The tensile strength of composite repairs

The interfacial (bond) strength established between composite additions and recently set composite or matured composite (of the same type) has been determined by means of tensile fracture stress. Five different composite products were selected for examination, which covered the variety of matrix compositions available today. The effect of saliva contamination of the surface before making additions to recently set composite has been quantified, as has the effect of pre-treating the matured material before repair.