17 research outputs found
Calcium Hydroxide Pulp Capping Agent: An Overview on Composition, Properties, and Clinical Applications
Calcium hydroxide is a commonly used material in pulp capping procedures due to its favourable biological properties, including the ability to promote dentin bridge formation and stimulate reparative dentinogenesis. The mechanical properties of calcium hydroxide, including its compressive strength, flexural strength, and wear resistance, are relatively low, but they are not critical properties in pulp capping procedures. However, the composition and formulation of calcium hydroxide can vary depending on the manufacturer, and this can affect the material's physical and chemical properties, as well as its handling characteristics. Despite these variations, calcium hydroxide remains a popular choice for pulp capping due to its favourable biological properties and its long-standing history of use in dental procedures
Revalorisation of Posidonia Oceanica as Reinforcement in Polyethylene/Maleic Anhydride Grafted Polyethylene Composites
Posidonia Oceanica waste was used as reinforcement in a polyethylene matrix and the obtained composites
were characterised by a tensile test and morphological analysis. The fi brous material derived from P. Oceanica
wastes was characterised by morphological, thermal and chemical analysis, and a subsequent treatment with
sodium hydroxide (NaOH) at different weight content (2, 5 and 10 wt%) was considered as an optimised
method for surface modifi cation of pristine fi bres (PO). The TGA analysis and morphological investigation
of the treated fi bres selected the 5 wt% of NaOH as the best treatment. Matrix compatibilisation with maleic
anhydride grafted polyethylene was also considered and the effect on both grafting procedure and alkali
treatment was studied for composites containing 20 wt% of fi bres. The results confi rmed that it is possible to
aim for a revalorisation of coastal algae and seaweed wastes as raw material for polyolefi n matrix composites,
even without applying a strong chemical treatment to the wast