Microporous glassy fillers for dental composites

Abstract
A microporous filler giving greatly improved finishability, systemic nontoxic X‐ray opacification, low thermal expansion (27.2 × 10−6/°C), and satisfactory translucencies has been developed for dental composite resin restorations. These fillers are prepared from frits obtained by the low‐temperature calcination of gelled inorganic sols followed by a pulsed high‐temperature treatment. Composites prepared from these fillers are within the range of commercial products with regard to strength and setting contraction.

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