Article
Chemistry, Physical
Konstantin Johannes Scholz, Aleksandra Bittner, Fabian Cieplik, Karl-Anton Hiller, Gottfried Schmalz, Wolfgang Buchalla, Marianne Federlin
Summary: Interfaces between dentin, enamel, and luting agents were characterized using low vacuum SEM, showing that different luting agents had varying effects on the micromorphology of adhesive interfaces under different curing modes.
Article
Engineering, Aerospace
Secil Ozkan Ata, Canan Akay, Emre Mumcu, Nazim Ata
Summary: The type of luting cement, mixing methods and environmental pressure changes significantly affect the bond strengths. Dentists can use auto-mixed self-adhesive resins in patients likely to be exposed to hypobaric pressure.
AIRCRAFT ENGINEERING AND AEROSPACE TECHNOLOGY
(2023)
Article
Dentistry, Oral Surgery & Medicine
Anuschka Josephine Roesner, Leonie Schmohl, Sebastian Hahnel, Florian Fuchs, Andreas Koenig, Angelika Rauch
Summary: The aim of this study was to investigate the resistance of different self-adhesive and adhesive resin luting cements against acidic media and their long-term exposure. The study found that the assessment of microhardness and surface analysis provided valid data to evaluate the acid resistance of the resin luting cements. Some cements showed minimal changes in microhardness and surface quality, while others exhibited significant reduction in microhardness and changes in surface quality.
Article
Dentistry, Oral Surgery & Medicine
Rua Babaier, Julfikar Haider, Nick Silikas, David C. Watts
Summary: This study investigated potential variations in polymerisation of light-and dual-cured resin cements photoactivated through four CAD/CAM restorative materials as a function of substrate thickness. The results showed that increasing substrate thickness reduced energy delivery to the luting cements and significantly affected the hardness of the cement discs. However, there was only a slight reduction in degree of conversion.
Article
Biotechnology & Applied Microbiology
Alejandro Elizalde-Hernandez, Louis Hardan, Rim Bourgi, Cristina Pereira Isolan, Andressa Goicochea Moreira, J. Eliezer Zamarripa-Calderon, Evandro Piva, Carlos Enrique Cuevas-Suarez, Walter Devoto, Ahmed Saad, Patrycja Proc, Monika Lukomska-Szymanska
Summary: This study evaluated the effect of different desensitizers on the immediate and long-term shear bond strength (SBS) of a self-adhesive resin cement (SARC) to dentin. The results showed that the application of different types of desensitizers had no significant influence on the SBS of the SARC to dentin.
BIOENGINEERING-BASEL
(2022)
Article
Engineering, Chemical
Leticia Virginia de Freitas Chaves, Boniek Castillo Dutra Borges
Summary: This study evaluated the various properties of experimental self-adhesive calcium-based cements for pulp capping purposes. These cements were compared with a commercial calcium hydroxide cement and showed higher bond strength values. The experimental cement containing calcium chloride demonstrated better overall behavior in terms of degree of conversion, calcium release, and viscosity.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2023)
Article
Dentistry, Oral Surgery & Medicine
Idris M. Mehdawi, Ranna Kitagawa, Haruaki Kitagawa, Satoshi Yamaguchi, Nanako Hirose, Tomoki Kohno, Satoshi Imazato
Summary: The aim of this study is to evaluate the maximum amount of chlorhexidine (CHX) that can be incorporated into self-adhesive resin cements to add antibacterial effect without affecting the physical properties. The results suggest that the addition of 5 wt% CHX can yield an antibacterial self-adhesive cement without adverse effects on physical properties.
DENTAL MATERIALS JOURNAL
(2022)
Article
Green & Sustainable Science & Technology
Tiancheng Yuan, Xinshun Yin, Yaqian Huang, Xiaoran Li, Xinzhou Wang, Lei Chen, Yanjun Li
Summary: This study analyzed the changes in the mechanics of bamboo cell walls after hydrothermal modification and revealed the tendency of mechanical properties from the bamboo inner layer to the bamboo outer layer. Additionally, hydrothermally modified bamboo samples exhibited excellent anti-mildew property.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Dentistry, Oral Surgery & Medicine
Felicitas Wiedenmann, Fabian Becker, Marlis Eichberger, Bogna Stawarczyk
Summary: The study found that different self-adhesive resin composite cements have varying levels of polymerization stress, and selecting resin composite cements with appropriate polymerization stress is crucial for the durability of restorations, especially for those made from ceramics with lower flexural strength.
