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Journal articles on the topic 'Thermoplastic Filling'

Author: Grafiati

Published: 8 September 2021

Last updated: 29 July 2025

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1

Kauhanna Vianna de Oliveira, Flávia Sens Fagundes Tomazinho, Beatriz Serrato Coelho, et al. "Thermoplastic endodontic obturation – TC system: case report." RSBO 13, no. 1 (2016): 46–09. http://dx.doi.org/10.21726/rsbo.v13i1.681.

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The TC system, developed in 2002, allows the endodontic filling by means of a non-conventional technique that uses gutta-percha at alpha phase, thermoplasticized in its own oven, placed into canal through a McSpadden compactor, without using a main cone. Objective: The aim of this case report was to show the TC system used for root canal filling. Case report: Three teeth of a patient was indicated for endodontic treatment, so TC system was used for the root filling. Conclusion: This technique showed to be effective for the root canal filling.

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2

Aronsson, Gunnar. "On p-harmonic functions, convex duality and an asymptotic formula for injection mould filling." European Journal of Applied Mathematics 7, no. 5 (1996): 417–37. http://dx.doi.org/10.1017/s0956792500002473.

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This work treats the injection of certain thermoplastics into a planar mould cavity. The problem is to determine the filling pattern. It is assumed that the thermoplastic can be modelled as a non-Newtonian fluid of power-law type whose power-law exponent is relatively small (the pseudo-plastic case). The dependence of the viscosity on thermal variations is neglected. The mathematical description leads to a moving boundary problem, for which an asymptotic solution is found. According to this solution, the expansion of the polymer melt follows the level sets of an interior distance function, whi

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3

Tran, Ngoc Tu, Andreas Seefried, and Michael Gehde. "Investigation of the Influence of Fiber Content, Processing Conditions and Surface Roughness on the Polymer Filling Behavior in Thermoset Injection Molding." Polymers 15, no. 5 (2023): 1244. http://dx.doi.org/10.3390/polym15051244.

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A completely opposite injection molding filling behavior of thermosets and thermoplastics by an effective and useful method developed by the authors was found. Specifically, for the thermoset injection molding, there is a strong slip between the thermoset melt and wall surface, which is not found for the injection molding of thermoplastic materials. In addition, the variables, such as the filler content, the mold temperature, the injection speed, and the surface roughness that could lead to or influence the slip phenomenon of thermoset injection molding compounds, were also investigated. Furth

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4

Contaldi, Vincenzo, Maria Giovanna Pastore Carbone, Ernesto Di Maio, Anastasios C. Manikas, and Paolo Antonio Netti. "Easy-to-fill asymmetric polymeric micro-reservoirs." RSC Advances 6, no. 68 (2016): 64140–46. http://dx.doi.org/10.1039/c6ra04812a.

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Thermoplastic, asymmetrical, micrometric reservoirs filled with a desired host molecule are achieved by gas foaming and subsequent filling. This method paves the way to a breakthrough in the vibrant micro- and nanoparticle area.

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5

Sposito, A., V. Hoang, and D. L. DeVoe. "Rapid real-time PCR and high resolution melt analysis in a self-filling thermoplastic chip." Lab on a Chip 16, no. 18 (2016): 3524–31. http://dx.doi.org/10.1039/c6lc00711b.

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6

Fomina, N. N., D. K. Timokhin, A. V. Strachov, and V. G. Fomin. "Methodological aspects of strength testing of building products based on thermoplastic waste." Stroitel nye Materialy, no. 1-2 (April 9, 2025): 95–101. https://doi.org/10.31659/0585-430x-2025-832-1-2-95-101.

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The urgency of the problem of recycling polymer waste is increasing every year. It is promising to use thermoplastic waste as binders in polymer-mineral compositions for the production of small-piece construction products such as paving slabs, curbs, parking limiters, elements of landscape design, etc. Technical requirements for the compositions of polymer-mineral compositions, the properties of their products, test methods are not regulated. One of the most informative characteristics is static uniaxial compression tests. It is necessary to accumulate statistics on strength tests of composite

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7

Yamada, Keiji. "20 Cases of Apical Lesion Disappearance by Thermoplastic Root Canal Filling." JOURNAL OF THE ACADEMY OF CLINICAL DENTISTRY 29, no. 4 (2009): 266–75. http://dx.doi.org/10.14399/jacd.29.266.

