and the chair-side time is reduced.

ACS Style

Daniele Cantarella; Vincenzo Quinzi; Lorena Karanxha; Paolo Zanata; Gianpaolo Savio; Massimo Del Fabbro. Digital Workflow for 3D Design and Additive Manufacturing of a New Miniscrew-Supported Appliance for Orthodontic Tooth Movement. Applied Sciences 2021, 11, 928 .

AMA Style

Daniele Cantarella, Vincenzo Quinzi, Lorena Karanxha, Paolo Zanata, Gianpaolo Savio, Massimo Del Fabbro. Digital Workflow for 3D Design and Additive Manufacturing of a New Miniscrew-Supported Appliance for Orthodontic Tooth Movement. Applied Sciences. 2021; 11 (3):928.

Chicago/Turabian Style

Daniele Cantarella; Vincenzo Quinzi; Lorena Karanxha; Paolo Zanata; Gianpaolo Savio; Massimo Del Fabbro. 2021. "Digital Workflow for 3D Design and Additive Manufacturing of a New Miniscrew-Supported Appliance for Orthodontic Tooth Movement." Applied Sciences 11, no. 3: 928.

Review article
Published: 23 November 2020 in Materials Advances
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Additive manufacturing has the potential to replace costly and cumbersome traditional techniques even in the fabrication of sub-millimetre devices. Microfluidic and catalytic materials will soon be fabricated by scientists in their own labs.

ACS Style

Andrea Rogolino; Gianpaolo Savio. Trends in additively manufactured microfluidics, microreactors and catalytic materials. Materials Advances 2020, 2, 845 -855.

AMA Style

Andrea Rogolino, Gianpaolo Savio. Trends in additively manufactured microfluidics, microreactors and catalytic materials. Materials Advances. 2020; 2 (3):845-855.

Chicago/Turabian Style

Andrea Rogolino; Gianpaolo Savio. 2020. "Trends in additively manufactured microfluidics, microreactors and catalytic materials." Materials Advances 2, no. 3: 845-855.

Short original paper
Published: 22 October 2020 in International Journal on Interactive Design and Manufacturing (IJIDeM)
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Demand for innovation represents a driver not only in the industrial field but also in niche markets such as orthodontics. Among different type of orthodontic devices, functional appliances are used for the correction of class II skeletal malocclusion, mostly in young patients. In a previous study based on a systematic design approach, several concepts were generated for this device. This work shortly introduces the concept selection and the interactive design process of the device. The concept consisting of two-side guiding surfaces, obtained by TRIZ inventive principles, has been selected by the decision matrix. This concept consists in guiding the jaw movements without any connections between the parts of the device. Operating on patient morphometrics parameters, the proposed approach allows to establish a virtual interaction during the design of the device by facilitating the collaboration between orthodontist, dental technician, designer and the software, through a dedicated user interface. Dedicated algorithms were also developed to simulate the occlusion correction and the mandible path, and to support the geometric modelling in a virtual environment. As a result, the proposed approach allows manufacturing patient-customized devices using a digital interactive workflow in an innovative way.

ACS Style

Luca Grigolato; Stefano Filippi; Daniele Cantarella; Roberta Lione; Won Moon; Stefano Rosso; Roberto Meneghello; Gianmaria Concheri; Gianpaolo Savio. Concept selection and interactive design of an orthodontic functional appliance. International Journal on Interactive Design and Manufacturing (IJIDeM) 2020, 15, 137 -142.

AMA Style

Luca Grigolato, Stefano Filippi, Daniele Cantarella, Roberta Lione, Won Moon, Stefano Rosso, Roberto Meneghello, Gianmaria Concheri, Gianpaolo Savio. Concept selection and interactive design of an orthodontic functional appliance. International Journal on Interactive Design and Manufacturing (IJIDeM). 2020; 15 (1):137-142.

Chicago/Turabian Style

Luca Grigolato; Stefano Filippi; Daniele Cantarella; Roberta Lione; Won Moon; Stefano Rosso; Roberto Meneghello; Gianmaria Concheri; Gianpaolo Savio. 2020. "Concept selection and interactive design of an orthodontic functional appliance." International Journal on Interactive Design and Manufacturing (IJIDeM) 15, no. 1: 137-142.

