Physico-mechanical properties of biological tissues

The studies of physical and mechanical properties of organs tissues are presented on the basis of literary and own experimental and calculation data.

The results of measuring the elastic fashion of lei and the on -hardness of intact enamel and enamel with caries, as well as the study of the impurities of the enamel of the teeth after cooling to ultra -low temperatures (4.2 K).

The attitude of H/E and the viscosity of the destruction of enamel and dentin are analyzed in comparison with other materials.

Visualized the matrix of elastic constant dentin and enamel.

The elastic modules, the parameters of elastic anisotropy and the puisson dentin and enamel coefficient as anisotropic medal of hexagonal algonia are considered. The possibility of this approach is explained by data on the morphology of the hard tissues of the tooth as a biocomposite with a collagen matrix and mineral components in the form of apatitis crystals.

Within the framework of this model, it was established that the Poisson Dentin coefficient in some directions is higher than the theoretical limit of 0.5 for isotropic materials, including composite ones, which may affect the quality of restorations. It was also found that the minimum values ​​of the Poisson Coema Dentin and enamel are more than zero, that is, both dentin and enamel are not auxes - materials with a negative Poisson coefficient.

data on the elastic properties and strength of the perose tissues, the periodontal ligament and the oral mucosa, as well as hydroxyapatitis crystals.

The influence of the food diet (drinks, milk and dairy products, cheese, sugar and sweets) and hygiene products for hardness and roughness of tooth enamel have been studied.

a comparison of the hardness of enamel of human teeth and various species of animals (herbivorous, carnivorous and sea) was made. It was established that the physico-mechanical properties of a person’s dental enamel are unique: they occupy a worthy place in the “hardness-elasticity module” of biominerals and other materials, and in terms of mechanical characteristics they surpass the corresponding indicators of the enamel of the teeth of the sharks, the poisonous fangs of cobra-the most dangerous snakes on Earth and the most dangerous snakes on Earth and The enamel of the fangs of rat fangs - some of the tenacious mammals on the planet and hyenas with powerful jaws and incredible cruelty are not inferior in terms of firmness of the enamel.

The initial information from mechanics is given. The parameters of their mechanical properties of the tissues of the auricle and the biomedic silicones for prosthetics, the heart muscle, bile ducts, urogenital tissues, the departments of the gastrointestinal tract of humans and animals are described.

The test results are compared with the hypeurum models of modern mechanics of deformed bodies.

The book is intended for students of dental and medical faculties, residents, graduate students and students of the faculties of postgraduate education of medical universities. It can also be useful to scientists of institutions, teachers of medical and biological physics, normal and pathological physiology.