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8

LeBlanc, Dominic, Benoit Landry, Arthur Levy, et al. "Study of Processing Conditions on the Forming of Ribbed Features Using Randomly Oriented Strands Thermoplastic Composites." Journal of the American Helicopter Society 60, no. 1 (2015): 1–9. http://dx.doi.org/10.4050/jahs.60.011005.

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Compression molding of randomly oriented strands (ROS) composites offers the possibility to manufacture complex parts with a fast processing cycle. In this paper, effects of pressure, strand size, temperature, and material placement in the mold cavity on the quality of a T-shape part were studied experimentally with carbon/polyether ether ketone ROS composites. Minimum filling pressure was obtained for the consolidation of a 25-mm deep cavity. Parts processed at filling pressure showed a void content no greater than 1.2%. Increasing pressure to 70 bar resulted in decreased void content as low

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9

Tipboonsri, Ponlapath, Supaaek Pramoonmak, Putinun Uawongsuwan, and Anin Memon. "Optimization of Thermoplastic Pultrusion Parameters of Jute and Glass Fiber-Reinforced Polypropylene Composite." Polymers 16, no. 1 (2023): 83. http://dx.doi.org/10.3390/polym16010083.

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Thermoplastic pultrusion is a suitable process for fabricating continuous unidirectional thermoplastics with a uniform cross-section, high mechanical properties due to continuous fiber reinforcement, low cost, and suitability for mass production. In this paper, jute and glass fibers were reinforced with a polypropylene matrix and fabricated using the thermoplastic pultrusion process. The volumetric fraction of the composite was designed by controlling the filling ratio of the reinforcing fiber and matrix. The effects of molding parameters were investigated, such as pulling speed and molding te

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10

G.Rajendra, Prasad* Dr. S.Chakradhar Goud. "INTEGRAL ANALYSIS OF INJECTION MOULD WITH HOT RUNNERS FOR GATE." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 6, no. 5 (2017): 272–77. https://doi.org/10.5281/zenodo.574455.

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This paper presents an integrated approach to evaluate gating system configurations to optimize the filling conditions of thermoplastic injection moulded parts. Through data integration between the finite element (FE) analysis and the Design of Experiment approach, the filling of parts with complex geometries was studied to optimize injection process parameters and improve the product quality. The numerical simulation of an injection moulding process allows the evaluation of the component manufacturability at the early stage of the development cycle, without fabricating prototypes and minimizi

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11

Leonardo, Mario Roberto, Devanir de Araújo Cervi, Juliane Maria Guerreiro Tanomaru, and Léa Assed Bezerra da Silva. "Effect of different rotary instrumentation techniques and thermoplastic filling on apical sealing." Journal of Applied Oral Science 12, no. 1 (2004): 89–92. http://dx.doi.org/10.1590/s1678-77572004000100016.

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The aim of this study was to evaluate apical sealing after root canal treatment using two different rotary instrumentation techniques and two thermoplastic root canal filling techniques. The study was performed in 115 human extracted mandibular premolars. After coronary access the apical foramen was opened with a # 15 K file 1 mm beyond the apex. Cleaning and shaping was subsequently carried out at the working length, 1 mm from the apex, with ProFile .04/.06 system (Dentsply/Maillefer), Quantec (Analytic Endodontics/Kerr) or by the step-back technique with 1% sodium hypochlorite solution as ir

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12

Bakharev, Alexander, David Astbury, Shishir Ray, Franco S. Costa, and Russell Speight. "Effect of normal stresses on the results of thermoplastic mold filling simulation." MATEC Web of Conferences 80 (2016): 16004. http://dx.doi.org/10.1051/matecconf/20168016004.

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13

Moon, H. J., J. H. Lee, J. H. Ahn, H. J. Song, and Y. J. Park. "Temperature-dependent rheological property changes of thermoplastic gutta-percha root filling materials." International Endodontic Journal 48, no. 6 (2014): 556–63. http://dx.doi.org/10.1111/iej.12349.

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14

Shenoy, Vanitha U., and M. V. Sumanthini. "Resilon-Epiphany Obturation System." Journal of Contemporary Dentistry 1, no. 1 (2011): 30–32. http://dx.doi.org/10.5005/jcd-1-1-30.