Original article
Published: 30 August 2020 in The International Journal of Advanced Manufacturing Technology
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Soundness of additively manufactured parts depends on a lot of process and geometrical parameters. A wrong process design leads to defects such as lack of fusion or keyhole porosity that have a detrimental effect on the mechanical properties of the printed parts. Process parameter optimization is thus a formidable challenge that requires in general a huge amount of experimental data. Among the others, heat source power and scan speed are the most defects-affecting parameters to be optimized. The energy density is used in literature to quantify their combination. Unfortunately, in different works it was demonstrated that it fails if used as design parameter mainly because it does not take into account the material properties and the interaction between heat source and the powder bed. In this contribution, a modified volumetric energy density equation that takes into account the powder-heat source interaction to optimize the combination of power-scan speed values for porosity assessment in powder bed fusion process design is proposed and verified on both AlSi10Mg alloy and Maraging steel 300.

ACS Style

Paolo Ferro; Roberto Meneghello; Gianpaolo Savio; Filippo Berto. A modified volumetric energy density–based approach for porosity assessment in additive manufacturing process design. The International Journal of Advanced Manufacturing Technology 2020, 110, 1 -11.

AMA Style

Paolo Ferro, Roberto Meneghello, Gianpaolo Savio, Filippo Berto. A modified volumetric energy density–based approach for porosity assessment in additive manufacturing process design. The International Journal of Advanced Manufacturing Technology. 2020; 110 (7-8):1-11.

Chicago/Turabian Style

Paolo Ferro; Roberto Meneghello; Gianpaolo Savio; Filippo Berto. 2020. "A modified volumetric energy density–based approach for porosity assessment in additive manufacturing process design." The International Journal of Advanced Manufacturing Technology 110, no. 7-8: 1-11.

Journal article
Published: 01 August 2020 in Journal of Computer Science
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Polygonal meshes have a significant role in computer graphics, design and manufacturing technology for surface representation and it is often required to reduce their complexity to save memory. An efficient algorithm for detail retaining mesh simplification is proposed; in particular, the method presented is an iterative edge contraction algorithm based on the work of Garland and Heckberts. The original algorithm is improved by enhancing the quadratic error metrics with a penalizing factor based on discrete Gaussian curvature, which is estimated efficiently through the Gauss-Bonnet theorem, to account for the presence of fine details during the edge decimation process. Experimental results show that this new algorithm helps preserve the visually salient features of the model without compromising performance.

ACS Style

Paolo Pellizzoni; Gianpaolo Savio. Mesh Simplification by Curvature-Enhanced Quadratic Error Metrics. Journal of Computer Science 2020, 16, 1195 -1202.

AMA Style

Paolo Pellizzoni, Gianpaolo Savio. Mesh Simplification by Curvature-Enhanced Quadratic Error Metrics. Journal of Computer Science. 2020; 16 (8):1195-1202.

Chicago/Turabian Style

Paolo Pellizzoni; Gianpaolo Savio. 2020. "Mesh Simplification by Curvature-Enhanced Quadratic Error Metrics." Journal of Computer Science 16, no. 8: 1195-1202.

Conference paper
Published: 10 July 2020 in Transactions on Petri Nets and Other Models of Concurrency XV
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In the orthodontic field, UX concerns can take an important role in boosting innovation from the designers, engineers, dentists, dental technicians and patients’ points of view. In the last months, these concerns spread over the development of functional orthodontic appliances for the correction of skeletal class II malocclusions. This paper focuses on two phases: the data collection before starting the development and the evaluation of the design results. The UX concerns developed through the involvement of the Quality Function Deployment and the irMMs-based UX evaluation method 2.0, including the meQUE questionnaire 2.0. This paper describes the UX role, the related activities and the impact of its involvement in the design process.

ACS Style

Stefano Filippi; Luca Grigolato; Gianpaolo Savio. UX Concerns in Developing Functional Orthodontic Appliances. Transactions on Petri Nets and Other Models of Concurrency XV 2020, 229 -241.

AMA Style

Stefano Filippi, Luca Grigolato, Gianpaolo Savio. UX Concerns in Developing Functional Orthodontic Appliances. Transactions on Petri Nets and Other Models of Concurrency XV. 2020; ():229-241.

Chicago/Turabian Style

Stefano Filippi; Luca Grigolato; Gianpaolo Savio. 2020. "UX Concerns in Developing Functional Orthodontic Appliances." Transactions on Petri Nets and Other Models of Concurrency XV , no. : 229-241.

