Effects of heating on the mechanical properties of human dentin
E. Koytchev
Abstract: The aim of this study was to investigate the effects of heating on the mechanical properties of human dentin by focusing on dentinal tubular orientations. Mechanical changes of human dentin by heating at 140°C were investigated by scanning electron microscope (SEM) fractographic observations.
The work discovered that the heating significantly changes the mechanical properties of human dentin. Especially flexural and tensile strengths of human dentin increase 2-2.4 times after being heated to 140°C, and it has been deduced that the generation of higher-density structures and therefore dehydration probably promoted the increased strength. Our test hypothesis was that intertubular dentin, which constitutes a major part of organic components, was selectively affected by heating.
These results suggest that intertubular dentin, which contains most of the collagen type I, was affected by heating at 140°C.
The work discovered that the heating significantly changes the mechanical properties of human dentin. Especially flexural and tensile strengths of human dentin increase 2-2.4 times after being heated to 140°C, and it has been deduced that the generation of higher-density structures and therefore dehydration probably promoted the increased strength. Our test hypothesis was that intertubular dentin, which constitutes a major part of organic components, was selectively affected by heating.
These results suggest that intertubular dentin, which contains most of the collagen type I, was affected by heating at 140°C.
Keywords: collagen; Dentin; mechanical properties; tubular
Date published: 2015-04-09
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