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Abstract For over hundred years Gutta Percha (GP) has been the most common material used for the obturation of the root canal. GP was the standard with which newer materials were tested. GP fulfills all the characteristics of an ideal root canal filling material, but has a disadvantage of not being able to seal the root canal on its own and requires a sealer for providing an effective seal. In an attempt to overcome this draw back a new root canal filling material was introduced, called, Resilon which is a thermoplastic synthetic polymer-based root canal filling material and Epiphany being the

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15

Sung, Min Chang, Geun Sung Lee, Seung Yong Lee, et al. "Manufacture of Carbon Nanotube-Grafted Carbon Fiber Reinforced Thermoplastic Composites." Key Engineering Materials 651-653 (July 2015): 405–8. http://dx.doi.org/10.4028/www.scientific.net/kem.651-653.405.

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Carbon fiber reinforced composites (CFRCs) have been used in various high-end industries due to their outstanding specific mechanical properties. Recently, carbon nanotube (CNT)-grafted carbon fibers (CFs) made via direct growth has emerged as an advanced and hierarchical reinforcement that can improve the reinforcing effect of CFs in CFRCs. On the other hand, CF reinforced thermoplastic composites (CFRTPs) have attracted much attention because of their quick and mass production capability, e.g., which is important for automotive part manufacturing. Here, we report on the manufacture of CFRTPs

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16

Tzetzis, Dimitrios, Ioannis Sofianidis, and Panagiotis Kyratsis. "Computer Aided Injection Multi Cavity Molding Process Analysis of Thermoplastic Polymers." Applied Mechanics and Materials 808 (November 2015): 107–12. http://dx.doi.org/10.4028/www.scientific.net/amm.808.107.

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Multi cavity injection molds contain two or more cavities for the fabrication of multiple parts in a single production cycle sharing a mutual batch of thermoplastic resins. The current study simulates the process of performing runner balancing for the two uneven cavities of an electrical box, while it studies the effects of certain injection molding process parameters. The runner layout and the injection locations have been studied and detailed considering the product’s geometries. The runner balancing procedure and the thickness distribution have been also investigated by taking into account

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17

Gliścińska, Eulalia, Marina Michalak, and Izabella Krucińska. "Sound absorption property of nonwoven based composites." Autex Research Journal 13, no. 4 (2013): 150–55. http://dx.doi.org/10.2478/v10304-012-0036-2.

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Abstract Sound absorbing materials used to provide optimal conditions in rooms can be applied in the form of textiles with a special structure such as nonwovens or fibre-containing composites. Nonwovens can be successfully used to make thermoplastic composites by thermal pressing. This paper presents the comparison of the sound absorbing properties of needled nonwovens and composites made from them. Composites with various densities can be made of nonwovens with various percentage contents of filling and matrix fibres. The sound absorption by composites with similar thickness, about several mi

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18

Liu, Lin, X. L. Ni, Hai Qing Yin, and Xuan Hui Qu. "Study on Binder System for Micro Powder Injection Molding of ZrO₂ Ceramic." Materials Science Forum 706-709 (January 2012): 1948–54. http://dx.doi.org/10.4028/www.scientific.net/msf.706-709.1948.

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Micro powder injection molding has been accepted as a potential forming technology for large-scale production of miniature components in industries. However, mold filling capability is often poor due to the blind hole structure of the die cavity, which restricts the widespread application of this technique. In this paper, ZrO2 micro gears with addendum circle ranging from 900μm to 200μm were studied. Instead of using traditional PW-HDPE-SA binder as in powder injection molding, thermoplastic binder system is optimized here for better replication of micro gear. It is found that the dimensional

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19

Schricker, Klaus, and Jean Pierre Bergmann. "Temperature- and Time-Dependent Penetration of Surface Structures in Thermal Joining of Plastics to Metals." Key Engineering Materials 809 (June 2019): 378–85. http://dx.doi.org/10.4028/www.scientific.net/kem.809.378.

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The temperature- and time-dependent penetration of surface structures is examined in thermal joining between polypropylene and aluminum. Experimental and numerical investigations were carried out for spot joints in order to describe the main effects on structure penetration. Further investigations were performed in a half-section setup to gain information directly from the joining zone. The thermal expansion of the thermoplastic material as well as the temperature distribution in the melting layer were identified as key parameters for structure filling on the metal surface.

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20

Nilsson, Elisabeth, Eric Bonte, François Bayet, and Jean-Jacques Lasfargues. "Management of Internal Root Resorption on Permanent Teeth." International Journal of Dentistry 2013 (2013): 1–7. http://dx.doi.org/10.1155/2013/929486.

