The effect of storage media upon the surface microhardness and abrasion resistance of three composites R.G. Chadwick J.F. McCabe A.W.G. Walls R. Storer The Dental School Framlington Place Newcastle upon Tyne NE2 4BW United Kingdom Received June 22, 1989 Accepted March 20, 1990 Correspondence should be addressed to Dr. R.G. Chadwick, Department of Conservative Dentistry, Dental School, The University, Dundee, DD1 4HN, UK. Dent Mater 6:123-128, April, 1990

Abstract-The effects of various storage media [distilled water, lactate (pH 4.0), and citrate (pH 6.0) buffers] upon the hardness and wear factor values of three composites [Occlusin (0), P-30 (P), and FulFil (F)] were studied. Over the one-year storage period, the hardness of all three materials stored in citrate buffer was unchanged. In the case of P in water and all materials stored in lactate buffer, a reduction was observed. There was no significant difference (P > 0.05) between the wear factors of specimens after one year or one week of water storage. Specimens of F stored in citrate buffer had a wear factor (P0.05) between the values. A two-way analysis of variance was performed to compare the wear factor values obtained following storage in distilled water for one year with those of the specimens stored in the buffer solutions. Highly significant effects of the material type (P

The effect of storage media upon the surface microhardness and abrasion resistance of three composites.

The effects of various storage media [distilled water, lactate (pH 4.0), and citrate (pH 6.0) buffers] upon the hardness and wear factor values of thr...
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