No 5 (2006)

The main physicomechanical and operational properties of MedSil, a new Russian A-silicone impression material, and two foreign analogues produced by Germany and Great Britain, were compared. The following parameters were studied: final hardness Shore A; breaking strength; residual elongation; breaking strength value at 10% and 50% elon-gation; 24-hour shrinkage; compression shrinkage and operational properties by M. A. Muradov method. The study showed that MedSil, a new Russian material for two-layer impressions, meets contemporary requirements for impression materials, and in not inferior to the studied foreign analogues according to the main operational as well as elastic and strength characteristics

Data obtained by the authors demonstrate that the priority factor of caries occurrence in children is incorrect feeding including short lactation period as well as consumption of sweet formulae and carbohydrate-containing products between meals. Study of microelement composition demonstrated serious changes, possibly due to unbalanced feeding. Normalization of feeding alone is not enough to reestablish microelemental balance; the use of pharmaceuticals for additional cor-rection of mineral exchange disturbances is necessary. One of caries-predisposing factors is insufficient hard dental tissue mineralization due to incorrect feeding. Caries is a multifactor pathological process. Many factors are controllable; their action can be either eliminated or inhibited. This greatly depends on the awareness of mothers-to-be, as well as on the levels of sanitary knowledge on caries prevention.

The author compares the clinical picture of odontogenic osteomyelitis of the jaws in 146 patients who were observed between 1965 and 1970, and 64 patients who were observed between 1999 and 2005. The diagnosis is difficult. Classical symptoms are rare. Presently, latent forms of the disease are found; acute and subacute stages of osteomyelitis are often misdiagnosed, especially in patients receiving antibiotics, and adequate treat- ment begins after the chronization of the process. Presently, progressive mandibular osteomyelitis, accompanied by frequent relapses, the absence of the demarcation of bone fusion foci, and advancement to new areas, has began to occur