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Internal root resorption (IRR) is a particular category of pulp disease characterized by the loss of dentine as a result of the action of clastic cells stimulated by pulpal inflammation. This review article explains the etiology, the prevalence of IRR, and, in addition to the clinical data, the contribution of the three-dimensional imaging (CBCT) to the diagnosis, the clinical decision, and the therapeutic management of IRR. The authors discussed the various therapeutic options including the orthograde or retrograde fillings of the root canal resorption area. Root canal treatment remains the t

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21

Lu, Chao-Tsang, and Jia-Horng Lin. "The physical property evaluation of degradation thermoplastic polylactic acid net-reinforced dental filling material." Journal of Thermoplastic Composite Materials 28, no. 8 (2013): 1189–201. http://dx.doi.org/10.1177/0892705713503674.

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22

Beraldo, Daniele Zafalon, Key Fabiano Souza Pereira, Franciely Mariani Silva Yoshinari, João Onofre Pereira Pinto, Tiago Henrique de Abreu Mateus, and Edilson José Zafalon. "Temperature Changes on External Root Surfaces with the Use of Several Thermoplastic Filling Techniques." Journal of Endodontics 42, no. 7 (2016): 1131–34. http://dx.doi.org/10.1016/j.joen.2016.04.011.

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23

Özdemir, A., O. Uluer, and A. Güldaş. "Flow front advancement of molten thermoplastic materials during filling stage of a mold cavity." Polymer Testing 23, no. 8 (2004): 957–66. http://dx.doi.org/10.1016/j.polymertesting.2004.04.011.

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24

Simacek, Pavel, Suresh G. Advani, Mark Gruber, and Brian Jensen. "A non-local void filling model to describe its dynamics during processing thermoplastic composites." Composites Part A: Applied Science and Manufacturing 46 (March 2013): 154–65. http://dx.doi.org/10.1016/j.compositesa.2012.10.015.

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25

Padmanabhan, S., J. Y. Han, I. Nanayankkara, et al. "Enhanced sample filling and discretization in thermoplastic 2D microwell arrays using asymmetric contact angles." Biomicrofluidics 14, no. 1 (2020): 014113. http://dx.doi.org/10.1063/1.5126938.

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26

Ojha, Satyajeet, Alei Dang, Chin Ming Hui, Clare Mahoney, Krzysztof Matyjaszewski, and Michael R. Bockstaller. "Strategies for the Synthesis of Thermoplastic Polymer Nanocomposite Materials with High Inorganic Filling Fraction." Langmuir 29, no. 28 (2013): 8989–96. http://dx.doi.org/10.1021/la401522v.

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27

Pjanic, Nicolas. "Research of Wood-Polymer Compositions of DMTA Methods." International Journal of Science and Society 2, no. 4 (2020): 19–24. http://dx.doi.org/10.54783/ijsoc.v2i4.190.

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The article presents the results of polymer-wood composites, as well as the excretion of tritium woods and leaves. The base of the composite was made of thermoplastic polypropylene. Three composites prepared by the volume of filling content (25, 50 and 70%) and the various fractions of the used slags were prepared for research. The test is prepared with the use of spray technology. One of the methods of thermal DMTA analysis is used for research. Accompanied studies of dynamic mechanical properties have been chosen to determine the effect of filling and the size of the traces on the properties

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28

Pjanic, Nicolas. "Research of Wood-Polymer Compositions of DMTA Methods." International Journal of Science and Society 2, no. 4 (2020): 19–24. http://dx.doi.org/10.54783/ijsoc.v2i4.190.

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The article presents the results of polymer-wood composites, as well as the excretion of tritium woods and leaves. The base of the composite was made of thermoplastic polypropylene. Three composites prepared by the volume of filling content (25, 50 and 70%) and the various fractions of the used slags were prepared for research. The test is prepared with the use of spray technology. One of the methods of thermal DMTA analysis is used for research. Accompanied studies of dynamic mechanical properties have been chosen to determine the effect of filling and the size of the traces on the properties

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29

Amida, Aya, Dudi Aripin, Ayu Trisna Hayati, et al. "<strong>Differences of Micro-CT evaluation of the obturation sealing capability between thermoplastic carrier-based condensing techniques and lateral heat condensation techniques</strong>." Padjadjaran Journal of Dentistry 34, no. 2 (2022): 174. http://dx.doi.org/10.24198/pjd.vol34no2.41384.

