<prompt> Which generation of flowable composite can be used as restorative material?1st generation2nd generation3rd generationAll of the above  <response>: Because flowable composites were developed with specific handling characteristics in mind,their range of advertised clinical uses is quite varied.Within the range of materials classified as flowable composites, those with lower filler content often referred as generation 1 flowable composites are intended for uses such as pit-and-fissure sealants or small anterior restorations. Those with higher filler content also referred as generation 2 flowable composites have been suggested for use in Classes I, II, III, IV, and V restorations, although they are better suited only for very conservative restorative procedures. In general, the mechanical properties of flowable composites are inferior to those of standard hybrid composites. 