Publications by authors named "K Perkowski"
Background: Diseases in humans caused by amphizoic amoebae that can result in visual impairment and even blindness, have recently been identified more frequently worldwide. Etiologically complex incidents of keratitis, including those connected with strains detected in Poland, were evaluated in this study.
Methods: Corneal samples from cases resistant to antimicrobial therapy assessed for epidemiological, microbiological and parasitological aspects were investigated by phase-contrast microscope, slit lamp and by confocal microscopy.
Objective: The aim of the study was to assess the diachronicity of factors that produce malocclusion from the 18th century to the present.
Materials: A total of 74 adult individuals Radom (Poland) of both sexes were examined (males: 46, females: 28).
Methods: The skulls were grouped according to the type of malocclusion found: i) anterio-posterior (skeletal Class I/II/III), ii) transverse (cross bite/scissor bite), and iii) vertical (open bite/deep bite).
Background: The aim of the study was to assess the thickness of the soft tissue facial profile (STFP) in relation to the skeletal malocclusion, age and gender.
Methods: All patients, aged 7-35 years, who were seeking orthodontic treatment at the Department of Orthodontics, Medical University of Warsaw between 2019 and 22 were included in the study. All patients had lateral head radiographs taken before the treatment.
Article Synopsis
- Oligodontia, a condition where a person is missing several teeth, can occur on its own or as part of a syndrome linked to other issues affecting the skin, hair, or nails.
- The study examined hair characteristics of 25 orthodontic patients aged 6 to 24 who were diagnosed with oligodontia but showed few ectodermal symptoms.
- Results showed a significant prevalence of hair disorders in 68% of subjects, including various forms of hair loss and texture abnormalities, suggesting that hair examination methods like trichoscopy and trichogram could help distinguish between types of oligodontia.
Thermal decomposition of NHBH and Li(BHNHBHNHBH) was investigated at temperatures up to 1000 °C under various conditions with an inert atmosphere. It was found that complete dehydrogenation of ammonia borane towards amorphous boron nitride (a-BN) occurs at 850 °C when using monel reactors or at 1000 °C with the hot isostatic pressing method (HIP), which is significantly lower than was earlier reported. Li(BHNHBHNHBH) was found to decompose towards hexagonal boron nitride (h-BN) at 1000 °C with the HIP method but at 850 °C in monel reactors towards a mixture of a-BN and h-BN.
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