Introduction. Dental caries is considered to be a modern civilization disease;however, the state of oral health negatively influences psychological and sociological relations in children which leads to feelings of discomfort from early age. Objective. The aim of study was evaluation of the association between incidence of dental caries (d 3 ft index) in preschool children from urban and rural areas, and determining the relationship between dental caries intensity and hygienic habits. Materials and Method. 844 children aged 3-6 years from the city and the countryside were examined. The survey was conducted among parents/care givers regarding dental care of children. With parents' consent, the children had a dental examination. Results. The incidence of caries was recorded at the level of 52.61%, with an average value of 4.31 on the d 3 ft index; however, for the children from the urban area this ratio amounted to 4.15, and in the countryside it reached the value of 4.7. A correlation was found between age and area of residence of the children and various components of hygienic behavior model. Conclusions. More than a half of the children had dental caries in combination with a high frequency of unsatisfactory hygiene needs. There is a relationship between oral hygiene habits and age of the children, depending on the place of residence.
Dental composites reinforced with glass fibers have a low tensile modulus and relatively low fatigue resistance. The aim of the study was to analyze the fatigue properties of a dental composite reinforced with polyaramide fibers under the influence of a cyclic, vertical load. For this purpose, we designed a thermoformable template, corresponding to the construction of adhesive bridges in the side section of the jaw. Fifty-four composite samples were made for the study. They were divided into three groups—control (K) and two experimental groups (R1 and R2). The experimental samples were subjected to cyclic fatigue using 75 N load. The number of cycles was 4690 and 20,100. The study used a three-point bending test. Statistical analysis showed a change in elasticity in groups related to the number of load cycles. The study showed that the samples from the control group required the greatest force to break in relation to those subjected to the work cycles. The maximum force in control (K) group was 738.1 N, R1—487.8 N, and R2—451.4 N. The determined algorithm showed a change in deflection associated with the increase of force value. The study did not show any relationship between the type of sample fracture and the number of load cycles.
Opis przypadku / Case report Leczenie ortodontycznochirurgiczne pacjenta z transmigracją kła żuchwy.
Opis przypadkuComplex orthodontic and surgical treatment of a patient with a transmigrated mandibular canine.
Analiza rysów twarzy i badanie profilu jest jednym z podstawowych narzędzi diagnostycznych w praktyce ortodontycznej. Cel. W pracy analizowano zależność kąta wypukłości profilu G-Sn-Pg od zmian wartości kąta ANB u osób nieleczonych ortodontycznie z I oraz II klasą szkieletową. Materiały i metody. Materiał stanowiły fotografie profilu wykonane przed leczeniem ortodontycznym oraz teleradiogramy boczne głowy. Do badania wyselekcjonowano osoby o neutralnym kącie międzyszczękowym oraz indeksie. Badanych podzielono na dwie grupy. Grupę A stanowiło 25 osób w wieku od 8 do 18 lat z II klasą szkieletową
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