No 3 (2005)

The article contains the results of a histologic study, the aim of which was to determine bone tissue response to implantation of bioresorbable materials (96/4 PLDLA, PLLA, PLLA/PGA, 70/30 PLDLA) into experimental bone defects in the shaft of femur. The subjects (40 linea Wistar rats) were followed up within 1, 3, 6, and 10 months. The results show that implantation of these materials does not suppress reparative osteogenesis in bone defects. The observations suggest that these materials have certain tendency towards osteointegration.

The subjects of the study were 9 dogs. Experimental "moderate caries" cavities were formed and than filled with Opti-BondSolo KerrUSA with the compomeric filling material Esterfill Ca\F (group I), the adhesive system Esterfill-photo with the same material (group II), and Esterfill Ca\F according to the directions given by the manufacturer -jointstock company DIAS (group III). The animals were taken out of the experiment 1, 3, and 6 months later; the teeth were studied by means of nondestructive acoustic microscopy using a new model of an acoustic microscope. The study revealed substantial heterogeneity of the material, and showed the distributions of glass particles in the polymeric matrix of Esterfill Ca\F. The ultrasound speed in this material was substantially lower than in the enamel and dentine. The defects of its adhesion to the hard tissue of the filled teeth could be caused by difference in mechanical strength, which was evidenced by the ultrasound speeds in the samples. The results of the study allow grounded interpretation of the acoustic images of filling materials and their adhesion properties towards hard tooth tissues.

The aim of the study was to reveal periods of immune tension during orthodontic treatment. The subjects (102 children with dental and jaw anomalies and deformations) were divided into three groups: group I (control) - 30 children without dental appliance treatment; group II - 35 children receiving treatment with removable therapeutic orthodontic appliances; group III - 37 children treated with brackets. The study found that the whole period of active appliance treatment was characterized by immune disbalance, which was particularly noticeable one month, five months after the beginning of treatment, and during its final stage (i.e. IS months after the fixation of brackets). The results suggest that these periods should be considered "critical", and require immunocorrective therapy and caries-preventive measures.

The authors studied the efficacy ofintraseptal and infrftration anesthesia with citocartin-100 for fortooth replacement using ceramic veneer; hemodynamic parameters were analyzed. The results demonstrate high efficacy ofintraseptal anesthesia with citocartin-100, due to the pharmaceutical itself and the way of its administration