[The abrasion of composites in the region of the lateral teeth--results after 3 years].

Twenty patients managed with Adaptic, Concise-capsule, Epoxydent, and a dispersion alloy (all class II cavities) were re-examined after three years. Between 20% to 45% of the composite fillings had been replaced in this time period, but only 5% of the amalgam fillings had been renewed. Marginal defects were diagnosed with the probe in 53% to 89% of the composite fillings (amalgam, 21%); marginal discoloration was observed in 61% to 100% of the cases. With the exception of Adaptic (discolorations found in "only" 44% of the cases), all other composite fillings were discolored (100%). The following reduction in tooth structure was noted after a three year period: amalgam, 0 micron +/- 112 micron; Expoxydent, 56 micron +/- 138 micron; Adaptic, 224 micron +/- 151 micron; Concise, 201 micron +/- 93 micron.