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ABSTRACT Introduction: Root canal filling is an important part of root canal treatment that aimed to seal the root canal system, to prevent bacterial penetration and their toxins into periradicular tissues and to provide favourable environment for periapical healing. Thermoplasticized technique were developed to produce filling with homogenous mass, to achieve optimal sealing ability and to increase the quality of root canal filling. The aim of this study is to analyzed differences of Micro-Computed Tomography (Micro-CT) evaluation of the obturation sealing capability between thermoplastic car

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30

Fasah, Elias. "Evolution of Endodontics: Innovations in Instrumentation, Irrigation and Filling." SCT Proceedings in Interdisciplinary Insights and Innovations 3 (January 1, 2025): 417. https://doi.org/10.56294/piii2025417.

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Endodontic treatment underwent a remarkable evolution from its beginnings, moving from rudimentary and painful techniques in the 18th and 19th centuries to advanced and specialised procedures in the 20th and 21st centuries. Pierre Fauchard described the first attempts at pulp extraction in the 18th century, while the 19th century saw the development of more efficient hand files, such as those designed by Charles Maïsse, which facilitated the cleaning of root canals. In the 20th century, technological advances transformed endodontics with the discovery of the importance of disinfection. Antibac

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31

Torun, Ahmet Refah, Ali Sinan Dike, Ege Can Yıldız, İsmail Sağlam, and Naghdali Choupani. "Fracture characterization and modeling of Gyroid filled 3D printed PLA structures." Materials Testing 63, no. 5 (2021): 397–401. http://dx.doi.org/10.1515/mt-2020-0068.

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Abstract Polylactic acid (PLA) is a commonly used biodegradable material in medical and increasingly in industrial applications. These materials are often exposed to various flaws and faults due to working and production conditions, and increasing the demand for PLA for various applications requires a full understanding of its fracture behavior. In addition to ABS, PLA is a widely used polymeric material in 3D printing. The gyroid type of filling is advantageous for overcoming the relatively higher brittleness of PLA in comparison with conventional thermoplastic polymers. In this study, the ef

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32

Liu, Qingqing, Yanting Gu, Wei Xu, Tao Lu, Wenjun Li, and Haibin Fan. "Compressive Properties of Polyurethane Fiber Mattress Filling Material." Applied Sciences 12, no. 12 (2022): 6139. http://dx.doi.org/10.3390/app12126139.

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There is an inevitable trend toward exploring new, environmentally friendly fibers that can be used as raw material for mattresses with moderate hardness and air-permeable characteristics. Ethylene-propylene side by side (ES), high-shrinkage fibers, and thermoplastic polyester elastomer (TPEE) chips were introduced into polyethylene glycol terephthalate (PET)/polybutylene terephthalate (PBT) chip by melt blending to modify PET/PBT fiber. The modified PET/PBT (hereinafter referred to as PLON) is more suitable for mattress filling material than PET/PBT. To explore the compressive properties of P

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33

Hamanaka, Senji, Chisato Nonomura, and Atsushi Yokoyama. "The layer-structure transition of glass-fiber-reinforced composite materials." Journal of Polymer Engineering 40, no. 1 (2019): 30–37. http://dx.doi.org/10.1515/polyeng-2019-0208.

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Abstract This study aims to investigate whether the layer-structure transition governed by fiber orientation is caused by the change in the elongational strain field or by the change in the shear strain field during the filling process in injection molding using short-fiber-reinforced thermoplastic resin. To this end, a polyamide 6 containing 30 wt% of short-fiber glass was compounded, and a simple plate was injection-molded. The fiber orientation of the plate was observed via X-ray computed tomography, and the fiber orientation distribution was quantified as fiber orientation tensors. The tra

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34

Dantas, Gabriel Da Motta, and Danielle Ferreira dos Santos. "Effect of the Degree of Filling on Mechanical Properties of Polymeric Specimens from Polyethylene Terephthalate Glycol and Polylactic Acid Produced by 3D Printing." Engineering Innovations 7 (October 13, 2023): 7–18. http://dx.doi.org/10.4028/p-0vk0vf.

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Based 3D printing has become very popular in recent years due to the emergence of projects for low-cost machines, making the technology very accessible. In view of this, some polymers, in general, in thermoplastic filaments, are placed on the market for application in this type of printing technique, making it increasingly necessary to develop research for the characterization of materials to provide information on physical, thermal and mechanical properties. For the development of this work, the polymer poly(ethylene glycol terephthalate) (PETG) was used for a comparative study in relation to

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35

Esbol, Zh, Z. K. Sattinova, D. E. Turalina, and E. K. Mussenova. "STUDY OF THE EFFECT OF HEAT TRANSFER DURING MOLDING OF TERMOPLASTIC BERYLLIUM OXIDE CERAMICS." Eurasian Physical Technical Journal 22, no. 1 (51) (2025): 103–14. https://doi.org/10.31489/2025n1/103-114.

