Tooth, Nonvital (Tooth, Devitalized; Tooth, Endodontically-Treated; Tooth, Pulpless)

A tooth from which the dental pulp has been removed or is necrotic. (Boucher, Clinical Dental terminology, 4th ed)


Images

Vertical root fracture

This orthosis is implanted to support the femur after a fracture, but the concentration of stress at its bend increases the possibility that it may break under force.

Stress concentration

The sharp corner at the brick has acted as a stress concentrator within the concrete causing it to crack Geometric discontinuities cause an object to experience a local increase in the intensity of a stress field. Examples of shapes that cause these concentrations are cracks, sharp corners, holes, and changes in the cross-sectional area of the object. High local stresses can cause objects to fail more quickly, so engineers must design the geometry to minimize stress concentrations.

Stress concentration

Internal force lines are denser near the hole

Stress concentration

The supermassive black holes are all that remains of galaxies once all protons decay, but even these giants are not immortal.

Stress concentration

Stress concentration

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Stress concentration

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Stress concentration

Diagnosis and therapies

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Symptoms and diagnosis

Symptoms:

    

More information

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