[Hardness of composite materials used for restoration of front teeth]

The evaluation comprised four anterior two-components composite materials: concise-"B", concise-"T", adaptic and silar and six anterior one-component composite materials: heliosit, visio-dispers, visio-fill, durafill, estilux and prisma-fill. The Amsler press of 600-2000 kg was used for evaluation of hardness on pressure, flexion and extension of 10 composite materials using the original "accessory apparatus" PAC-s and PAC-e. For evaluation of hardness 15 samples of each material were made. On the basis of the results obtained it has been concluded that no evenly regular dependence exists among the evaluated hardness of different composite materials so it is necessary to evaluate all three hardness for their adequate categorization. Taking into account levels of all three hardness, AJKM was recommended as better material than ADKM, while some of them are much better (such as estilux, prisma-fill and visio-fill) for restoration of angular defects of teeth structures of crowns of anterior teeth.