[The use of intraosseous appliances considering the anatomical features of the hard palate]. / Ispol'zovanie vnutrikostnykh apparatov s uchetom anatomicheskikh osobennostei tverdogo neba.

OBJECTIVE: The aim of the study. To improve the effectiveness of patients' treatment with narrow upper jaw by improving the stability of intraosseous devices. MATERIALS AND METHODS: 40 patients with the narrow upper jaw, from 12 to 40 years old, were treated. 50 self-drilling orthodontic miniscrews of each manufacturer, i.e. «BioRay¼, Taiwan, «Turbo¼, Russia, a total of 100 items, were inserted into a palate. RESULTS: The greatest thickness of the cortical bone relative to the sagittal plane was observed at a distance of 6 mm from the incisor canal, which averages 6.32 mm. Relative to the transversal plane, the greatest bone thickness was observed 3 mm laterally from the median palatine suture and averages 7.62 mm. The smallest thickness of the mucous membrane of the hard palate is noted 6 mm distal from the incisor canal and 3 mm laterally from the palatine suture is on average 4.56 mm. CONCLUSION: The protocol for determining the individual position of the miniscrew for each patient, taking into account all his anatomical features, is a necessary tool for clinical success.

[Assessment of dental arches expansion using ligature and passive self-ligating braces in combination with Pitts broad arches and early elastics]. / Otsenka rasshireniya zuboal'veolyarnykh dug u patsientov pri ispol'zovanii ligaturnykh i passivnykh samoligiruyushchikh breket-sistem v sochetanii s dugami Pittsa shirokoi formy i rannei elastichnoi tyagi.

THE AIM OF THE STUDY: Was to analyze the effectiveness of the use of Pitts Broad and early elastics in the treatment of patients with narrowing and deformation in dentition. MATERIALS AND METHODS: The results of orthodontic treatment of 46 adult patients with narrowing and deformation in dentition are presented. Patients were separated in 2 groups, depending on the algorithm of treatment: group 1 - using the braces of passive self-ligation, Pitts Broad and early short elastics; group 2 - using ligature braces and archwires Orthos. RESULTS: Biometric analysis of the diagnostic models of the 1st group after treatment showed a significant increase in the area of the premolars on the upper (between premolars - 39.8±0.4 mm, between molars - 48.3±0.5 mm) and lower (between premolars - 37.1±0.5 mm, between molars - 46.3±0.6 mm) jaws compared to the data before treatment. Biometric analysis of the diagnostic models of the 2d group showed that expansion in the area of the molars was achieved in a much smaller volume in the upper and lower jaws, compared with the 1st group (upper jaw: between premolars - 35.7±0.4 mm, between molars - 43.5±0.5 mm; lower jaw: between premolars - 33.2±0.3 mm, between molars - 42.3±0.5 mm). CONCLUSION: The passive self-ligation system in combination with protocol of Pitts Broad already contributes the expansion of dentition in aesthetically significant areas (distal regions) in the early stages of treatment. Using of early light elastics provides an early control of the lateral tooth torque, which allows achieving a harmonious and wide smile at the end of treatment.

[The experimental study of a Russian orthodontic mini-screw]. / Eksperimental'noe issledovanie otechestvennogo ortodonticheskogo minivinta.

BACKGROUND: The aim of this research is the experimental study measuring stability of the orthodontic miniscrews «Turbo¼ designed in Russia in comparison with its foreign analogues, namely, «Vector Tas¼ (USA) and «BioRay¼ (Taiwan). MATERIAL AND METHODS: Four self-drilling orthodontic miniscrews of each manufacturer, i.e. «Vector Tas¼, USA, (10-mm length, 2-mm diameter), «BioRay¼, Taiwan, (10-mm length, 2-mm diameter), «Turbo¼, Russia, (9-mm length, 2-mm diameter), a total of 12 items, were inserted into native pig mandible sample. Their stability was estimated by torques using a dynamometer (Zahoransky AG, Germany) and «Periotest¼ device («Periotest M¼, Germany). This experiment was conducted in native pig mandible sample immediately after the screws' placement and in 7 days after loading at an angle 70°. RESULTS: After application of a load, the decreased torque values and increased Periotest values were registered in all orthodontic miniscrews. CONCLUSION: Orthodontic miniscrews «Turbo¼ designed in Russia are slightly inferior to «VectorTas¼ miniscrews and superior to «BioRay¼ miniscrews in primary stability and stability after 7 days under loading.

[Algorithm for treatment of patients with class II malocclusion rejecting orthognathic surgery]. / Algoritm lecheniya patsientov s nizhnei retrognatiei, otkazavshikhsya ot kostno-rekonstruktivnoi operatsii.

The aim of this study is to develop algorithms for the treatment of patients with class II malocclusion and incisor protrusion using the combination of bracket system, functional fixed telescopic appliance (FFTA) and skeletal anchorage, which allows to achieve effective dentoalveolar compensation of skeletal forms of class II malocclusion. MATERIALS AND METHODS: Orthodontic treatment of 60 patients with class II malocclusion at the age of 18 to 44 years, using the bracket system, FFTA and orthodontic miniscrews was performed. In order to assess the results of treatment, cone-beam computed tomography were obtained at the beginning and at the end of treatment. RESULTS: As a result of the treatment normalization of lower jaw position, dental position and occlusion were achieved, the lower incisors protrusion was eliminated and the facial profile was improved, reliably confirmed by lateral cephalograms. CONCLUSION: The proposed treatment algorithm proved to be effective for stable correction of skeletal class II malocclusion in patients rejecting orthognathic surgery.