Effect of nanohydroxyapatite, antibiotic, and mucosal defensive agent on the mechanical and thermal properties of glass
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ARTICLE Effect of nanohydroxyapatite, antibiotic, and mucosal defensive agent on the mechanical and thermal properties of glass ionomer cements for special needs patients Manila Chieruzzi Civil and Environmental Engineering Department, UdR INSTM, University of Perugia, Terni 05100, Italy
Stefano Paganoa) and Guido Lombardo Department of Biomedical and Surgical Sciences, School of Medicine, Odontostomatological University Centre: Chair Prof. Stefano Cianetti, University of Perugia, Perugia 06156, Italy
Lorella Marinucci Department of Experimental Medicine Section of Biosciences and Medical Embriology, University of Perugia, Perugia 06156, Italy
José M. Kenny and Luigi Torre Civil and Environmental Engineering Department, UdR INSTM, University of Perugia, Terni 05100, Italy
Stefano Cianetti Department of Biomedical and Surgical Sciences, School of Medicine, Odontostomatological University Centre: Chair Prof. Stefano Cianetti, University of Perugia, Perugia 06156, Italy (Received 27 October 2017; accepted 5 February 2018)
Special needs patients often require specific dental treatments and modified restorative materials that reduce clinical discomfort. Starting from glass ionomer cements (GICs), some different fillers were added to improve their mechanical and clinical performances. The effect of nanohydroxyapatite, antibiotic, and mucosal defensive agent on the mechanical and thermal properties of GICs was investigated. Compressive tests, calorimetric analysis, and morphological investigation were conducted. The middle percentages of fillers increased the elastic modulus while the highest decreases are recorded for highest percentages. Filler and environment also influence the compressive strengths and toughness. The introduction of fillers led to a reduction of the enthalpy with a maximum decrease with the middle percentage. The morphological characterization showed a good dispersion of the fillers. The filler percentages should be selected with a compromise between the elastic modulus, the compressive strength, and the curing time. Obtaining new materials with good clinical and mechanical properties can represent an innovative aspect of this work with positive implication in clinical practice, mainly in uncollaborative patients in which the use of traditional protocols is problematic.
I. INTRODUCTION
Contributing Editor: Jinju Chen a) Address all correspondence to this author. e-mail: [email protected] DOI: 10.1557/jmr.2018.36
due to the poor adhesion and bisphenol A (and its components) estrogenicity were expressed.4–6 Among different conservative techniques, the atraumatic restorative treatment (ART) is an innovative dental treatment for special needs patients with an important impact on public health due also to the low cost factors.7 The main characteristic of the ART technique is the partial caries removal since in this way, only the softened (infected) dentine is removed from carious tissue.8 This partial removal is an acceptable procedure because the affected dentine still presents a remineralization ca
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