Article
Dentistry, Oral Surgery & Medicine
Ozlem Sivas Yilmaz, Cangul Keskin, Hikmet Aydemir
Summary: The R-Pilot glide path file exhibited the highest torsional strength among all groups, while the Rotate group had the lowest torsional strength. The Mtwo group showed the lowest angle of rotation. Differences in torsional resistance of the instruments may be related to their manufacturing methods and design features.
JOURNAL OF ENDODONTICS
(2021)
Article
Dentistry, Oral Surgery & Medicine
Jing-Yi Liu, Zhi-Xiong Zhou, Wei-Ju Tseng, Bekir Karabucak
Summary: In comparing manual and Optimum Glide Path (OGP) motion in preparing glide paths for constricted canals, it was found that OGP motion resulted in significantly less canal transportation and file distortion, while both methods exhibited similar centering abilities.
Article
Dentistry, Oral Surgery & Medicine
R. P. Pereira, M. P. Alcalde, M. A. H. Duarte, R. R. Vivan, C. E. S. Bueno, J. A. Duque, P. H. S. Calefi, C. M. Bramante
Summary: The study evaluated the performance of two reciprocating glide path systems, WO and RP, in creating a glide path in mesial root canals of mandibular molars and assessed the torsional resistance of instruments. The results showed that WO and RP instruments performed similarly in most aspects, with RP instruments having higher torsional strength and less angular deflection compared to WO. The study also found significant differences in angular deflection values between the new and used WO groups.
INTERNATIONAL ENDODONTIC JOURNAL
(2021)
Article
Dentistry, Oral Surgery & Medicine
Jorge N. R. Martins, Emmanuel Joao Nogueira Leal Silva, Duarte Marques, Natasha Ajuz, Mario Rito Pereira, Rui Pereira da Costa, Francisco Manuel Braz Fernandes, Marco Aurelio Versiani
Summary: This study compared the design, metallurgy, and mechanical performance of the ProTaper (PT) Ultimate system with similar instruments from the ProGlider, PT Gold, and PT Universal systems. The results showed that the PT Ultimate instruments had three distinct heat treatments and demonstrated lower torsional strength and higher flexibility compared to their counterparts.
INTERNATIONAL ENDODONTIC JOURNAL
(2023)
Article
Dentistry, Oral Surgery & Medicine
Emmanuel J. N. L. Silva, Natasha C. Ajuz, Jorge N. R. Martins, Bernardo R. Antunes, Carolina O. Lima, Victor T. L. Vieira, Francisco Manuel Braz-Fernandes, Marco A. Versiani
Summary: This study aimed to compare three rotary instruments produced by the EDM process with the heat-treated ProTaper Gold system regarding design, metallurgy, mechanical properties and shaping ability. The results showed that HyFlex EDM, Neoniti, and EDMax rotary instruments had similar designs, metallurgy, and mechanical performances when compared with ProTaper Gold. However, there were no differences in their shaping ability.
INTERNATIONAL ENDODONTIC JOURNAL
(2023)
Review
Chemistry, Physical
Israa Ashkar, Jose Luis Sanz, Leopoldo Forner
Summary: This systematic review aimed to qualitatively synthesize in vitro studies on the cyclic fatigue resistance of rotary glide path (GP) files. The results indicate that reciprocating rotation showed higher cyclic fatigue resistance, which may be influenced by various intrinsic and external factors.
Article
Dentistry, Oral Surgery & Medicine
Gustavo De-Deus, Milla Lessa Cardoso, Marco Simoes-Carvalho, Emmanuel J. N. L. Silva, Felipe Goncalves Belladonna, Daniele Moreira Cavalcante, Diogo da Silva Oliveira, Erick Miranda Souza, Ricardo Tadeu Lopes, Marco Aurelio Versiani
Summary: The R-Pilot instrument reached the WL in 89.10% of mandibular molar root canals, with fracture and deformation rates of 2.56% and 1.92%, respectively. The observed frequencies of fractures and deformations were significantly lower than expected frequencies.
