Effective Restoration Of Mandibular Defects With Custom-Made Titanium Implants

Medical rehabilitation of patients with defects, deformities of the jaws is an urgent problem in reconstructive maxillofacial surgery. Such defects cause significant dysfunctions of the organs of the maxillofacial region, disfigurement of the soft tissues of the lower face zone. A complex problem of maxillofacial surgery is the development of methods for surgical restoration of the integrity of organs and their function. Currently, various surgical methods and materials are used to restore the defect in the jaw bone tissue [12].

Efficiency justification for stone-concrete face zone of rockfill dams with reinforced concrete face

At present, over 600 dams with a reinforced concrete face are built worldwide; 7 of them are higher than 200 m. However, most of these dams have an inherent disadvantage – face cracking [1, 2, 3], caused by face deformations resulted from the difference in deformation properties of the face and downstream toe. To solve this problem, the authors consider the arrangement of a massive stone-concrete face zone.

Material stone-concrete – selection of composition for concrete face rockfill dams

The properties of the face zone material as a flexible foundation of the face play an extremely important role in the formation of stress-strain state of rockfill dams with reinforced concrete face. Stone-concrete, made by watering the stone backfill with cement-sand mix containing water-reducing agents is proposed to be used as such foundation in the paper. Methods of selecting the composition of the casting mixture and search results of its optimal composition by the method of factor analysis are given in this paper. The properties of stone-concrete are investigated and a dam design technique is developed based on the selection of optimal properties for the face zone of that material.

The valuation of the residual and secondary deformation of the medium face zone in patients with unilateral cleft lip

Background. The treatment of patients with cleft lip and palate is a complicated medical-social problem. The residual and secondary deformations of the nose, upper lip, and dentoalveolar require surgical correction in these patients after undergoing complete reconstruction as a child. Aim. To systematize the degree of severity of the residual secondary deformation of the medium face zone in adult patients after previous surgery. Materials and methods. This scientific work was based on the results of 42 adult patients with unilateral cleft lip after undergoing complete reconstructive surgery as a child. The valuation of residual and secondary deformations of the nose, upper lip, and vestibule was performed in adults aged 25–40 years. The typical residual deformation at these locations was determined and separated into three groups and given a value. Results. We observed that 91% of the patients with unilateral cleft lip had a deformation in the medium face; of these patients, 15% had severe deformation with an absolute indication for surgery. Conclusion. The residual and secondary deformations of the medium face zone were diagnosed in 91% (80.6%–96.7%) of the patients operated using the Miro-Limberg-Obuyhovoi method in the remote period. Moreover, 15% of these deformations had an absolute indication for surgery. The three numbers used in the valuation system of the residual and secondary deformations of the medium face zone in patients with a unilateral cleft lip enable impartial and quick determination of the intensity of one or more deformations of the nose, lip, or vestibule of the mouth.