[External cervical tooth root resorption].

External cervical tooth root resorption is one of the most aggressive types of pathological resorption. Due to the uncontrolled growth of resorptive tissue, irreversible loss of dentin and cement occurs. To date, there is no common position regarding the etiological factor and pathogenesis of invasive cervical resorption.

[Root canals dentinal wall structure after photodynamic exposure].

The aim of the study was to assess root canal dentinal walls structure after photodynamic exposure with the use of 0.5% photoditazine. A root canal dentin of 46 single root intact teeth removed for orthodontic indications was examined by scanning electron microscope JEOL JSM-6510 (Japan).

[Laser photocoagulation in treatment of plexiform neurofibromas in maxilla-facial area].

The incidence of plexiform neurofibromas (PN) is 1:2500-3000, the disease affects maxilla-facial area in 31% of cases. The current paper describes results of treatment of 23 patients as well as preliminary data on using laser coagulation as treatment option for PN, namely on preoperative stage of treatment.

[Induced variability in Acremonium chrysogenum, a producer of neutral-alkaline proteases and peptidases].

Lethal and mutagenic effects of N-nitrosomethyl biuret on the organism producing a complex of proteolytic enzymes i. e. Acremonium chrysogenum were studied.

[Clinical and diagnostic characteristics of the early forms of stomach cancer].

Clinical and diagnostic problems of early stomach cancer were considered for 157 patients with diagnosis confirmed after operation. Gastroenterological diseases were not mentioned in the past medical history of 22.9% of the patients only.