CLINICAL ORAL INVESTIGATIONS
(2021)
Article
Nanoscience & Nanotechnology
Charles Miller, Christopher DellaCorte, Min Zou
Summary: The nanomechanical properties of hardened 60NiTi were studied using nanoindentation, revealing that the Ni3Ti phase has higher hardness and elastic modulus. The presence of Ni3Ti may indicate reduced amounts of Ni4Ti3, leading to lower overall hardness of the material.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Multidisciplinary
Jong-Ho Back, Chiwon Hwang, Dooyoung Baek, Dongwoo Kim, Youngchang Yu, Wonjoo Lee, Hyun-Joong Kim
Summary: This study investigates epoxy composites with tunable mechanical properties, including toughened polymers, elastomers, and pressure-sensitive adhesives, by adjusting the ratio of different types of epoxy resins. The results show that these epoxy composites can be used in structural adhesives and flexible electronics, exhibiting performance comparable to traditional tapes.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Construction & Building Technology
Ryan W. Sun, George C. Fanourakis
Summary: This research study assesses the performance of multiple concrete elastic modulus estimation models and finds that the ACI 363 model is the most accurate, while the CEB-FIP model is the least accurate. It is recommended to utilize the ACI 363 model in creep prediction models and it is noted that not all modified estimation models produce better estimates.
STRUCTURAL CONCRETE
(2022)
Article
Construction & Building Technology
Ryan Wok Sun, George C. Fanourakis
Summary: The study identified key factors influencing the elastic modulus of concrete, including aggregate type and concrete density. Concrete compressive strength has less influence on the estimation of E values and generally does not correlate significantly with E values.
STRUCTURAL CONCRETE
(2022)
Article
Chemistry, Physical
Saulo Geraldeli, Lucas de Almeida Maia Carvalho, Isaac Jordao de Souza Araujo, Mauricio Bottene Guarda, Marcelle M. Nascimento, Marcus Vinicius Loureiro Bertolo, Paolo Tulio Di Nizo, Mario Alexandre Coelho Sinhoreti, V. Wallace McCarlie
Summary: This study evaluated the performance of two arginine-containing orthodontic resin cements, finding that Orthocem + arginine resin cement can significantly reduce S. mutans growth, while Transbond XT remains unaffected.
Article
Polymer Science
Andreja Carek, Ksenija Dukaric, Helena Miler, Danijela Marovic, Zrinka Tarle, Matej Par
Summary: This study investigated the effect of different curing conditions on the degree of conversion and mechanical properties of contemporary dual-curing resin cements. The results showed that curing conditions had less influence on the degree of conversion, while material type had a greater impact on the mechanical properties.
Correction
Chemistry, Physical
Nicoleta Ilie
Article
Chemistry, Physical
Nicoleta Ilie
Summary: The appropriate selection of luting material is crucial for the longevity of indirect restorations, with mechanical behavior and aging behavior playing decisive roles. Material type has the strongest influence on properties, while aging can affect material reliability and viscoelastic parameters.
Article
Polymer Science
Andrei C. Ionescu, Allegra Comba, Eugenio Brambilla, Nicoleta Ilie, Lorenzo Breschi, Milena Cadenaro, Nicola Scotti
Summary: This in vitro study found that extended curing time can reduce microbial adherence and biofilm formation on bulk-fill resin-based composites, possibly due to improved photoinitiators and UDMA-based resin matrix composition. Such findings indicate potential implications for secondary caries occurrence and restoration longevity in comparison to conventional resin-based composites.
Article
Chemistry, Physical
Nicoleta Ilie
Summary: The placement of resin-based composites (RBCs) in large increments, known as bulk-fill RBCs, is becoming an increasingly accepted alternative to the classic incremental-layering technique. These materials have evolved from simple mechanisms to complex materials with novel polymerization mechanisms and bioactive properties. This study compares established bulk-fill RBCs with newer, less-studied materials and evaluates their relationship to dentin in terms of basic material properties. The results demonstrate the strong dependence of measured properties on the amount of filler and emphasize the potential for further development in RBCs.
Article
Engineering, Biomedical
Sandra M. Duma, Nicoleta Ilie
Summary: Computer aided design/manufacturing (CAD/CAM) technology is widely used in dentistry. This study evaluates the factors affecting the bond strength of CAD/CAM resin-based composites (RBCs), including surface preparation, aging, and luting materials. The results show that aging and surface treatment significantly influence the bond strength.
