Influence of storage humidity on hardness of light-cured glass polyalkenoate cements

Dental Materials Journal
S Tsuruta, J Viohl

Abstract

The influence of storage in various environments on the hardness of four commercial light-cured glass polyalkenoate cements and one conventional glass polyalkenoate cement was investigated. Specimens with or without light exposure were stored for 7 days in different humidity conditions. A hardness tester with a diamond indenter point was used and Vickers hardness numbers under minor load conditions were determined. Non-light-exposed specimens did not increase in hardness in either dry or wet conditions. Light-exposed specimens became harder with time in dry conditions. Light-exposed specimens stored in wet conditions hardened only slightly. To investigate the effects of humidity, some light-exposed specimens stored first in wet conditions were stored another 7 days in dry conditions. They became as hard as those first stored in dry conditions for 7 days. It is concluded that the hardness of these cements corresponds with the humidity of the storage environment.

Citations

Dec 22, 2000·Dental Materials : Official Publication of the Academy of Dental Materials·K OkadaW R Hume
Apr 11, 2003·Dental Materials : Official Publication of the Academy of Dental Materials·J EllakuriaF García-Godoy
Aug 11, 2009·Dental Materials Journal·Nuran YanikoğluBaykal Yilmaz

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