[Detection of vertical root fractures by cone beam CT].

The aim of the study was to assess the feasibility and precision of vertical root fracture diagnostics by cone beam CT (CBCT). Vertical root fractures were simulated in 25 sound teeth extracted because of orthodontic and periodontal reasons and examined by CBCT. The roots were then sectioned in corresponding planes and fractures were assessed microscopically.

Detection of artificially induced vertical root fractures of different widths by cone beam computed tomography in vitro and in vivo.

Aims: To compare the diagnostic accuracy of cone beam computed tomography (CBCT) for the detection of artificially induced vertical root fractures (VRFs) of different widths in vitro and in vivo.

Methodology: Vertical root fractures were induced in 25 extracted nonendodontically treated single-rooted human teeth (maxillary first premolars, maxillary canines and mandibular incisors). Twenty teeth without VRFs served as a control group.

Experimental osteoporosis and its correction.

Osteoporosis was modeled in rats by chronic (6 months) treatment with omeprazole or serotonin, and bone tissue status was studied in experimental hepatic fibrosis and during serotonin treatment under conditions of hepatic fibrosis. Serum levels of calcium, phosphorus, alkaline phosphatase, albumins, and creatinine and bone tissue levels of calcium, phosphorus, magnesium, and iron were measured. Treatment with mesenchymal stem cells over 6 months reduced the severity of osteoporosis.

Synthesis of hydroxydiamines and triamines via reductive cleavage of N-N bond in substituted pyrazolidines.

Aliphatic polyamines, being a versatile class of organic compounds, are widely used in many fields of medicine and organic chemistry. However, the general approach to the synthesis of chiral aliphatic polyamines has been still undeveloped. Here, we describe a new method for the synthesis of chiral trifunctional amino compounds, namely hydroxydiamines and triamines.

[Spiral computer tomography use on the treatment stages of patients with defects and deformations of face bones and soft tissues].

There are discussed possibilities of spiral computer tomography use in cases of defects and deformations of face bones and soft tissues elimination.