Journal article
Published: 01 July 2020 in The Journal of Prosthetic Dentistry
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The marginal gap and ceramic bond strength of metal-ceramic restorations are important for success. However, studies evaluating the marginal gap and ceramic bond strength of fixed partial dentures (FPDs) produced with 3D printing technologies such as selective laser melting (SLM) are scarce. The purpose of this in vitro study was to investigate the marginal gap of cobalt-chromium (Co-Cr) alloy frameworks produced by SLM technology before and after ceramic firing. Additionally, the metal-ceramic bond strength was evaluated with the Schwickerath crack-initiation test according to the International Standards Organization (ISO) 9693-1:2012. Conventional impressions were made, and the definitive cast of a patient requiring a 4-unit FPD was scanned. After designing the FPD, the files were sent to a service center for the fabrication of a metal master model, 80 Co-Cr frameworks, and 80 flat specimens (25×3×0.5 mm) with SLM technology. The marginal gap between frameworks and the abutment tooth of the metal master model was nondestructively measured by using an optical coordinate-measuring machine. A total of 80 sets, consisting of 1 framework and 1 flat specimen, were sent to 80 dental laboratory technicians for ceramic firing. Detailed instructions for correct manipulation of the framework and flat specimen were provided. The marginal gap was remeasured, and the 3-point bend test was used to evaluate metal-ceramic bond strength. Only 28 of the 80 dental technicians returned the specimens within a prespecified time and/or in adequate condition. The mean ±standard deviation marginal gap of the framework before ceramic firing was 25 ±9 μm and 34 ±12 μm after firing. The difference was statistically significant (P=.001). The mean ±standard deviation 3-point bend strength was 33 ±9 MPa. Ceramic firing affected the marginal gap; however, all Co-Cr frameworks had a marginal gap lower than 120 μm, which is reported to be a clinically acceptable limit. Most of the specimens (80%) had a metal-ceramic bond strength value higher than the 25-MPa ISO 9693 requirement. Five of 28 dental laboratory technicians were not able to comply with ceramic firing instructions.

ACS Style

Adolfo Di Fiore; Gianpaolo Savio; Edoardo Stellini; Paolo Vigolo; Carlo Monaco; Roberto Meneghello. Influence of ceramic firing on marginal gap accuracy and metal-ceramic bond strength of 3D-printed Co-Cr frameworks. The Journal of Prosthetic Dentistry 2020, 124, 75 -80.

AMA Style

Adolfo Di Fiore, Gianpaolo Savio, Edoardo Stellini, Paolo Vigolo, Carlo Monaco, Roberto Meneghello. Influence of ceramic firing on marginal gap accuracy and metal-ceramic bond strength of 3D-printed Co-Cr frameworks. The Journal of Prosthetic Dentistry. 2020; 124 (1):75-80.

Chicago/Turabian Style

Adolfo Di Fiore; Gianpaolo Savio; Edoardo Stellini; Paolo Vigolo; Carlo Monaco; Roberto Meneghello. 2020. "Influence of ceramic firing on marginal gap accuracy and metal-ceramic bond strength of 3D-printed Co-Cr frameworks." The Journal of Prosthetic Dentistry 124, no. 1: 75-80.

Journal article
Published: 17 June 2020 in Applied Sciences
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Background: resin-bonded fixed dental prosthesis (RBFDP) represents a highly aesthetic and conservative treatment option to replace a single tooth in a younger patient. The purpose of this in vitro study was to compare the fracture strength and the different types of failure on anterior cantilever RBFDPs fabricated using zirconia (ZR), lithium disilicate (LD), and PMMA-based material with ceramic fillers (PM) by the same standard tessellation language (STL) file. Methods: sixty extracted bovine mandibular incisives were embedded resin block; scanned to design one master model of RBFDP with a cantilevered single-retainer. Twenty cantilevered single-retainer RBFDPs were fabricated using ZR; LD; and PM. Static loading was performed using a universal testing machine. Results: the mean fracture strength for the RBFDPs was: 292.5 Newton (Standard Deviation (SD) 36.6) for ZR; 210 N (SD 37.6) for LD; and 133 N (SD 16.3) for PM. All the failures of RBFDPs in ZR were a fracture of the abutment tooth; instead; the 80% of failures of RBFDPs in LD and PM were a fracture of the connector. Conclusion: within the limitations of this in vitro study, we can conclude that the zirconia RBFDPs presented load resistance higher than the maximum anterior bite force reported in literature (270 N) and failure type analysis showed some trends among the groups

ACS Style

Adolfo Di Fiore; Edoardo Stellini; Gianpaolo Savio; Stefano Rosso; Lorenzo Graiff; Stefano Granata; Carlo Monaco; Roberto Meneghello. Assessment of the Different Types of Failure on Anterior Cantilever Resin-Bonded Fixed Dental Prostheses Fabricated with Three Different Materials: An In Vitro Study. Applied Sciences 2020, 10, 4151 .

