POLYMERIZATION SHRINKAGE, DEGREE OF CONVERSION, DEPTH OF CURE, AND HEAT GENERATION OF NOVEL EXPERIMENTAL AND COMMERCIAL COMPOSITE

Objective:
 To compare and characterise commercial control composites. By characterising these composites, target properties for new experimental dental composites can be outlined.
 Materials Methods:
 Three commercial, two were compared investigated. The composition of materials provided from published literature manufacturer’s information. changes in intensity spectral peaks that involved free radical addition polymerization used to determine the degree conversion using FTIR (n=6). samples prepared 1 mm, 4 mm thickness cured 40 s top. Depth cure, Polymerization shrinkage heat generation determined data, equations.
 Results:
 Gradia, Z250 significantly lower than flowable Vertise flow, C-HEMA, C-4 META both depth. shrinkage, values suggests opposite trends conversion. With highest associated with flow. Depths cure all range 2.28 2.49 at 20 s, cure.
 Conclusion:
 composite added monomers had potential compete commercially available without compromising properties.