Search PubMed⌕ Search

Biomedical subjects

E Bertelli

Publications and source records attributed to E Bertelli.

At least 73 records · Page 4Linked to original sources
PubMedDate not supplied

[Biocompatibility and physico-mechanical properties of the new Venezia root canal sealer. In vivo and in vitro test according international standards].

At the moment, in most countries, there are laws in force which impose to the manufacturers well regulated testing in order to investigate and guarantee an acceptable biocompatibility of medical devices before their commercialization. Many international laboratories are committed to the definition of investigation methodologies and to the evaluation of biocompatibility in order to obtain research standards, capable to provide reproducible and comparable objective quantitative data. In every country, technical committees were put together for a standardization of methodological procedures, followed by European and international technical boards which proposed and codified methodologies and investigation approaches. UNI-EN-ISO laws contain all the results and constitute a reference point for any consideration on or evaluation of the biocompatibility of a medical device. Based on these laws, we evaluated the biocompatibility and determined the physical-mechanical characteristics of the new Venezia (Cabon S.p.A.) endodontic ZOE sealer. The Subcutaneous Implant Technique according Safavi et al. (in vivo test, ISO 10993: 1-6 Biological evaluation of medical and dental materials and devices) and Autian test of Emolysis on Rabbit Erythrocytes (in vitro test) allowed us to evaluate a good biocompatibility of the new product. Furthermore, its Setting and Working time, its radiopacity, Solubility and its Flow value completely satisfy the requirements of international standards (ISO/DIS 6876 Dental root Canal Sealing Materials). We can finally deduce that Venezia fulfil the ideal functional properties of an endodontic cements.

Animals↗
PubMedDate not supplied

Cytokeratin 20-expressing M cells in tonsils take up particulate antigen. A site for the delivery of vaccines against oral pathogens?

Quantitative and qualitative control of oral bacterial flora is a major issue in oral pathology and in the prophylaxis against cavities. Recent findings suggest that it is possible to induce local immune responses delivering antigens on palatine tonsils. M cells play an important role in the start of the immune response. These cells are located in the epithelia overlaying mucosal lymphoid follicles and are responsible for the uptake of particulate antigens. The identification of reliable markers for M cell is therefore extremely important. Since it has been reported that tonsillar immunization leads to the secretion of high levels of specific salivary antibody, we undertook a study to identify a marker for tonsillar M cells in order to plan strategies of oral immunization against oral pathogens. We studied cytokeratin 20 expression in rabbit tonsils by immunofluorescence and confocal microscopy. Cytokeratin 20 immunoreactive cells were observed in all samples examined. These cells were identified as M cells as they co-expressed vimentin, a well-known marker of rabbit M cells, and they actively uptook particulate material. It is therefore possible to hypothesize the use of tonsil M cells as a possible site for antigen delivery of particle-based vaccines against oral pathogens.

Animals↗
PubMedDate not supplied

[Connections between the phrenic arteries and various visceral arteries].

During an angiographic research carried out over more than 1100 cases, some connections between the phrenic arteries and the arteries of the hepatic, superior mesenteric and renal districts were observed. The AA. point out the presence of these connections even of thin calibre, their right prevalence (71%), and their uncertain embryologic origin.

Adolescent↗
PubMedDate not supplied

[The origin of the arteria sigmoidea ima].

The authors report the results of their observations on the lowest sigmoid artery, carried out on 92 anatomical specimens coming from surgical operations on the sigmoid and rectum. The specimens were injected and radiographed immediately after their removal . The observations were often preceded by pre-operative angiographies performed for diagnostic reasons. The AA. document all the variational patterns of this artery. They confirm the poor functional value of this artery more known by the old surgeons than by the anatomists.

Angiography↗
PubMedDate not supplied

[Laser therapy: clinical aspects of analgesic effect in dentistry].

This work shows the results obtained verifying the analgesic ability of the Laser therapy in clinical practice. We are now locating new possibilities of treatment from therapy records taken by previous researchers. We are thankful for the efficient therapy of the semi conductor Ga As Laser and the possibility that we have through the use of such an instrument to reduce the supply of the anti inflammatory medicines in patients that experience pain.

Adolescent↗
PubMedDate not supplied

[The termination of the superior hemorrhoidal artery. An anatomicoradiological study].

The author report the observations carried out on the distal part of the hemorrhoidal artery, obtained with a research on the vascularization of the large intestine, studied by the angiographic method and injection of the c.m. in the anatomical specimen immediately after surgical extirpation. The study was based on 92 anatomical specimens and reveals a variability of the terminal arterial distribution which can be summarized in few more frequent models, but cannot be given an absolute rule.

Angiography↗
PubMedDate not supplied

[Mitomycin C: current status of knowledge and use in laryngeal tumors].

The Mitomycin are a family of antibiotics useful in the treatment of breast, lung, stomach, colorectal and other solid tumours. One member of the family, MC (Mitomycin C) is examined and the present biochemical, physiological, microbiological, pharmacological and clinical knowledge of the drug and its use in laryngeal tumours is reviewed.

Clinical Trials as Topic↗