AMA Style

Adolfo Di Fiore, Edoardo Stellini, Gianpaolo Savio, Stefano Rosso, Lorenzo Graiff, Stefano Granata, Carlo Monaco, Roberto Meneghello. Assessment of the Different Types of Failure on Anterior Cantilever Resin-Bonded Fixed Dental Prostheses Fabricated with Three Different Materials: An In Vitro Study. Applied Sciences. 2020; 10 (12):4151.

Chicago/Turabian Style

Adolfo Di Fiore; Edoardo Stellini; Gianpaolo Savio; Stefano Rosso; Lorenzo Graiff; Stefano Granata; Carlo Monaco; Roberto Meneghello. 2020. "Assessment of the Different Types of Failure on Anterior Cantilever Resin-Bonded Fixed Dental Prostheses Fabricated with Three Different Materials: An In Vitro Study." Applied Sciences 10, no. 12: 4151.

Originalpaper
Published: 01 May 2020 in Physical Mesomechanics
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Additive manufacturing techniques are known for the unrivalled geometric freedom they offer to designers. It is one of the mainstays of “metal 3D-printing”, compared to casting, which, in contrast, implies more restrictions because some shapes do not cool evenly or may need moulds or forms. Despite the possible presence of defects inside additive manufactured components, such as oxide films, pores or unmelted powder, they can be strongly reduced or controlled by process parameters optimization. That seems not true for a casting component, in which defects can vary a lot from zone to zone according to the solidification conditions. Porosity inducing process parameters in selective laser melted AlSi10Mg aluminium alloy are carefully analysed with the aim to find optimal conditions that guarantee the maximum material density and the best mechanical properties. Finally, a model is proposed that correlates the amount of pores with the alloy ultimate tensile strength.

ACS Style

P. Ferro; R. Meneghello; S. M. J. Razavi; F. Berto; Gianpaolo Savio. Porosity Inducing Process Parameters in Selective Laser Melted AlSi10Mg Aluminium Alloy. Physical Mesomechanics 2020, 23, 256 -262.

AMA Style

P. Ferro, R. Meneghello, S. M. J. Razavi, F. Berto, Gianpaolo Savio. Porosity Inducing Process Parameters in Selective Laser Melted AlSi10Mg Aluminium Alloy. Physical Mesomechanics. 2020; 23 (3):256-262.

Chicago/Turabian Style

P. Ferro; R. Meneghello; S. M. J. Razavi; F. Berto; Gianpaolo Savio. 2020. "Porosity Inducing Process Parameters in Selective Laser Melted AlSi10Mg Aluminium Alloy." Physical Mesomechanics 23, no. 3: 256-262.

Journal article
Published: 17 April 2020 in Theoretical and Applied Fracture Mechanics
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Additive manufacturing is an emerging technique that is not only subjected to the interest of academic world because of its peculiar characteristics to obtain new material properties and optimized 3D geometries, but it also finds the interest of the industrial sector because of the possibility to build advanced components never realized until now. Among the additive manufacturing processes, Laser Powder Bed Fusion process is perhaps the most used in producing components out of metallic materials. In particular, thanks to its low density and its hypoeutectic favourable composition, AlSi10Mg alloy is particular suitable for the production of lightweight components by additive manufacturing. However, for safety reasons, their mechanical, static and cyclic, characteristics need to be well understood and predicted. Unfortunately, they are dramatically influenced by process parameters that in turn may promote killer defects dangerous for the fatigue strength of load bearing mechanical components. This contribution is aimed at highlighting the influence of defects on the fatigue resistance of AlSi10Mg samples produced by laser powder bed fusion. The combination of process parameters were obtained that maximizes the fatigue strength and reduces the scattering of the results.

ACS Style

Paolo Ferro; Alberto Fabrizi; Filippo Berto; Gianpaolo Savio; Roberto Meneghello; Stefano Rosso. Defects as a root cause of fatigue weakening of additively manufactured AlSi10Mg components. Theoretical and Applied Fracture Mechanics 2020, 108, 102611 .

