An appliance for molar distalizatoin with intramandibular stabilization, applied after teeth extraction.

The extraoral appliance which is used for the treatment of patients after teeth extraction causes problems when there is lack of cooperation on the part of the patient. The appliance we present here consists of fabricated rings with brackets for the molars, lingual semicannulas, an outer arch, a lingual arch with a palatine button. The appliance distalizes the teeth by the action of NiTi coils placed lingually and vestibularly between the teeth to be distalized. The palatine button, situated behind the frontal teeth, ensures stability of the apparatus. The practical application of the appliance showed good clinical results, which allows us to recommend it in the practice as a method of choice.

Surgical orthodontic treatment of impacted teeth.

The authors demonstrate their clinical experience in the methodology developed by them for surgical-orthodontic treatment of impacted teeth. The material is based on 34 patients - 21 women and 13 men for the period 1994 - 1997. The patients were treated by the following methodology: after surgical exposure of the impacted tooth a photo-composite devise for tooth-alveolar traction is fixed to the crown part of the tooth by photopolymerization. The methodology is illustrated with a case of a patient treated for an impacted canine tooth.

A method for fabrication of an activator from photopolymer plastic.

The authors propose the fabrication of activators from photopolymerizing plastic. The advantages of this method are reviewed in comparison to the classical technology for fabrication of complicated constructions from hydropolymerizing plastic: Lack of residual monomer. Simplification of technology. Significant shortening of the time necessary to obtain the ready apparatus. Easy adjustment and good adaptation. The method is recommended as a method of choice in the practical fabrication of the activator for clinical application.

[Hemorheological parameters in the prognosis of the risk of fetal retardation in pregnancy with arterial hypertension]. / Khemoreologichni parametri v prognozata na riska ot retardatsiia na ploda pri bremennost s arterialna khipertoniia.

The haemorheological theory creates the notions of the interrelationship between the haemodynamic alterations in the blood flow and the whole-blood viscosity. The whole-blood viscosity is a variable parameter in close relation to the vessel geometry and blood flow rate, the blood plasma viscosity, the volume concentration of the blood cells, mostly of the red blood cells (the haematocrit) as well as to the hydrodynamically effective haemorheological phenomena of the aggregation and deformability of the erythrocytes. In the onward development of pregnancy in Bulgarian women with pre-eclamptic signs an increase of the haematocrit, the haemoglobin concentration and the erythrocyte aggregation were found. These data could be of benefit as reference point of possible risk-conditions for the mother during the pregnancy advance and in the same time of manifestation a retardation and/or stillbirth or neonatal death.