JOURNAL OF ENDODONTICS
(2021)
Article
Dentistry, Oral Surgery & Medicine
Shimaa M. Hadwa, Rehab F. Ghouraba, Ibrahim A. Kabbash, Shaimaa S. EL-Desouky
Summary: This study compared different instrument systems for root canal preparation of primary teeth and found that rotary file systems resulted in better obturation quality, shorter instrumentation time, and less postoperative pain compared to manual K-files.
Article
Chemistry, Multidisciplinary
Aylin Islam, Gurkan Unsal, Alaa Almashharawi
Summary: The study evaluated the performance of RaceEvo, R-Motion, ProTaper Gold (PTG) systems in curved primary root canals using CBCT, with the PTG group showing significantly higher values in terms of canal transportation and volumetric dentin removal compared to other groups.
APPLIED SCIENCES-BASEL
(2021)
Article
Energy & Fuels
Rik Van Dyck, Alexandros Prapavesis, Tom Borgers, Jonathan Govaerts, Jef Poortmans, Aart W. van Vuure
Summary: The X-ray (micro-)computed tomography is a non-destructive and relatively fast visualization method for photovoltaic interconnection research. It can detect small cavities and display interconnection structures, providing valuable information for interconnection technology development.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Dentistry, Oral Surgery & Medicine
Myint Thu, Arata Ebihara, Keiichiro Maki, Miki Nishijo, Shunsuke Kimura, Taro Nakatsukasa, Moe Sandar Kyaw, Takashi Okiji
Summary: This study evaluated the effect of different metallurgy and faster upward speed pecking motions on the dynamic cyclic fatigue resistance of nickel-titanium rotary instruments. The results showed that the fastest upward speed group exhibited higher cyclic fatigue resistance, and ProTaper Gold instruments performed better in terms of fatigue resistance in all groups.
Article
Dentistry, Oral Surgery & Medicine
Myint Thu, Arata Ebihara, Keiichiro Maki, Shunsuke Kimura, Moe-Sandar Kyaw, Yuka Kasuga, Miki Nishijo, Takashi Okiji
Summary: In single-curved canals, TN yielded significantly higher torque values compared to RE, whereas in double-curved canals it was higher than PG. In single-curved canals, EDM exhibited significantly higher screw-in force compared to TN and RE, while in double-curved canals there was no significant difference.
JOURNAL OF DENTAL SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Soram Oh, Ju-Hyo Park, Hyun-Jung Kim, Hye-Jeong Kim, Eurok Shim, Jee-Yeon Woo, Hiran Perinpanayagam, Kyung-Kyu Choi, Seok Woo Chang
Summary: This study evaluated the effects of flexural stress on the torsional fracture resistance of NiTi glide path files. The flexural mode had a positive effect on the distortion angle of the files, and some files showed an increase in maximum torque with flexural stress.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Physical
Emmanuel J. N. L. Silva, Jorge N. R. Martins, Natasha C. Ajuz, Henrique S. Antunes, Victor T. L. Vieira, Francisco M. Braz Fernandes, Felipe G. Belladonna, Marco A. Versiani
Summary: This study compared three endodontic rotary systems in terms of design, metallurgy, and mechanical performance, and evaluated their shaping ability in simulated root canals. The results revealed similarities and differences in the design and material properties of the instruments, but their shaping ability was similar and without clinically significant errors.
Article
Biotechnology & Applied Microbiology
Alessio Zanza, Paola Russo, Rodolfo Reda, Paola Di Matteo, Orlando Donfrancesco, Pietro Ausiello, Luca Testarelli
Summary: An in-depth evaluation of the mechanical and metallurgical properties of NiTi instruments was conducted, with VB showing the best performance in cyclic fatigue resistance, EES performing the worst in torsional resistance, and DSC analysis revealing VB having the highest austenite transformation temperatures.
BIOENGINEERING-BASEL
(2022)
Article
Archaeology
Giacomo Vinci, Alessandro Fontana, Giorgia Musina, Lucia Mancini, Carmine Lubritto, Lucia Liccioli, Federico Bernardini
Summary: Depositional and erosional processes, subsidence and sea-level changes have significantly impacted the coastal landscape of northern Adriatic lagoons. The retrieval and analysis of six metal swords from Marano Lagoon, combined with the study of the coastal paleo-environment, revealed the historical importance of the area and the significant morphological changes that have occurred there. The data also indicate that Marano Lagoon served as a major hub in the northern Adriatic during the Late Middle Ages and Early Modern times, connecting inland Europe with the Mediterranean Sea. Furthermore, the research highlights the onset of coastal erosion and its possible causes.