AMA Style

Paolo Ferro, Alberto Fabrizi, Filippo Berto, Gianpaolo Savio, Roberto Meneghello, Stefano Rosso. Defects as a root cause of fatigue weakening of additively manufactured AlSi10Mg components. Theoretical and Applied Fracture Mechanics. 2020; 108 ():102611.

Chicago/Turabian Style

Paolo Ferro; Alberto Fabrizi; Filippo Berto; Gianpaolo Savio; Roberto Meneghello; Stefano Rosso. 2020. "Defects as a root cause of fatigue weakening of additively manufactured AlSi10Mg components." Theoretical and Applied Fracture Mechanics 108, no. : 102611.

Journal article
Published: 20 March 2020 in International Journal of Thermal Sciences
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The interest in Phase Change Materials (PCMs) has been continuously growing, since they were identified as a suitable way to store large quantities of thermal energy. Despite many PCMs being available on the market, almost all present a relatively low thermal conductivity, which limits the efficiency and the convenience of their use inside Latent Thermal Energy Storage (LTES) units. This paper proposes a novel method to overcome the low thermal conductivity drawback: additive manufacturing was used to realize three innovative 3D metallic periodic structures, with different base pore sizes (10, 20, and 40 mm) and constant porosity, to be filled with a suitable PCM. The samples were experimentally tested by analyzing the temperature field in a paraffin wax, which has a melting temperature of around 55 °C. Furthermore, several videos and images were taken during the charging (i.e. heating and melting) process, obtained by electrical heating (three heat fluxes corresponding to 10, 20, and 30 W were applied) and the discharging (i.e. solidification and cooling) process, where the heat was only rejected by natural convection with ambient still air. The coupling of PCMs and aluminum structures was demonstrated to enhance both the charging and the discharging processes.

ACS Style

Giulia Righetti; Gianpaolo Savio; Roberto Meneghello; Luca Doretti; Simone Mancin. Experimental study of phase change material (PCM) embedded in 3D periodic structures realized via additive manufacturing. International Journal of Thermal Sciences 2020, 153, 106376 .

AMA Style

Giulia Righetti, Gianpaolo Savio, Roberto Meneghello, Luca Doretti, Simone Mancin. Experimental study of phase change material (PCM) embedded in 3D periodic structures realized via additive manufacturing. International Journal of Thermal Sciences. 2020; 153 ():106376.

Chicago/Turabian Style

Giulia Righetti; Gianpaolo Savio; Roberto Meneghello; Luca Doretti; Simone Mancin. 2020. "Experimental study of phase change material (PCM) embedded in 3D periodic structures realized via additive manufacturing." International Journal of Thermal Sciences 153, no. : 106376.

Methodology
Published: 01 March 2020 in Medical Devices: Evidence and Research
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Introduction: Miniscrew-assisted rapid palatal expansion (MARPE) appliances utilize the skeletal anchorage to expand the maxilla. One type of MARPE device is the Maxillary Skeletal Expander (MSE), which presents four micro-implants with bicortical engagement of the palatal vault and nasal floor. MSE positioning is traditionally planned using dental stone models and 2D headfilms. This approach presents some critical issues, such as the inability to identify the MSE position relative to skeletal structures, and the potential risk of damaging anatomical structures. Methods: A novel methodology has been developed to plan MSE position using the digital model of dental arches and cone-beam computed tomography (CBCT). A virtual model of MSE appliance with the four micro-implants was created. After virtual planning, a positioning guide is virtually designed, 3D printed, and utilized to model and weld the MSE supporting arms to the molar bands. The expansion device is then cemented in the patient oral cavity and micro-implants inserted. A clinical case of a 12.9-year-old female patient presenting a Class III malocclusion with transverse and sagittal maxillary deficiency is reported. Results: The midpalatal suture was opened with a split of 3.06 mm and 2.8 mm at the anterior and posterior nasal spine, respectively. After facemask therapy, the sagittal skeletal relationship was improved, as shown by the increase in ANB, A-Na perpendicular and Wits cephalometric parameters, and the mandibular plane rotated 1.6° clockwise. Conclusion: The proposed digital methodology represents an advancement in the planning of MSE positioning, compared to the traditional approach. By evaluating the bone morphology of the palate and midface on patient CBCT, the placement of MSE is improved regarding the biomechanics of maxillary expansion and the bone thickness at micro-implants insertion sites. In the present case report, the digital planning was associated with a positive outcome of maxillary expansion and protraction in safety conditions.

