[The effectiveness of dentoalveolar anomalies treatment in children during early mixed dentition period].

Aim: To analyze the effectiveness of orthodontic treatment in 7-9 years old children, dental status in children residents of Moscow was compared with 15-17 years adolescents with completed bite formation.

Material And Methods: The adolescents were divided into two groups: those who received orthodontic treatment during the mixed dentition period and those who did not receive the treatment. A WHO survey chart was used to assess the dental status of children (WHO, 2013) with additional section 'Dentoalveolar anomalies'.

[Biomechanics of implant retained fixed prosthesis in patient with edentulous upper jaw].

The purpose of the study was to study the stress-strain state of bone tissue and a permanent prosthesis on implants installed in the frontal part of the upper jaw. The 150N load was applied to the frontal and 250N to the side of the non-removable prosthesis on six or four implants, including zygomatic and 'All-On-Four' technology. The values of stresses in bone tissue, implants and prosthesis are obtained, which show a large margin of strength in structural materials.