Revue d'odonto-stomatologie最新文献

The objectives of tooth preparation for porcelain crowns are emphasized in this article. The forms of contour described by Gonon, LE Huche, Poggioli and Leibowitch are reviewed in the first part. In the second part, the profile of the cervical limits and their evolution are described, according to the materials used. The importance of the marginal fit, in relation to microleakage and esthetics, is related in the third part.

In classifying by numbers their fundamental movements, one can expect, on the basis of certain principles, to give with precision the kinematic proprieties of a particular attachment. This method to describe prefabricated attachment, is concise, clear, explicit and comprehensive internationalLy. It facilitates the choice of attachment and allows further mutual understanding between practionner and technicians.

To change a maxillary lateral incisor into a central incisor by using a ceramo-metallic crown, it is required to schedule a rational plan of treatment. All the different pre-prosthetic (orthodontic, periodontic, and endodontic) and prosthetic steps are described and justified. In order to achieve a compromise between esthetic and a stable periodontium the mesial profile of emergence of the ceramic should be conceived to prevent any overcontour.

The purpose of constructing prosthesis to restore post-surgical deformities of the jaws and the face is to enable such patients to cope better with the difficult process of rehabilitation. Patients with post-surgical maxillofacial defects are presented in this article to illustrate how prosthodontic restoration could improve their functional or cosmetic disability.

An under vacuum processing is able to procure a high mechanical resistance surface coating of few microns on rotating instruments. The results show an increase of the life expectancy of the instruments and an improvement of their mechanical qualities and their resistance to corrosion.

To realise a good child's dentistry, an excellent analgesia is primordial. Local anaesthesia is most useful for reliable and complete dental care on one tooth during one single appointment. But the young patient is afraid by the "ting", making an association with disagreeable or sore souvenirs as a vaccination. First contact with the dentist is the very important; from psychological point of view, situation has to be dedramatized; from technical point of view, anaesthesia has to be not painful and efficacious. In pedodontics, the best technical procedure is an infiltration anaesthesia.

When large restorations are necessary, self screw-cutting dentinal pits are very useful auxiliaries. The main risks encountered during their utilization are: --perforation through periodontium--pulpal wound--dentinal cracks--weakness of mechanical properties of restorative material--corrosion--breakdown of the drill--pulpal warning up--unesthetical front restorations. The way to prevent those difficulties are: --precise clinical and radiological examinations--insertion point--direction--number--composition--choice of pits.

Accurate diagnosis of pulpal and periodontal pathology in children is an intricate question, in fact of mixed dentures and physiological and symptomatological dissimilarity between permanent and deciduous teeth. Some figures of most frequently encountered tissue modifications of deciduous teeth are proposed in order to be considered in the way of diagnosis and therapeutics in pedodontics.

Dark field microscopy and phase contrast microscopy allow subgingival microbial plaque examination to differentiate healthy state and pathogenic stages of periodontal disease. These microbial technics are appropriate to inform the patients about the bacterial etiology of their periodontitis and motivate them for a better oral hygiene.

Aspergillus sinusitis are not uncommon. A multiplicity of etiologic factors are involved since any foreign body introduced in the sinus can be the starting point to an aspergillus cloud. The endodontic origin is difficult to establish. The authors will review this topic through a case report.