ACS Style

Daniele Cantarella; Gianpaolo Savio; Luca Grigolato; Paolo Zanata; Chiara Berveglieri; Antonino Lo Giudice; Gaetano Isola; Massimo Del Fabbro; Won Moon. A New Methodology for the Digital Planning of Micro-Implant-Supported Maxillary Skeletal Expansion. Medical Devices: Evidence and Research 2020, ume 13, 93 -106.

AMA Style

Daniele Cantarella, Gianpaolo Savio, Luca Grigolato, Paolo Zanata, Chiara Berveglieri, Antonino Lo Giudice, Gaetano Isola, Massimo Del Fabbro, Won Moon. A New Methodology for the Digital Planning of Micro-Implant-Supported Maxillary Skeletal Expansion. Medical Devices: Evidence and Research. 2020; ume 13 ():93-106.

Chicago/Turabian Style

Daniele Cantarella; Gianpaolo Savio; Luca Grigolato; Paolo Zanata; Chiara Berveglieri; Antonino Lo Giudice; Gaetano Isola; Massimo Del Fabbro; Won Moon. 2020. "A New Methodology for the Digital Planning of Micro-Implant-Supported Maxillary Skeletal Expansion." Medical Devices: Evidence and Research ume 13, no. : 93-106.

Review
Published: 14 December 2019 in Instant Journal of Mechanical Engineering
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Recent advances in additive manufacturing technologies demand for extremely customized, complex shape and multi-fold functional products. Heterogeneous objects, such as functionally graded materials, represent an attractive solution for researchers and industries in many application fields. Combining geometric modelling and material assignment in a definitive and accessible CAD tool is still a challenge. In this review the key aspects of heterogenous object representation related to additive manufacturing processes are reported. After the presentation of the various methodologies for geometric modelling found in the literature, additive manufacturing applications for heterogeneous objects are summarized. Keywords: Geometric modeling; Computational geometry; Additive manufacturing; CAD; FGM; Heterogeneous objects

ACS Style

Luca Grigolato; Stefano Rosso; Roberto Meneghello; Gianmaria Concheri; Gianpaolo Savio. Heterogeneous objects representation for Additive Manufacturing: a review. Instant Journal of Mechanical Engineering 2019, 1, 14 -23.

AMA Style

Luca Grigolato, Stefano Rosso, Roberto Meneghello, Gianmaria Concheri, Gianpaolo Savio. Heterogeneous objects representation for Additive Manufacturing: a review. Instant Journal of Mechanical Engineering. 2019; 1 (1):14-23.

Chicago/Turabian Style

Luca Grigolato; Stefano Rosso; Roberto Meneghello; Gianmaria Concheri; Gianpaolo Savio. 2019. "Heterogeneous objects representation for Additive Manufacturing: a review." Instant Journal of Mechanical Engineering 1, no. 1: 14-23.

Journal article
Published: 12 October 2019 in Veterinary Record
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Aims: The purpose of the study was to evaluate the accuracy of a three-dimensional (3D) automated technique (computer-aided design (aCAD)) for the measurement of three canine femoral angles: anatomical lateral distal femoral angle (aLDFA), femoral neck angle (FNA) and femoral torsion angle. Methods:Twenty-eight femurs equally divided intotwo groups (normal and abnormal) were obtained from 14 dogs of different conformations (dolicomorphic and chondrodystrophicCT scans and 3D scanner acquisitions were used to create stereolithographic (STL) files, which were run in a CAD platform. Two blinded observers separately performed the measurements using the STL obtained from CT scans (CT aCAD) and 3D scanner (3D aCAD), which was considered the gold standard method. C orrelation coefficients were used to investigate the strength of the relationship between the two measurements. Results: A ccuracy of the aCAD computation was good, being always above the threshold of R2 of greater than 80 per cent for all three angles assessed in both groups. a LDFA and FNA were the most accurate angles (accuracy >90 per cent). Conclusions: The proposed 3D aCAD protocol can be considered a reliable technique to assess femoral angle measurements in canine femur. The developed algorithm automatically calculates the femoral angles in 3D, thus considering the subjective intrinsic femur morphology. The main benefit relies on a fast user-independent computation, which avoids user-related measurement variability. The accuracy of 3D details may be helpful for patellar luxation and femoral bone deformity correction, as well as for the design of patient- specific, custom-made hip prosthesis implants.

