[The properties of dentin and resinified dentin in the tensile test].
The purpose of this study is to evaluate the effect of resinifying therapy to the hard tissue of tooth by using measurement of the tensile strength. The fresh extracted maxillary anterior teeth having been cleaned and sterilized were divided into two groups. The control group was placed into 9% N-saline solution of 37 +/- 1 degrees C. The experimental group was treated with resinifying therapy. The tensile specimens were shaped by turning in a lathe until it satisfied the tensile test requirement of Mechanics of Materials except that they were hollow. A set of special split jig was made for this test. Instron Universal Testing Machine was used for measuring the load on the specimens. The loading speed was 0.05 mm/min. The straining meter was used to measure the tensile strain. The result revealed that tensile strength of resinifying dentin was little lower than that of unresinified dentin. The resinified dentin didn't increases stiffness or brittleness.
Xu
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D000180:Acrylic Resins / Q000627:therapeutic use; D000368:Aged; D001696:Biomechanical Phenomena; D003481:Cuspid; D003793:Dental Restoration, Permanent; D003804:Dentin / Q000502:physiology*; D004548:Elasticity; D005260:Female; D006801:Humans; D007180:Incisor; D008297:Male; D008875:Middle Aged; D013718:Tensile Strength / Q000187:drug effects
D000180:Acrylic Resins