[The effect of long-term water storage on some mechanical properties of denture base material]. / A hosszantartó vizes tárolás hatása a protézis alaplemezanyag egyes mechanikai tulajdonságaira.

Flexural strength and Hounsfield impact resistance of a denture base material were yearly tested in a time scale of 5 years. Impact energy for fracture was continuously stable during the 5-year-long storage in water. Forces caused fracture in wet circumstances were between 60-80 N during the observation period. A significantly (p < 0.001) higher forces were measured at fractures for dry specimens in comparison to the wet polymer material in some years.

[Bonding strength and fracture resistance of artificial teeth in dental prostheses]. / Protézismüfogak szakítószilárdsága.

Debonding of plastic teeth from its denture base has been frequently experienced in our prosthetic practice. Three of nine products investigated have fulfilled the requirements for bonding according to ISO test 3336. Loading forces necessary to produce fractures varied between 170-810 N within the tooth and 80-230 N at the tooth-denture base interface. Comparative significances were noted for the mean breaking force against fracture and debonding when comparing the resistance of "Acry Rock" to the other eight materials tested. Maximizing the extension of the polymerization surface through a larger surface area of individual teeth seemed to be a significant factor in the determination of the debonding force necessary to produce fracturing.

[The immune status of patients with irradiated testicular neoplasms]. / Untersuchungen über den Immunstatus bei bestrahlten Hodentumorpatienten.

The authors present the results of investigations of the immune reactivity of 72 patients irradiated for testicle tumors. The responses to tuberculin and DNCB (2.4-dinitrochlorobenzol) were examined before the treatment, within twelve months after radiotherapy and three years after radiotherapy and when metastases appeared. After radiotherapy, the number of positive responses was slightly decreased in both examination methods, but the difference was in no case significant. Patients with metastases showed a significantly decreased response to DNCB compared to the results obtained before radiotherapy. 5.6% of the patients had suffered from herpes zoster. The incidence of other infective diseases was not increased. The conclusion is drawn that the moderate immunosuppression caused by radiotherapy does not exert any influence on the further way of living of patients with testicle tumors.

Histological and autoradiographic changes in locally irradiated lymph nodes (an experimental study on rabbits).

The authors studied the local effect of 3000 Rxl X-ray irradiation on the popliteal lymph nodes of rabbits. Beside the morpho-histological description autoradiography was performed after injection of H3-thymidine in the afferent lymphatic of the irradiated knee node. The main finding is the appearance of newly-formed germinal centers between the 6-10. days after irradiation.

[Cellular immune response and concentrations of serum immunoglobulins in patients with Hodgkin's disease (author's transl)]. / Die zellgebundene Immunreaktivität und die Serumkonzentrationen der Immunglobuline bei Hodgkin-Patienten.

The cellular immune response was explored by us with the help of tuberculin and DNCB reactions in 73 cases of Hodgkin's disease. Serum immunoglobulins were simultaneously determined. Tuberculin and DNCB reactions had significantly been decreased before treatment. A significant augmentation of the IgA is remarkable in tuberculin and DNCB positive groups. The positivity of the cutaneous tests is only temporarily lowered by radiation therapy, the difference being not significant, while IgM values in patients who had undergone radiation therapy are remaining at a lower level. Patients in remission revealed a positivity in tests that was approximating the values before treatment. Lower values were observed in all the three groups of immunoglobulins; the decrease of the IgM-values was significant. In case of a relapse, a significant decrease of positivity developed, accompanied by significantly increased values of IgA in tuberculin and DNCB negative groups. Only insignificantly positive values of the cutaneous tests were seen in the course of cytostatic treatment, and the values of the IgM were significantly decreased.