ACS Style

Federico Longo; Gianpaolo Savio; Barbara Contiero; Roberto Meneghello; Gianmaria Concheri; Federico Franchini; Maurizio Isola. Accuracy of an automated three-dimensional technique for the computation of femoral angles in dogs. Veterinary Record 2019, 185, 443 -443.

AMA Style

Federico Longo, Gianpaolo Savio, Barbara Contiero, Roberto Meneghello, Gianmaria Concheri, Federico Franchini, Maurizio Isola. Accuracy of an automated three-dimensional technique for the computation of femoral angles in dogs. Veterinary Record. 2019; 185 (14):443-443.

Chicago/Turabian Style

Federico Longo; Gianpaolo Savio; Barbara Contiero; Roberto Meneghello; Gianmaria Concheri; Federico Franchini; Maurizio Isola. 2019. "Accuracy of an automated three-dimensional technique for the computation of femoral angles in dogs." Veterinary Record 185, no. 14: 443-443.

Conference paper
Published: 20 September 2019 in Recent Advances in Computational Mechanics and Simulations
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The freedom in geometry given by additive manufacturing allows to produce cellular materials, also called lattice structures, with unit cells and mesoscale features that are impossible to obtain with traditional manufacturing techniques. The geometric modeling of lattice structures still presents issues such as robustness and automation, but, with a novel modeling approach based on subdivision surface algorithm, these troubles were limited. Furthermore, the subdivision method smooths surfaces, avoiding sharp edges at nodal points and increasing performances in fatigue properties. The aim of this work is twofold; a. The subdivision surface method is validated through fatigue tests on specimen additively manufactured by selective laser melting technology in SS316L stainless steel; dynamic tests were carried out on two types of lattice structures based on cubic cell: one obtained with a traditional modeling method, one obtained with a subdivision surface approach. b. Additional tests on bulk cylindrical samples, allowed to propose a preliminary model that describes the fatigue behaviour of additively manufactured lattices as a function of the bulk material properties, considering the shape and scale effects coming from stress concentration factor, increased area, surface roughness and porosity of the part. Results show that the subdivision surface approach improves the fatigue life of lattice structures, as expected. More, the lattices have a worse fatigue life compared to the bulk samples due to the scale and shape effects, that results in a higher sensibility to surface and internal defects related to the manufacturing process.

ACS Style

Stefano Rosso; Roberto Meneghello; Gianmaria Concheri; Gianpaolo Savio. Scale and Shape Effects on the Fatigue Behaviour of Additively Manufactured SS316L Structures: A Preliminary Study. Recent Advances in Computational Mechanics and Simulations 2019, 879 -890.

AMA Style

Stefano Rosso, Roberto Meneghello, Gianmaria Concheri, Gianpaolo Savio. Scale and Shape Effects on the Fatigue Behaviour of Additively Manufactured SS316L Structures: A Preliminary Study. Recent Advances in Computational Mechanics and Simulations. 2019; ():879-890.

Chicago/Turabian Style

Stefano Rosso; Roberto Meneghello; Gianmaria Concheri; Gianpaolo Savio. 2019. "Scale and Shape Effects on the Fatigue Behaviour of Additively Manufactured SS316L Structures: A Preliminary Study." Recent Advances in Computational Mechanics and Simulations , no. : 879-890.

Conference paper
Published: 20 September 2019 in Lecture Notes in Mechanical Engineering
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The current requests for continuous innovation represent a challenge in every industry as well as in the field of orthodontics. Aim of this work was to develop new concepts of a functional appliance for the correction of class II skeletal malocclusion through a systematic design methodology. Staring at the existing devices in this field, taking into account the literature and the patient’s needs, the customers’ requirements were identified by Quality Functional Deployment. Systematic methods such as morphological method, theory of inventive problem solving and other creative methods were used for generating concepts some of which are presented at the end of the paper.

ACS Style

Luca Grigolato; Stefano Filippi; Daniela Barattin; Daniele Cantarella; Won Moon; Roberto Meneghello; Gianmaria Concheri; Gianpaolo Savio. Conceptual Design of a Functional Orthodontic Appliance for the Correction of Skeletal Class II Malocclusion. Lecture Notes in Mechanical Engineering 2019, 329 -341.