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Beryllium oxide (BeO) ceramics formed with the use of ultrasound exhibit more intense sintering, lower shrinkage, and a reduced sintering temperature compared to ceramics produced without ultrasound. The effectiveness of ultrafast sintering is dependent on the cohesion of ceramic agglomeration and the proper arrangement of particles. Rheological properties thermoplastic slurry changed as a result of ultrasound activation. These changes are related to dispersion phase processes and mass transfer. Ultrasonic activation also slightly enhances the properties of the castings. The increase in the de

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36

Boğa, Cem. "Investigation of mechanical and fracture behavior of pure and carbon fiber reinforced ABS samples processed by fused filament fabrication process." Rapid Prototyping Journal 27, no. 6 (2021): 1220–29. http://dx.doi.org/10.1108/rpj-11-2020-0296.

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Purpose Acrylonitrile butadiene styrene (ABS), as a light and high strength thermoplastic polymer, has found extensive applications in different industries. Fused filament fabrication, known as three-dimensional (3D) printing technique is considered a rapid prototyping technique that is frequently applied for production of samples of ABS material. Therefore, the purpose of this study is to investigate the mechanical and fracture behavior of such materials and the techniques to improve such properties. Design/methodology/approach Experimental and numerical analyses have been conducted to invest

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37

Panin, Sergey V., Boris A. Lyukshin, Svetlana A. Bochkareva, et al. "Material Design Methodology for Optimized Wear-Resistant Thermoplastic–Matrix Composites Based on Polyetheretherketone and Polyphenylene Sulfide." Materials 13, no. 3 (2020): 524. http://dx.doi.org/10.3390/ma13030524.

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The main goal of this paper is to design and justify optimized compositions of thermoplastic–matrix wear-resistant composites based on polyetheretherketone (PEEK) and polyphenylene sulfide (PPS). Their mechanical and tribological properties have been specified in the form of bilateral and unilateral limits. For this purpose, a material design methodology has been developed. It has enabled to determine the optimal degrees of filling of the PEEK- and PPS-based composites with carbon microfibers and polytetrafluoroethylene particles. According to the results of tribological tests, the PEEK-based

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38

Kolotilin, D. V., A. V. Dedov, and R. I. Kunnap. "Procedure for evaluation of tightness of polymer tanks for transportation of fuel by air." Plasticheskie massy, no. 1-2 (March 19, 2021): 46–48. http://dx.doi.org/10.35164/0554-2901-2021-1-2-46-48.

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The analysis of methods for assessing the diffusion permeability of polymer materials is carried out. The limitations of the methods for determining the tightness time and the rate of fuel bleeding from elastic tanks based on thermoplastic polyurethanes are shown. To solve the set tasks, an approach is proposed related to establishing dependencies of the kinetics of diesel fuel bleeding in the coordinate system of the conditional time, which was calculated as the square root of the process time. The tightness time and rate of fuel bleeding depends on the degree of filling of the tank during te

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SANT’ANNA JUNIOR, Arnaldo, Juliane Maria GUERREIRO-TANOMARU, Roberta Bosso MARTELO, Guilherme Ferreira da SILVA, and Mário TANOMARU FILHO. "Filling of simulated lateral canals with gutta-percha or thermoplastic polymer by warm vertical compaction." Brazilian Oral Research 29, no. 1 (2015): 1–6. http://dx.doi.org/10.1590/1807-3107bor-2015.vol29.0056.

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40

Patrícia Yanne de Oliveira, Renato Girelli Coelho, and Mariane Floriano Lopes Lacerda. "Type IIIb dens in dente endodontic retreatment: a case report." RSBO 17, no. 2 (2021): 196–201. http://dx.doi.org/10.21726/rsbo.v17i2.45.

