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Microscopic observations of the wear of a tooth restorative compositein vivo

✍ Scribed by Abell, A. K. ;Leinfelder, K. F. ;Turner, D. T.

Publisher
John Wiley and Sons
Year
1983
Tongue
English
Weight
413 KB
Volume
17
Category
Article
ISSN
0021-9304

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✦ Synopsis

Abstract

The wear of a composite restorative material in the oral cavity was followed by examining impressions by scanning electron microscopy. It was demonstrated that filler particles protrude from the polymeric matrix and, eventually, are lost leaving holes in the surface. A measure of the rate of wear was obtained by following the reacession of the matrix on the faces of a large prominent particle. For a restoration that had been in place for 7 years, the average rate of wear over a further period of several months was estimated to be about 0.1 ΞΌm/day. For comparison, the gross wear of 2 mm over the entire 7‐year period gives a greater average rate of wear of 0.8 ΞΌm/day.

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