Effectiveness of a glutaraldehyde formulation in decontamination of dental unit water systems.

Aim: Dental-medical devices may transmit infections caused by bacteria that are usually found in water distribution systems, and which are difficult to treat and control. High bacterial contamination in the water systems of dental units is due to the presence of biofilm inside the pipes. Our study evaluated the efficacy of glutaraldehyde formulated with quarternary ammonium salts (Sanicide T4) examined in a previous study, employing a series of assays to confirm or otherwise the results obtained previously.

[Decontamination of dental unit waterlines using disinfectants and filters].

Bacterial contamination of the dental unit water system can become a health problem for patients, particularly if they are immunodepressed. The present study has had the purpose of evaluating the effectiveness of methods of chemical decontamination using different disinfectants (peracetic acid, hydrogen peroxide, silver salts, chloramine T, glutaraldehyde T4) and methods of physical decontamination using synthetic membranes for the filtration of water. A preliminary removal procedure of the biofilm present in the waterline has been followed in a dental unit prepared on purpose for the research; subsequently different 2-week long maintenance procedures were applied using disinfectants injected by a pump and finally the bacterial contamination of the water flowing from the waterline was evaluated.

A practical technique for conformal simulation in radiation therapy of pelvic tumors.

Purpose: A radiological procedure, based on straightforward conventional methods, was used for a demonstration of pelvic anatomy during simulation to precisely delineate the target volume and increase the probabilities of pelvic tumor control.

Methods And Materials: Between 1990 and 1993, 450 patients with primary pelvic malignancies underwent external radiotherapy by means of photons, 6-10 MeV, with multiple-field techniques. The simulation was carried out immediately following a pelvic organs opacification (POO) by standard methods.

External radiotherapy in the treatment of tonsillar carcinomas. Analysis of 183 cases.

A retrospective analysis of 183 consecutive patients with tonsillar carcinoma observed from 1970 through 1984 and treated by external radiotherapy was carried out. The data were analyzed retrospectively to determine the factors affecting prognosis. Tumor size (T) and lymph node involvement (N) were found to be predominant prognostic factors.

Non-Hodgkin lymphomas presenting with spinal epidural involvement.

Spinal cord compression was the presenting symptom in 9 out of 299 previously undiagnosed non-Hodgkin lymphomas observed between 1972 and 1987. All patients had unfavourable histologic diagnosis and 4 had stage I E, 2 stage II E and 2 were staged as IV; one patient did not undergo a staging procedure. All patients were treated with surgery and radiotherapy, whereas chemotherapy was employed in 3 cases only.