ABSTRACT
Epoxy clay nanocomposites have been proven to have improved mechanical, thermal and physical properties over pristine matrix. Thus, the fields of application of epoxy-clay nanocomposites along with their hybrid glass/carbon fibre reinforced composites have grown tremendously during the last few decades. The present review paper covers the research work performed on epoxy clay nanocomposites. It includes the influence of the processing techniques and parameters on the morphology of the nanocomposite, the methods of characterization and the effects of adding nanoclay on the mechanical and physical properties of composite. The improvements in the liquid barrier properties brought about by the addition of nanoclay platelets to epoxy resin are discussed. The variation of physical and mechanical properties with nanoclay type and content are reviewed along with the effects of moisture uptake on these properties. The advances in the development, characterization and applications of hybrid glass fibre reinforced epoxy-clay nanocomposites are discussed. Findings of the research work on the influence of nanoclay addition and exposure to water laden atmospheres on the behaviour of the hybrid glass fibre epoxy-nanoclay composites are presented. Finally, the potential health and environmental issues related to nanomaterials and their hybrid composites are reviewed.
ABSTRACT
BACKGROUND: Recently quantitative evaluation of gingival zenith position was evaluated in different facial forms suggesting clinicians may need to evaluate patients facial form and then decide to distalise the Gingival Zenith position in relation to Vertical Bisected Midline (VBM). The aim of the study was to quantitatively evaluate the gingival zenith width in convex, concave and straight facial profiles for Saudi, Indian and Bangladeshi nationals. MATERIALS/METHODS: 114 subjects of each Saudi, Indian & Bangladeshi nationality were grouped into convex, concave and straight profile based on angle of convexity. Gingival zenith position (GZP) on #11 and #21 was evaluated on the scanned dental plaster model using CBCT. Inter and Intra group comparison was done using one-way ANOVA test. RESULTS: Mean GZP values ranged from 0.84â¯mm to 1.10â¯mm, 0.75â¯mm to 1.02â¯mm and 0.87â¯mm to 1.14â¯mm for Saudi, Indian and Bangladeshi subjects respectively. Statistically significant (pâ¯<â¯0.05) difference was observed in convex, concave and straight profile subjects of these nationalities. CONCLUSION: GZP variation does exist in different facial profiles of Saudi, Indian & Bangladeshi nationalities with respect to central incisors. CLINICAL SIGNIFICANCE: These findings help clinician to consider facial profile as important entity in designing the smile following restorative and prosthetic procedures such as crown lengthening, teeth selection, implant esthetics and laminates.
ABSTRACT
Ochrobactrum anthropi is a gram-negative rod of low virulence. Infections due to this organism are uncommon; however in immunocompromised hosts it can cause severe infections. Among the many infections it can cause, infective endocarditis is very rare. Even rarer is infective endocarditis of the native valves, as Ochrobactrum antropi affects damaged or prosthetic valves almost exclusively. This case describes native valve endocarditis due to Ochrobactrum anthropi. [Full article available at http://rimed.org/rimedicaljournal-2016-07.asp, free with no login].
Subject(s)
Dialysis/adverse effects , Endocarditis, Bacterial/diagnosis , Gram-Negative Bacterial Infections/diagnosis , Ochrobactrum anthropi/isolation & purification , Shock, Septic/etiology , Anti-Bacterial Agents/therapeutic use , Atrial Fibrillation , Echocardiography , Endocarditis, Bacterial/diagnostic imaging , Female , Gram-Negative Bacterial Infections/drug therapy , Humans , Middle AgedABSTRACT
Drug-induced pericarditis is a well-described cardiac pathology that can result from a variety of medications; however, interferon-mediated pericarditis is extremely rare. We present a case of a young female with recurrent pericarditis due to interferon therapy. The role of interferon in adjuvant chemotherapy is well known and yields good effect, but this case highlights the very uncommon phenomena of interferon induced pericarditis and the significant distress it can cause.