Читать книгу Manual of Laboratory Testing Methods for Dental Restorative Materials - Paromita Mazumdar - Страница 20

All materials require different hardness testing. The specificity of a hardness tester is dependent on the following factors:

1 Material of the indenter

2 Shape and size of the indenter and the sample to be tested.

3 Loading parameter (amount of force it can apply)

Hardness tests are extremely used and have important applicability on Dentistry. Hardness test can evaluate the degree of mineralization of a dental substrate for example. A specific force applied for a specific time and distance provides important data in studies assessing the ability of enamel and dentin remineralization after different treatments as happens in unbalanced situations of des‐remineralization. Another important use of this test is to evaluate the degree of polymerization of resin composite and resin cements.

Figure 1.17 Stress–strain curve for assessment of Young's modulus.