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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.
An Introduction to Bioactivity via Restorative Dental Materials
Published in Mary Anne S. Melo, Designing Bioactive Polymeric Materials for Restorative Dentistry, 2020
Mary Anne S. Melo, Ashley Reid, Abdulrahman A. Balhaddad
“Bioactive” material is not a new term to dentistry, but inexperienced for direct restorative materials, especially for resin-based dental composites. Over the past decade, the search for a response to clinical needs imposed by an increased rate of secondary caries around faulty restorations has led to a growing exploration of this topic. The search for impairment of bioactivity in resin-based restorative material has led to a broad perspective about how a material can be defined as bioactive (Chatzistavrou et al. 2018).
The effects of heavy metals on human metabolism
Published in Toxicology Mechanisms and Methods, 2020
This article discusses the various hazards associated with heavy metal exposure on human metabolism. However, it is important to understand the methods by which the public come into contact with heavy metals, in order to avoid further contact. Based on previous research results, for many people regulatory limits have been exceeded and they are at the threshold of developing major organ toxicity. Governments must therefore take important steps to protect the population from this potential hazard to people’s health by advising people to avoid fish species that contain high levels of arsenic and mercury(Salnikow and Zhitkovich 2008). Therefore, contaminated water must be treated before it can be released into the environment to ensure that safe drinking water is available to the public. In terms of agricultural safety, arsenic-containing herbicides should be replaced by safer alternatives. Unlike Amalgam fillings, dental composite fillings should always be used. Removal of heavy metals from water can be done through ion exchange (Tariq et al. 2008), adsorption, membrane filtration and electrodialysis (Chen 2004). Therefore, we need to establish a defense mechanism to prevent exposure to heavy metals, which increases the content of reactive oxygen species (Ros) in the human body and eventually induces a series of oxidative damage processes. In future, more research is needed to ensure that human health is protected and is safe from the effects and hazards of heavy metals.
The use of different adhesive filling material and mass combinations to restore class II cavities under loading and shrinkage effects: a 3D-FEA
Published in Computer Methods in Biomechanics and Biomedical Engineering, 2021
P. Ausiello, S. Ciaramella, A. De Benedictis, A. Lanzotti, J. P. M. Tribst, D. C. Watts
Resin based dental composites polymeric materials become innovative in restorative dentistry for direct application in dental decay treatment. This restorative material can be applied to aesthetically and functionally rebuild the injured teeth with direct restorations (Sideridou et al. 2011; Yazici et al. 2014; Borgia et al. 2019). Different potential cytotoxic risk effects of dental composites have been described in the past and associated to the resin monomers composition during in vitro tests (Ausiello et al. 2013; Treglia et al. 2012). But there is no clinical evidence reported.
Biological aspects of modern dental composites
Published in Biomaterial Investigations in Dentistry, 2023
Jan Tore Samuelsen, Jon E. Dahl
The ability to perform as desired without eliciting undesirable effects is commonly referred to as the biocompatibility of a biomaterial. Since the composition of available composites varies depending on the intended application, biocompatibility may also differ. Primarily, dental composites perform well in their task of restoring tooth function. However, both in vitro studies and clinical observations reveal a potential in dental composites to cause side effects. Awareness of such properties and understanding the underlying causes are essential when aiming for the safe use of composites.