SYNTHESIS AND CHARACTERIZATION OF POLYMER COMPOSITES REINFORCED WITH STRONTIUM TITANATE-BASED NANOPARTICLES FOR DENTISTRY APPLICATIONS

مشروع البحث:
SYNTHESIS AND CHARACTERIZATION OF POLYMER COMPOSITES REINFORCED WITH STRONTIUM TITANATE-BASED NANOPARTICLES FOR DENTISTRY APPLICATIONS

dc.contributor.advisor	Dr Ivana Stajčić
dc.contributor.advisor	Dr Vesna Radojević
dc.date.accessioned	2026-06-10T08:50:29Z
dc.date.available	2026-06-10T08:50:29Z
dc.description	this broad context, perovskite-structured strontium titanate (SrTiO3) has emerged as a ceramic material with a potential for biomedical applications [6,7]. It combines high Young’s modulus, hardness and thermal stability, with promising bioactivity and antibacterial behaviour in other implant-related systems. Along with SrTiO3, manganese oxide (MnO2) and yttrium oxide (Y2O3) are known for their chemical stability, potential antibacterial effects and established biocompatibility, especially Y2O3, in the context of yttria-stabilized zirconia [8,9]. These oxides have largely been used either in bulk ceramics or as coatings, rather than as fillers in dental polymers and only a few reports have examined their direct incorporation into PMMA. In some of those earlier attempts, for instance, with neat Y2O3, mechanical performance deteriorated because large, stiff particles created severe inhomogeneity and stress concentratiions spots, showing that filler chemistry alone is not enough; particle size, agglomeration behaviour and interfacial properties are equally important. Recently, composite engineering turned from single fillers towards hybrid systems that combine two or more phases to exploit synergistic effects
dc.description.abstract	Poly(methyl methacrylate) (PMMA) is still the dominant material for denture bases and many removable prosthetic devices because it is inexpensive, easy to process, aesthetically acceptable and generally biocompatible [1,2]. Conventional heat-cured PMMA is inherently brittle, with relatively low impact strength, limited fatigue resistance and susceptibility to crack initiation at stress concentrators such as porosity, microvoids and surface defects [3]. Fracture of dentures under functional or accidental loads is therefore a frequent clinical problem, leading to patient discomfort, additional chair time and increased economic burden. The underlying problem is that conventional PMMA cannot provide at the same time high hardness, sufficient stiffness and tensile strength for dimensional stability, and adequate toughness to dissipate impact energy without catastrophic cracking [4]. To address these shortcomings, numerous studies have explored the incorporation of inorganic fillers, microparticles, fibers and later nanoparticles, into the PMMA matrix [5]. Classical ceramic reinforcements such as alumina, silica, titania and zirconia have improved particular properties, such as hardness or flexural strength, but often at the cost of others, including impact resistance, aesthetics or ease of processing. In several cases substantial filler loadings were required to obtain meaningful strengthening, which raised concerns about inhomogeneity, incomplete wetting, agglomeration and weakening of the denture base in service. More recently, bioactive and antibacterial fillers (certain metal oxides or graphenic phases) have been used to introduce additional functionalities, but they also face the recurring challenge of balancing mechanical performance with dispersion quality, interfacial adhesion and long-term biocompatibility
dc.identifier	1321
dc.identifier.uri	https://dspace.academy.edu.ly/handle/123456789/2261
dc.subject	CHARACTERIZATION OF POLYMER COMPOSITES REINFORCED
dc.title	SYNTHESIS AND CHARACTERIZATION OF POLYMER COMPOSITES REINFORCED WITH STRONTIUM TITANATE-BASED NANOPARTICLES FOR DENTISTRY APPLICATIONS
dspace.entity.type	Project
project.endDate	2025
project.funder.name	اسنان
project.investigator	هدى الطاهر الهمالي ابراهيم
project.startDate	2024