[Single tooth loss and osseointegrated implants. Replacement of a maxillary incisor].

The loss of a maxillary incisor is traditionally treated with a three-unit bridge. The progress made in dental implantology since the demonstration of osseointegration by Brånemark and al. allows the overall replacement of the missing tooth.

[The implant denture in the laboratory].

The authors analyzed the numerous devices and prosthetic kits currently available for implant prosthodontics. Existing systems can be classified into two fundamentally different categories: the gold ring cylinder (or its equivalent in resin for casting) and the prosthetic abutment core or post concept. The former is based on connection of two nearly flat, horizontal surfaces by means of a screw, which avoids problems of parallelism; the latter can be likened to insertion of one part into another, like a crown that slides along the vertical axis of an abutment, with connection being obtained by cementation and/or screwing.

Comparison between the properties of the vagal and splanchnic glucoreceptors of the small intestine. Involvement in insulin release.

It was recently well established that the vagal intestinal glucoreceptors are involved in insulin release. In this work we demonstrate that the splanchnic glucoreceptors play a unique role in insulin release: their activation induces a decrease, like strong mechanical stimulation. The physiological meaning of this effect is not clear, it may be a non-physiological response, because high glucose concentration is abnormal in the jejuno-ileal lumen.