Article
Engineering, Mechanical
Chiara Colombo, Andrea Tridello, Ana Paula Pagnoncelli, Carlo Alberto Biffi, Jacopo Fiocchi, Ausonio Tuissi, Laura Maria Vergani, Davide Salvatore Paolino
Summary: Three techniques for assessing the fatigue response of AMed parts were compared and proved to be effective, with infrared thermography and ultrasonic fatigue tests identifying the most critical defects.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Electrochemistry
Benedetto Bozzini, Marco Boniardi, Tommaso Caielli, Andrea Casaroli, Elisa Emanuele, Lucia Mancini, Nicola Sodini, Jacopo Strada
Summary: Secondary Zn-based batteries are a promising alternative to Li batteries for stationary storage, but their commercialization is hindered by issues such as anode shape-change and passivation. This study investigates the use of mildly acidic electrolytes to limit the unstable growth of Zn, with a focus on the impact of specific quaternary ammonium salts as electrolyte additives. The results show that TBAB is the most effective additive for low-current density operation, while additive-free electrolyte performs better at high current densities, consistent with previous findings for alkaline electrolytes.
Article
Engineering, Mechanical
Carlo Boursier Niutta, Andrea Tridello, Davide S. S. Paolino
Summary: In this paper, the fatigue design of AM components is addressed through Topology Optimization. Two defect-driven methodologies, which model the fatigue response in the finite life range and account for the experimental scatter, are compared. The optimal topologies of a cantilever beam and of an engine rod are determined and compared, showing that the defect-distribution method is the most conservative and the stress-gradient method can also be reliably applied in the case of uniform stress distribution, as in the engine rod.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2023)
Article
Engineering, Mechanical
A. Tridello, D. S. Paolino
Summary: This paper analytically derives the statistical distribution of total strain and fatigue life in the LCF-HCF life range, based on the Coffin-Manson and Morrow model. Parameter estimation using the maximum likelihood principle allows consideration of both failures and runout specimens. Additionally, a straightforward procedure for design curve estimation based on the likelihood ratio confidence lower bound is developed. The proposed model is validated with literature datasets on steel and aluminum alloys, demonstrating its effectiveness and reliability compared to existing models.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2023)
Article
Engineering, Mechanical
Andrea Tridello, Carlo Boursier Niutta, Filippo Berto, Davide S. Paolino
Summary: This paper investigates the influence of a blunt notch on the very high cycle fatigue (VHCF) response of SLM Ti6Al4V specimens. Ultrasonic fully reversed tension-compression tests were conducted up to 10^9 cycles on unnotched specimens and specimens with a blunt notch. Unnotched specimens exhibited slightly larger fatigue response, but with limited differences. Fatigue failures in both types of specimens originated from defects, which were bigger in unnotched specimens due to the different risk volume and size effect. The interactions between notch, stress gradient, and defect size distribution need to be taken into account for proper assessment of the influence of the notch on VHCF response.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2023)
Article
Engineering, Mechanical
A. Ciampaglia, A. Tridello, D. S. Paolino, F. Berto
Summary: In this paper, machine learning algorithms are utilized to predict the fatigue response of Additive Manufacturing (AM) components. It is found that manufacturing defects and microstructures, which are influenced by process parameters and heat treatments, play significant roles in determining the fatigue response.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Chemistry, Physical
Carlo Boursier Niutta, Raffaele Ciardiello, Andrea Tridello, Davide S. Paolino
Summary: In recent years, there has been a significant increase in the interest in sustainability in many industrial sectors. This can be achieved through lightweight design and eco-friendly manufacturing processes. One potential solution to the concerns over the use of non-recyclable thermoset composite materials is to replace the thermoset matrix with a recyclable or renewable matrix, such as a bio-based resin. Experimental tests have shown that composites made with bio-based resin have similar mechanical properties to those made with epoxy resins, making them a reliable substitute that reduces the carbon footprint.
