[Prosthetic treatment and needs for this treatment in adults aged 35-44 years in the province of Bialystok]. / Leczenie protetyczne oraz potrzeby w tym zakresie u doroslych w wieku 35-44 lat w województwie Bialostockim.

In randomly selected 180 subjects of either sex aged 35-44 years from a city, a town and a village in the Province of Bialystok (30 subjects in each group) the state of prosthetic management and the needs for prosthetic treatment were analysed. Removable prostheses were worn by 23.3% of the subjects. Over one-fourth of the used partial removable prostheses required exchange. In this group of 180 subjects the need for prosthetic management included 168 removable prostheses (including 3 complete ones), 63 bridges and 277 crowns. These data indicate an urgent need for increasing the range of prosthetic treatment for the population of this province.

[The condition of oral mucosa and periodontium in drug addicts]. / Stan przyzebia i blony sluzowej jamy ustnej u narkomanów.

The condition of the parodontium and oral hygiene were assessed in two 29-case groups of drug addicts before withdrawal treatment (hospital) and after it (in MONAR centre). The control group comprised 29 non-addicts. The PI index of Russel and OHI-S index were calculated. It was found that the mean value of PI and OHI-S was significantly greater before withdrawal treatment than after it, and in relation to controls. The values of both indices increased significantly with the duration of addiction. The authors concluded that drug-addiction through psychic deterioration leads to abandoning of oral hygiene which is the main cause of paradontal changes.

[The condition of teeth and the need for teeth treatment in drug addicts]. / Stan uzebienia i potrzeby lecznicze narkomanów.

The condition of teeth was studied in 30 drug addicts aged 21-34 years (drug addiction duration 3-16 years) comparing the results with those obtained in a similar group of 30 age-matched subjects without drug addiction. The needs for stomatological treatment were determined also. It was found that drug addicts had twice the number of teeth with active caries and missing teeth, and four times less filled teeth as compared with controls. Most drug addicts had lost 45-100% chewing ability, and loss of teeth included all anatomical groups. The mean number of teeth requiring treatment per one addict was 8, and 2.8 teeth required removal. Only 3 addicts were not in need of prosthetic treatment, the remaining ones (90%) should have been given permanent of removable replacements (including complete denture). Drug addiction was found to produce intensification of caries and mutilation of the stomatognathic system.

[Methods of medium discretization and characterization of the elastic features of hard dental tissues]. / Sposoby dyskretyzacji osrodka i charakteryzowania cech sprezystych tkanek twardych zeba.

The method of characterization of the elastic features of tooth tissues and certain materials for filling of tooth defects is described. The method is useful in the calculation of tensions. Principles of discretization of the surfaces of cross-sections of teeth are discussed, and quantitative examples are included explaining the mode of finding of extreme values of tensions.

[Application of the finite element method in analysis of the tensions state in hard tissues of the teeth]. / Zastosowanie metody elementów skonczonych do analizy stanu naprezen w tkankach twardych zeba.

The principles of the finite element method (FEM) that is useful in analysis of the tensions state in hard tissues of a healthy and a filled tooth have been presented in the paper. Both algorithms and assumptions of FEM have been given that enables the investigators concerned to utilize the method individually.