Build-up and repair of light-cured composites: bond strength.


Interfacial bond strengths of light-activated composites were measured as a function of age using a transverse strength test. Bond strength between layers decreased with the age of the initial layer and reflected the setting curves of the composites. The highly-filled composites exhibited the greatest bond strengths. Uncut surfaces provided a better substrate for bonding than did ground surfaces. Use of a bonding agent on both uncut and ground surfaces improved bond strengths. Mean repair strengths of light-activated composites were similar to those of self-curing composites. Composites with ground surfaces aged for one wk had mean repair strengths 27% of the cohesive strength without bonding agent and 48% with bonding agent.


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@article{Boyer1984BuildupAR, title={Build-up and repair of light-cured composites: bond strength.}, author={Daniel Boyer and Kwan Chuen Chan and John W Reinhardt}, journal={Journal of dental research}, year={1984}, volume={63 10}, pages={1241-4} }