Tensile Strength of Human Dentin

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Abstract
Tension-specimens of human dentin was prepared for the Hounsfield Tensometer to establish a value for its tensile strength. Only sound, caries-free, fresh teeth whose roots were of sufficient size to permit the preparation of such specimens were used. The results of 100 tests are presented. There are considerable variations in teeth from different patients (the lowest figure being around 3,000 psl, while the upper limit may be well over 7,000 psi). The tensile strength of human dentin is only 1/6 or 1/7 of Its compressive strength. Specimens reloaded after reaching 7,000 psi without fracture, did not always reach this 1st value again but fractured at a lower figure.

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