JOURNAL OF FUNCTIONAL BIOMATERIALS
(2022)
Article
Chemistry, Physical
Nicoleta Ilie, Andrei Cristian Ionescu, Karin Christine Huth, Marioara Moldovan
Summary: Modern light-cured, resin-based composites offer a wide range of shades and translucencies for aesthetic restoration, but the variation in pigmentation and opacifiers may affect light transmission during curing. This study quantified optical parameters and their real-time variation for a 13-shade composite palette, revealing a strong dependence of light transmission on shade. The study also identified colors with similar transmittance but different hues and found that darker shades had faster changes in light transmission.
Article
Chemistry, Physical
Nicoleta Ilie
Summary: Structural coloring of dental resin-based composites (RBC) is used to create universal chromatic materials. The microstructural adjustments involve nanoscale organic-inorganic core-shell structures. Higher polymer content in these structures compared to pigmented RBCs can influence aging. Accelerated and slow aging were compared, showing differentiated influences on the properties, especially in viscoelastic behavior. Accelerated aging had a greater effect, depending on the microstructure of the material.
Article
Materials Science, Composites
Nicoleta Ilie
Summary: Reversible addition-fragmentation chain transfer (RAFT)-mediated polymerization has been successfully applied in commercially available bulk-fill dental composites, optimizing polymerization at depth and reducing exposure time. The elastoplastic and viscoelastic behavior of the materials were compared in terms of microstructure and artificial aging. Aging had a significant impact on material behavior, but composition differences had minimal effect. The damping behavior was the most sensitive parameter to aging. Lab characterization showed comparable in vitro behavior with clinically successful materials.
JOURNAL OF COMPOSITES SCIENCE
(2023)
Article
Biotechnology & Applied Microbiology
Nicoleta Ilie
Summary: The development of resin-based composites involves considering trade-offs between different properties. Modern composites have smaller filler size for better esthetics, but this reduces mechanical properties and increases susceptibility to degradation. Our evaluation of various composites shows that nanospheres and agglomerations help generate good mechanical properties, but they are more prone to deterioration with aging. Pre-polymerized fillers have lower initial mechanical properties but are less sensitive to aging.
BIOENGINEERING-BASEL
(2023)
Article
Chemistry, Physical
Nicoleta Ilie
Summary: This article investigates the elastoplastic and viscoelastic response of an industrially cured CAD/CAM resin-based composite under different scales, spatial locations, aging conditions, and shading. The nano- and micro-scale measurements were more discriminative in identifying the impact of variables, while anisotropy as a function of spatial location was observed in all shades.
Article
Chemistry, Physical
Franz-Josef Schroeter, Nicoleta Ilie
Summary: This study compared the pushout test and the shear test in vitro to assess their clinical relevance in terms of cavity geometry and configuration factor. However, the pushout test had a significantly higher number of invalid measurements compared to the shear test, indicating the need for improvement.
Article
Engineering, Biomedical
Nicoleta Ilie, Marioara Moldovan, Andrei C. Ionescu
Summary: One of the recent trends in resin-based composites is the use of universal coloring to avoid time-consuming color matching. In this study, an experimental material combining universal coloring and bulk-fill placement was evaluated for posterior restorations. The microstructural features were analyzed using scanning electron microscopy and related to the macroscopic and microscopic mechanical behavior. The materials met the standard requirements even after aging, with strength being the only parameter affected significantly. The results suggest that an increased filler amount is critical for better mechanical properties, although the type of filler and microstructure also play a role.
JOURNAL OF FUNCTIONAL BIOMATERIALS
(2022)
Article
Biotechnology & Applied Microbiology
Nicoleta Ilie
Summary: Universal chromatic dental resin-based composites have innovative color formation methods and their mechanical properties are relatively poor, which are also influenced by aging.
BIOENGINEERING-BASEL
(2022)
Article
Engineering, Biomedical
Nicoleta Ilie
Summary: This study investigated the mechanical property changes of four resin-based composites under storage and simulated clinical conditions, and found that degradation occurred in all conditions. This indicates that although modern composites have high clinical survival rates, biodegradation remains an issue that needs to be addressed.
JOURNAL OF FUNCTIONAL BIOMATERIALS
(2022)
Article
Biotechnology & Applied Microbiology
Franziska Beck, Nicoleta Ilie
Summary: This study aimed to evaluate the effect of riboflavin-sensitized crosslinking on the bond strength between dentin and dental resin composite. The results showed that the different application methods of riboflavin significantly influenced bond strength, with a significant advantage for the riboflavin group compared to the riboflavin-incorporated primer group. This advantage is attributed to the pH-/solvent-dependent efficiency of riboflavin-sensitized crosslinking. The study provides an application protocol for riboflavin-sensitized crosslinking and suggests that it can improve the longevity of adhesive restorations in clinical settings with some adjustments.
BIOENGINEERING-BASEL
(2022)
