Introduction. For many years, attempts have been made at finding a suitable fiber for increasing the mechanical properties of flowable dental composites.The aim of the present study was to elevate the compressive strength of flowable dental composites using nanocellulose, as well as tissue biocompatibility assessment of the composition of nano-celloluse, investigated in rat subcutaneous tissues, for a possible extension of its use. Materials and methods.nanocellulose from microcrystalline cellulose was synthezised by sulfuric acid, then added to flowable composite to evaluae its compressive strength by ISO 9917. The six experimental groups included five resin composites containing nanocellulose of different concentrations – 1, 2, 3, 4 and 5 wt.% – and a control group with no additive. The method used for biocompatibility assessment is subcutaneous implantation, according to which the substance is placed in polyethylene and then implanted into the subcutaneous connective tissue.Results and discussion.The results obtained showed a significant increase (of about 74%) in the compression strength of flowable dental composite (p>0.05), and a good biocompatibility.Conclusions. The use of 2% nanocellulose leads to an increase in the compressive strength of the flowable dental composite and permits their utilization in stressed areas.
Keywords:- biocompatibility.
- compressive strength
- dental materials
- flowable dental composite
- nanocelloluse