AMA Style

Luca Grigolato, Stefano Filippi, Daniela Barattin, Daniele Cantarella, Won Moon, Roberto Meneghello, Gianmaria Concheri, Gianpaolo Savio. Conceptual Design of a Functional Orthodontic Appliance for the Correction of Skeletal Class II Malocclusion. Lecture Notes in Mechanical Engineering. 2019; ():329-341.

Chicago/Turabian Style

Luca Grigolato; Stefano Filippi; Daniela Barattin; Daniele Cantarella; Won Moon; Roberto Meneghello; Gianmaria Concheri; Gianpaolo Savio. 2019. "Conceptual Design of a Functional Orthodontic Appliance for the Correction of Skeletal Class II Malocclusion." Lecture Notes in Mechanical Engineering , no. : 329-341.

Conference paper
Published: 20 September 2019 in Lecture Notes in Mechanical Engineering
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Additive manufacturing technology offers new design possibilities compared to traditional casting processes applied to metallic materials. Not only there are no limits in shape, but a higher microstructure control is allowed compared to traditional processes. Irrespective of the sample dimensions, the solidification defects induced by SLM process depend only on process parameters and do not vary from zone to zone of the component like in a casting component: the higher the casting dimensions and thickness variations, the lower the microstructure homogeneity resulting from different cooling conditions inside the casting itself. The effect of process parameters on porosity, in selective laser melted AlSi10Mg aluminium alloy, is carefully analysed with the aim to find optimal conditions that guarantee the maximum material density and the best mechanical properties.

ACS Style

Federico Uriati; Filippo Da Rin Betta; Paolo Ferro; Stefano Rosso; Gianpaolo Savio; Gianmaria Concheri; Roberto Meneghello. High Density AlSi10Mg Aluminium Alloy Specimens Obtained by Selective Laser Melting. Lecture Notes in Mechanical Engineering 2019, 871 -878.

AMA Style

Federico Uriati, Filippo Da Rin Betta, Paolo Ferro, Stefano Rosso, Gianpaolo Savio, Gianmaria Concheri, Roberto Meneghello. High Density AlSi10Mg Aluminium Alloy Specimens Obtained by Selective Laser Melting. Lecture Notes in Mechanical Engineering. 2019; ():871-878.

Chicago/Turabian Style

Federico Uriati; Filippo Da Rin Betta; Paolo Ferro; Stefano Rosso; Gianpaolo Savio; Gianmaria Concheri; Roberto Meneghello. 2019. "High Density AlSi10Mg Aluminium Alloy Specimens Obtained by Selective Laser Melting." Lecture Notes in Mechanical Engineering , no. : 871-878.

Conference paper
Published: 26 July 2019 in Proceedings of the Design Society: International Conference on Engineering Design
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Nowadays, topology optimization and lattice structures are being re-discovered thanks to Additive Manufacturing technologies, that allow to easily produce parts with complex geometries.The primary aim of this work is to provide an original contribution for geometric modeling of conformal lattice structures for both wireframe and mesh models, improving previously presented methods. The secondary aim is to compare the proposed approaches with commercial software solutions on a piston rod as a case study.The central part of the rod undergoes size optimization of conformal lattice structure beams diameters using the proposed methods, and topology optimization using commercial software tool. The optimized lattice is modeled with a NURBS approach and with the novel mesh approach, while the topologically optimized part is manually remodeled to obtain a proper geometry. Results show that the lattice mesh modelling approach has the best performance, resulting in a lightweight structure with smooth surfaces and without sharp edges at nodes, enhancing mechanical properties and fatigue life.

ACS Style

Stefano Rosso; Gianpaolo Savio; Federico Uriati; Roberto Meneghello; Gianmaria Concheri. Optimization Approaches in Design for Additive Manufacturing. Proceedings of the Design Society: International Conference on Engineering Design 2019, 1, 809 -818.

AMA Style

Stefano Rosso, Gianpaolo Savio, Federico Uriati, Roberto Meneghello, Gianmaria Concheri. Optimization Approaches in Design for Additive Manufacturing. Proceedings of the Design Society: International Conference on Engineering Design. 2019; 1 (1):809-818.

Chicago/Turabian Style

Stefano Rosso; Gianpaolo Savio; Federico Uriati; Roberto Meneghello; Gianmaria Concheri. 2019. "Optimization Approaches in Design for Additive Manufacturing." Proceedings of the Design Society: International Conference on Engineering Design 1, no. 1: 809-818.