Article
Materials Science, Multidisciplinary
Andrea Tridello, Carlo Boursier Niutta, Filippo Berto, Davide Salvatore Paolino
Summary: This study investigates the influence of size-effects on the very high cycle fatigue (VHCF) response of materials through ultrasonic fatigue tests on an aluminum alloy and four steels used in automotive applications. The experimental results are analyzed with an innovative statistical model based on the weakest-link principle and stress gradient within the specimens, revealing that size-effects significantly impact the VHCF response of the investigated materials. This further emphasizes the importance of properly verifying and accounting for size-effects in designing structural components against VHCF failure.
MATERIALS PERFORMANCE AND CHARACTERIZATION
(2023)
Article
Engineering, Mechanical
C. Boursier Niutta, D. S. Paolino, A. Tridello
Summary: This study proposes an experimental-numerical methodology for identifying the lower bound design curve of lattice structures under quasi-static compressive and impact tests. It is validated on an octet truss lattice structure made of an additively manufactured AlSi10Mg alloy. The defect size distribution is assessed through micro computed tomography, and the mechanical tests are simulated using a Finite Element Model (FEM) with a local reduction in truss diameter. The FEM accurately predicts the mechanical behavior, and the lower bound design curve is determined through statistical considerations for safe component design.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Engineering, Mechanical
Alessio Centola, Alberto Ciampaglia, Andrea Tridello, Davide Salvatore Paolino
Summary: The aim of this paper is to predict the fatigue life of SLMed Ti6Al4V components using machine learning techniques. The methods have been trained and validated using experimental data to assess their reliability. The study also investigates the impact of SLM process parameters on fatigue life.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2023)
Article
Geochemistry & Geophysics
F. Colle, M. Masotta, S. Costa, S. Mollo, P. Landi, A. Pontesilli, S. Peres, L. Mancini
Summary: This study investigates the textural and compositional evolution of clinopyroxene crystals using undercooling experiments. The results show that plagioclase is the dominant mineral phase at low undercooling, while clinopyroxene and spinel co-saturate the melt at higher undercooling. The morphological and geochemical changes in clinopyroxene are controlled by melt supersaturation and relaxation phenomena.
Article
Chemistry, Multidisciplinary
Mario Alovisi, Francesco Erovigni, Lorenzo Bianchi, Beatrice Longhi, Nicola Scotti, Damiano Pasqualini, Elio Berutti
Summary: This study performed a frenulectomy on a patient with pull syndrome and used n-hexyl-cyanoacrylate tissue adhesive for wound closure. The patient recovered within 15 days with minimal postoperative discomfort. The study suggests that this adhesive could be an alternative to traditional sutures, especially for surgical procedures involving wide flaps and unable to achieve first-intention healing.
APPLIED SCIENCES-BASEL
(2023)
Review
Medicine, General & Internal
Elina Mekhdieva, Massimo Del Fabbro, Mario Alovisi, Nicola Scotti, Allegra Comba, Elio Berutti, Damiano Pasqualini
Summary: The study suggests that the Dynamic Navigation System (DNS) is more accurate and efficient compared to the traditional free-hand approach in non-surgical and microsurgical endodontics. The DNS resulted in shorter operation time, less angular and linear deviation. The DNS showed significant advantages in substance loss for microsurgery. The use of DNS reduces the risk of iatrogenic failure for both expert and novice operators.
JOURNAL OF CLINICAL MEDICINE
(2023)
Article
Construction & Building Technology
Simona Raneri, Lucia Mancini, Gabriele Lanzafame, Alexander Peter Kao, Konstantinos Giannoukos, Ravi Chandra Malladi, M. Shiva Kumar, Vincenzo Palleschi, Thirumalini Selvaraj
Summary: The characterisation of lime mortars is crucial for the conservation and repair of ancient buildings. The pore structure, influenced by manufacturing processes, recipes, and technical expedients, plays a significant role in the strength and durability of mortars. Fermenting organic matter in water and adding it to lime mixture has shown promising potential for improving workability and mechanical performance. The use of high-resolution synchrotron radiation computed microtomography (SR-mu-CT) proves to be an effective tool for studying the contribution of organically fermented water in lime mortars and understanding the impact on pore structure and mechanical properties.
JOURNAL OF BUILDING ENGINEERING
(2023)