Revue francaise d'endodontie : publication officielle de la Societe francaise d'endodontie最新文献

The "smear layer" is composed of debris that cover and insert into dentinal tubules. It is not really known if this form of debris may harbon viable bacterias or does form a barrier that enhances endodontic fillings by lining or plugging the tubules. The purpose of this study is to determine the role of the smear layer in leakage by using two groups of teeth in which the smear layer was removed of the root canals, in the first group and left into the roots in the second group. Some samples were beveled and all teeth were retrofilled after Root Canal Preparation, and then filled with India Ink. After examination of leakage under various conditions, it has been found a correlation between leakage and removal of smear layer.

The biocompatibility of glass ionomer cement with silver and titanium ions is studied in vivo on dog's canine. Class V cavities, side by side the pulp, are prepared and Ketak Silver cement is placed inside. Variation of pulp pressure are recorded before and after the cement's applying, after which the crowns are cut and broken at the filling level, the different components part diffusion through the dentin are placed in prominent position by means of a microanalysis and a cartography of the sample is obtained by colorimetric picture. The pulp's haemodynamic responses to Ketak Silver are in harmony with the metallic ions diffusion and specially with silver.

Some aching troubles encountered in heart disease can affect the jaw and patients can visit a dentist for this reason. The severity of this affection needs a quick diagnostic for preserving the patient's life.

The time taken to achieve the sterilization of K files impregnated in a Bacillus subtilis culture was evaluated, placing the files in a glass bead sterilizer. The minimum time needed was 20 seconds at 240 degrees C and the previous cleaning of the file with a sterile wipe impregnated by alcohol reduced this time to 15 seconds.

Evaluation of the biocompatibility of a crown reconstruction material in vivo on human teeth by histologic observation of pulpal reactions is a long lasting and expensive procedure. Before to start it, a first examination can be done by testing the material on cell cultures. If the used culture cells contain antibiotics, it is necessary to combine these tests with a bacteriologic examination of the tested material. Two calcium hydroxide containing materials for dentin-pulp capping, were submitted to cytotoxicity tests using human pulpal fibroblasts cultures. The cytotoxicity of one over the two materials could be related to its lability and bacterial contamination.

Pain can be something hazy and the way it occurs can make the practitioner doubt. Some toothaches are treated with root canal therapy or removal of the tooth (or teeth) when be etiology is myofacial pain dysfunction (MPD). This implies the need of a proper differential diagnosis between myofacial pain dysfunction and root canal pathology.

Dental infections are able to produce ocular diseases by direct metastatic reflex or allergic pathways. Generally, these diseases quickly heal after a symptomatic local treatment with antibiotics and anti-inflammatory medications associated to an etiologic therapy in order to eliminate the dental infection and the allergic hypersensitivity. The dental surgeon has a key position by promptly establishing a proper diagnosis and an efficient local treatment: the prognosis depends on these factors.

The pulpal pain tract can be understood while learning the sensory nerve supply of the dental pulp and the trigeminal system. Some hypothesis on the pain genesis are related to the originality of the pulp-dentin complex.

The prevalence of "C" shaped root canals in the second mandibular molars is relatively low, but diagnosis and treatment of these canals are sometimes difficult. Through clinical cases, the authors emphasize on the importance of preoperative X-rays and describe convenient preparation techniques. Some "C" shaped canals are difficult to interpretate because of the thickness of bone trabeculae, and a "C" shaped canal must be suspected when the roots are fuse and/or very close each other.