Deformation behavior of root dentin under Sjögren's syndrome

Microstructure and deformation behavior under uniaxial compression of human root dentin cut from injured premolars (Sjögren's syndrome) are studied. Optical metallography in transmission light is the technique for microstructure examination. There is sclerosis dentin near the root channel of a Sjögren's tooth. Root dentin of injured teeth is high elastic and plastic hard tissue, whose mechanical properties, including fracture mechanism, are close to the normal root dentin. This may be explained by the fact that samples for tests contain small quantity of the sclerosis tissue. The roots of a Sjögren's teeth can be used as a base for standing of implants after endodontic treatment.