[The results of computer simulation of the dentinal fluid hydrodynamics in the open crown dentinal tubule].

Objective: To study the hydrodynamics of the dentinal fluid along the dentinal tubule in the event of its opening as a result of mechanical and acid treatment of the dental crown dentin. Material and methods: A licensed version of the ANSYS / FLOTRAN computer program was used, which is a software tool for solving various problems of hydrodynamics, including laminar and turbulent flow of an incompressible or compressible fluid.

Results: The results of computer simulation showed that 1.

[Comparative assessment of the human blood plasma impact on the properties of various adhesive systems].

Objective: To assess the degree of influence of human blood plasma simulating dentinal fluid on the composite resin adhesion to dental hard tissues.

Material And Methods: The strength of the adhesive bond between the composite material and dental hard tissues was studied using a shear test machine Zwick Roell Z 010 («Zwick», Germany) on extracted human teeth. XP Bond one-component adhesive system and XENOV self-etching adhesive system (DENTSPLY, Germany), high-definition micrometric restoration material Esthet X HD (DENTSPLY, Germany), as well as centrifuged blood plasma were used.

[Method of root canal retreatment using computer simulation].

The paper describes a method of root canal retreatment that enables by means of CT data, laser surface scanning of teeth and a number of software to create plastic templates making possible successful retreatment with minimal risk of complications. The effectiveness of the method was evaluated in vitro on 10 extracted teeth. Application of the method in clinical practice enables the highest degree of accuracy and security of the procedure.