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Dens in dente is a developmental anomaly characterized by dental tissues invagination that varies from a slight increase of the cingulum´s fossa to a deep groove that can extend up to the dental apex. Objectives The aim of this study was to report a dens in dente endodontic retreatment case with the presence of fistula and periapical lesion. Case report: Non-surgical retreatment was performed from the removal of the filling endodontic material, use of Calcium Hydroxide as intracanal medication changed every two months for a one year and a half period, and later, apical closure with MTA and end

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41

Trinh, Van-Long, Xuan-Chung Nguyen, Tien-Sy Nguyen, Viet-Hoi Tran, Huy-Kien Nguyen, and Van-Nam Hoang. "Predicting the Warpage of Plastic Products during the Injection Molding Process using the BBM Method." Engineering, Technology & Applied Science Research 15, no. 3 (2025): 22895–900. https://doi.org/10.48084/etasr.10838.

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During the injection molding process, the warpage prediction plays a significant role in order to improve the quality of a product. This procedure depends on a variety of parameters, such as pressure, melting temperature, packing, and filling time. Polyethylene Terephthalate Glycol (PETG) is a thermoplastic material that exhibits a great bending attribute, heat resistance, and durability. This paper examines a method for predicting the warpage defect using the Box-Behnken Method (BBM). The mathematical model is formed to predict the warpage with high reliability, resulting in R-Sq of 97.81%, R

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Прут, Eduard Prut, Черкашина, Natalya Cherkashina, Ястребинская, and Anna Yastrebinskaya. "DEVELOPMENT OF POLYMERIC COMPOSITE MATERIALS BASED ON THERMOPLASTIC ELASTOMERS." Bulletin of Belgorod State Technological University named after. V. G. Shukhov 1, no. 12 (2016): 195–99. http://dx.doi.org/10.12737/22761.

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This paper presents data on the development of polymer composite materials based on thermoplastic elastomers. As starting materials for the synthesis of the matrix components were selected as follows: isotactic polypropylene and ternary ethylene-propylene-diene elastomer (EPDM). Diene component in EPDM are ethylidene norbornene composition in an amount of 4-5%. Dynamic vulcanization was carried out using the elastomer element sulfur. The filler polymer composite materials used silica gel with dimethyl polysiloxane. Synthesis was carried out by filling the sol-gel technology. The filler content

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Butean, Oana-Paula, Valentina Costin, Bogdan Rusu, Zsuzsanna Bardocz-Veres, Damla Erkal, and Kürşat Er. "Comparison of the gutta-percha amounts used by two root canal obturation techniques in simulated root canals shaped with four different NiTi file systems." Acta Stomatologica Marisiensis Journal 8, no. 1 (2025): 25–33. https://doi.org/10.62838/asmj.2025.1.04.

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Introduction: The three-dimensional and hermetic obturation of the root canal is considered a fundamental element for successful root canal treatment. Aim of the study: This study aimed to compare the effects of different NiTi file systems and canal obturation techniques on the amount of root canal filling. Material and Methods: A total of 80 standardized transparent acrylic blocks (TABs) with canals of 17 mm length, a constant taper of 2%, and a curvature of 30 degrees were used. The canals were shaped using 4 different NiTi file systems [ProTaper Next (PTN), ProTaper Ultimate (PTU), VDW Rota

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Rizov, V., T. Harmia, A. Reinhardt, and K. Friedrich. "Fracture Toughness of Discontinuous Long Glass Fiber Reinforced Polypropylene: An Approach Based on a Numerical Prediction of Fiber Orientation in Injection Molding." Polymers and Polymer Composites 13, no. 2 (2005): 121–30. http://dx.doi.org/10.1177/096739110501300201.

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The fracture toughness of discontinuous long glass fiber reinforced injection-molded polypropylene has been characterized by using the microstructural efficiency concept in combination with a numerical prediction of the fiber orientation during injection molding. The latter was performed by using the SIGMASOFT commercial software. In a three-dimensional numerical scheme, input data such as fiber volume fractions, shear viscosity and mean fiber aspect ratio have been used in order to perform the mold filling analysis. The resulted local fiber orientation parameters for injection molded square p

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Schulenberg, L., T. Seelig, F. Andrieux, and D.-Z. Sun. "An anisotropic elasto-plastic material model for injection-molded long fiber-reinforced thermoplastics accounting for local fiber orientation distributions." Journal of Composite Materials 51, no. 14 (2016): 2061–78. http://dx.doi.org/10.1177/0021998316668983.

