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Effects of Thermal Cycling on Surface Hardness, Diametral Tensile Strength and Porosity of an Organically Modified Ceramic (ORMOCER)-Based Visible Light Cure Dental Restorative Resin
Published in P. Mereena Luke, K. R. Dhanya, Didier Rouxel, Nandakumar Kalarikkal, Sabu Thomas, Advanced Studies in Experimental and Clinical Medicine, 2021
Dental restorative polymer composite materials based on polymerizable bisphenol-A glycidyl methacrylate (Bis-GMA) monomers [1, 2] and quartz/radiopaque glass fillers has been the most popular materials used in dentistry, since Bowen [1, 2] introduced (Bis-GMA) in the 1960s. Though they have good aesthetic and physical properties [3], attempts including few structural variations in the organic matrix of dental composites are going on to improve the clinical performance of restorative materials [4–14]. Among these modifications, urethane dimethacrylates (UDMAs), [4] urethane tetramethacrylates, [5] organically modified ceramics (ORMOCERS) [6,-13], and bioactive materials [14] are included.
Principles of foot and ankle orthoses
Published in Maneesh Bhatia, Essentials of Foot and Ankle Surgery, 2021
The material choices available to those prescribing orthoses have changed considerably since the use of metal, leather and fabric in the early part of the 20th century (Figure 4.1). With material science advances, the materials that are designed to be strong can now also be lightweight. Composite material advances also mean that devices can be built to give both maximum strength and flexibility where it is needed within the gait cycle.
Biomaterial, Host, and Microbial Interactions
Published in Mary Anne S. Melo, Designing Bioactive Polymeric Materials for Restorative Dentistry, 2020
A composite material, by definition, is a product that is formed by the interatomic interactions between two or more components, resulting in superior properties to those of the individual components alone (Dogon 1990). The four major components of dental resin composites are (1) a polymeric matrix, (2) inorganic filler particles, (3) coupling agents such as silanes, for binding the filler to the matrix, and (4) an initiator/inhibitor polymerization system (Santerre et al. 2001).
Interaction between microorganisms and dental material surfaces: general concepts and research progress
Published in Journal of Oral Microbiology, 2023
Yan Tu, Huaying Ren, Yiwen He, Jiaqi Ying, Yadong Chen
Since ceramic materials were introduced to the dental restoration field, they have been widely used because of their good biocompatibility and aesthetic effects. However, ceramics’ inherent defects, such as insufficient strength and brittleness, have significantly limited their application in dental restorations. Ceramic nanomaterials are composite materials. Nano-sized ceramic particles, whiskers, fibers, etc., are added to the ceramic matrix to improve the performance of ceramics. Ceramic nanomaterials can be synthesized by rapid cooling after heating at high temperatures, a nanoscale inorganic metalloid solid. Since ceramic nanoparticles are more stable than metallic nanoparticles and have lower production costs, they are widely used in dental restorative materials [32]. Imran et al. showed that hydroxyapatite-based nanoparticles could promote mineralization in early carious lesions by combining with the porous tooth structure caused by the caries process to increase its mineral content and hardness [33]. Another study showed that bioactive glass-based nanoparticles could improve the regeneration of dentin, cementum, and bone in pulp or periodontal tissues by adding variable doping materials to promote hard tissue regeneration [34]. Antimicrobial nanoparticle-conjugated ceramic minerals can provide dual functions to prevent the formation and development of dental caries.
Prediction of abrasive wears behavior of dental composites using an artificial neural network
Published in Computer Methods in Biomechanics and Biomedical Engineering, 2023
Abhijeet Shivaji Suryawanshi, Niranjana Behera
Artificial dental material is the vital aspect of a removable dental replacement in re-establishing capacity, esthetics, and the process of producing vocal sound (Denli et al. 1996; Koksal and Dikbas 2008). In dentistry, composite materials have been widely used for restoration purposes. The restorative material should possess excellent physical and mechanical properties (Kawano et al. 2002). New forms of prosthetic teeth made from modified acrylic resin with cross-linking agents and resin composite including various types of filler are becoming more popular (Powers and Wataha 2008; Heintze et al. 2012). The type, volume, and distribution of filler particles reinforcing in the resin determine the composites' strength. Particulate fillers are commonly used in composites for a variety of reasons, including cost savings, better processing, wear resistance, optical effects, density control, and enhanced hardness (Pati et al. 2018; Pati and Satpathy 2019). However, there is a scarcity of evidence-based information about the composition and characteristics (Loyaga-Rendon et al. 2007).
Fracture resistance of Ceramic-Polymer hybrid materials using microscopic finite element analysis and experimental validation
Published in Computer Methods in Biomechanics and Biomedical Engineering, 2022
Brendan Sodergren, Jing Wang, Yu Zhang, Jeongho Kim
The method of finite element analysis, as highlighted in this study, will provide the dental industry with an approach to a complementary material response analysis to the traditional method of laboratory testing (Vaidya and Kim, 2013). This study focuses on the use of composite materials, specifically PICN materials, for restorative dental applications. Recent studies from our laboratories and elsewhere have demonstrated that PICN material (Enamic, Vita Zahnfabrik) exhibits some promising properties in resistance to contact and flexural damage (Coldea (2014), Coldea et al. (2013, 2014), He and Swain (2011), Facenda et al. (2018), Ongun et al. (2018), El Zhawi et al. (2016)). In vitro testing and corresponding calculation of the mechanical properties of the tested PICN material was reported in Della Bona et al. (2014). However, the physics behind physical phenomena in PICN has not been fully understood.