Ultrastructural evidence of a Papova-type viral morphogenesis phenomenon in infiltrating cells from juvenile periodontal lesions. A case report.

Electron optic study of inflammation infiltrating cells in juvenile periodontopathic tissue showed the presence of "nuclear-body"-type structures and of nuclear and cytoplasmic virus-like inclusions, which predominated in cells presenting degenerative modifications commonly encountered in malignant cells. Their significance is discussed.

[Parodonto-prophylactic restoration of occluding stops by dental bridges].

The authors have studied data from the specialized literature and evaluated their personal experience for identifying the positive and the negative aspects of current methods for the restoration of occluding stops. The study has evidenced that the method employing a median articulatory device and the galvanic model of the antagonist teeth can be used for the biological integration at a higher level of efficiency of dental bridges which are intended to restore occluding stops. Superior functional parameters are achieved.

[Structural changes in bronze (Gaudent) and Palliag alloys following corrosion effects].

Due to socio-economic considerations the use of two new types of non-oxydable alloys satisfactory for practical necessities should be examined more closely with a view to acquire a better knowledge of their behaviour. The present study investigates the behaviour of Gaudent and Palliag alloys under the effects of corroding agents. An analysis with an electronic micro-probe of the samples of ally exposed to corroding effects has evidenced various reactions in the buccal cavity and in the environment.