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This paper presents an anisotropic elasto-plastic material model for injection-molded long fiber-reinforced thermoplastics. It considers local heterogeneities which are attributed to process-induced variations of fiber orientation distributions and fiber volume fractions. These inhomogeneities have an effect on the mechanical properties and need to be considered in structural computations. In the material model, this is realized through a two-step homogenization procedure. First, an anisotropic stiffness tensor is approximated using mean field homogenization. Second, the plastic behavior is de

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Andriyana, A., Luisa Silva, and Noelle Billon. "Viscoelastic Characterization of Short Fibres Reinforced Thermoplastic in Tension and Shearing." Applied Mechanics and Materials 24-25 (June 2010): 419–23. http://dx.doi.org/10.4028/www.scientific.net/amm.24-25.419.

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The present work can be regarded as a first step toward an integrated modelling of mould filling during injection moulding process of polymer matrix composites and the resulting material behaviour under service loading conditions. More precisely, the emphasis of the present research is laid on the development of a mechanical model which takes into account the processing-induced microstructure and is capable to predict the mechanical response of the material. In the Part I, a set of experiments which captures the mechanical behaviour of an injection moulded short fibre reinforced under differen

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Do, Thanh Trung, Tran Minh The Uyen, and Pham Son Minh. "The Feasibility of an Internal Gas-Assisted Heating Method for Improving the Melt Filling Ability of Polyamide 6 Thermoplastic Composites in a Thin Wall Injection Molding Process." Polymers 13, no. 7 (2021): 1004. http://dx.doi.org/10.3390/polym13071004.

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In thin wall injection molding, the filling of plastic material into the cavity will be restricted by the frozen layer due to the quick cooling of the hot melt when it contacts with the lower temperature surface of the cavity. This problem is heightened in composite material, which has a higher viscosity than pure plastic. In this paper, to reduce the frozen layer as well as improve the filling ability of polyamide 6 reinforced with 30 wt.% glass fiber (PA6/GF30%) in the thin wall injection molding process, a preheating step with the internal gas heating method was applied to heat the cavity s

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Chuayjuljit, Saowaroj, and Thitima Rupunt. "Thermoplastic Elastomer Nanocomposites of Polypropylene/Ethylene Octene Copolymer/Carbon Nanotubes." Advanced Materials Research 488-489 (March 2012): 691–95. http://dx.doi.org/10.4028/www.scientific.net/amr.488-489.691.

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The focus of this study is to investigate the influences of ethylene octene copolymer (EOC) and carbon nanotubes (CNTs) on the mechanical properties (tensile and flexural properties) and thermal stability of polypropylene (PP)-based thermoplastic elastomer nanocomposites. The PP/EOC blends were prepared at two different weight ratios, 80/20 and 70/30 (w/w) PP/EOC, and each blend was compounded with a very low loading of CNTs (0.5-2 parts by weight per hundred of the PP/EOC resin). Both PP/EOC blends exhibited a higher elongation at break but a lower tensile strength, Young’s modulus and flexur

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Dobrzańska, Joanna, Lech B. Dobrzański, Leszek A. Dobrzański, Klaudiusz Gołombek, and Anna D. Dobrzańska-Danikiewicz. "Is Gutta-Percha Still the “Gold Standard” among Filling Materials in Endodontic Treatment?" Processes 9, no. 8 (2021): 1467. http://dx.doi.org/10.3390/pr9081467.

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The paper is an extensive monographic review of the literature, and also uses the results of the authors’ own experimental research illustrating the noticed developmental tendencies of the filling material based on gutta-percha. The whole body of literature proves the correctness of the research thesis that this material is the best currently that can be used in endodontics. Caries is one of the most common global infectious diseases. Since the dawn of humankind, the consequence of the disease has been the loss of dentition over time through dental extractions. Both tooth caries and tooth loss

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Regi, Francesco, Patrick Guerrier, Yang Zhang, and Guido Tosello. "Experimental Characterization and Simulation of Thermoplastic Polymer Flow Hesitation in Thin-Wall Injection Molding Using Direct In-Mold Visualization Technique." Micromachines 11, no. 4 (2020): 428. http://dx.doi.org/10.3390/mi11040428.

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A special mold provided with a glass window was used in order to directly evaluate the flow progression during the filling phase of the injection molding process in a thin-wall cavity and to validate the simulation of the process with particular focus on the hesitation effect. The flow of the polymer was recorded at 500 frames per second using a high-speed camera (HSC). Two unfilled thermoplastic polymers, acrylonitrile butadiene styrene (ABS), and polypropylene (PP), were used to fill two different 50 mm × 18 mm staircase geometry cavities, which were specifically designed to evaluate the hes

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