Autogenous dental transplants: description of a clinical case.

The dental transplant was already in use more than 2,000 years ago, reaching a peak in the Middle Ages, but it was only after the 1950s that this subject appeared in the scientific literature. This article describes the case of a young woman whose mandibular left second and right first molars had to be extracted and were replaced using the maxillary third molars. The positive clinical and radiographic results over a 5-year period encourage the use of this technique.

[Some specific aspects of dentistry's professional responsibility: tooth extraction surgery, prosthodontics, implantology and HIV infection]. / Su alcuni specifici ambiti di responsabilità professionale dell'odontoiatra: in chirurgia estrattiva, nel settore protesico ed implantologico e nell'infezione da HIV.

In the last decades the problem of professional responsibility of the doctors went through deep conceptual re-examination. Some criteria, both general and more technically legal, are presented in order to correctly evaluate the professional liability. Then some specific aspects of the object are examined, such as the damaging of the inferior alveolar nerve after dental extraction, the problems concerning dental prosthetics and implants as well as the questions about HIV infection, acquired by patients or collaborators of the dentist, in his office.

Effectiveness of the current enamel-dentinal adhesives: a new methodology for its evaluation.

Two Class II boxes of standardized dimensions were prepared in each of 10 extracted third molar teeth. The dentinal adhesives Syntac, Gluma 2000, Scotchbond MP, and All-bond 2 were applied to five boxes each. All the boxes were restored with the same photopolymerizing resin composite. The microleakage of each restoration was measured in the permeability cell. The physiologic solution able to seep between the walls of the cavity and resin composite was measured and the flux of the liquid over time was calculated. All-Bond 2 was the only adhesive found, in some specimens, to make the dentin completely impermeable and to form an extremely precise seal between the resin complete material and the underlying dentinal surface. The flux values for all four adhesives were significantly different; Syntac allowed the greatest amount of microleakage. However, these in vitro results should not be considered absolute values.

[Dentin adhesives. An update]. / Gli adesivi dentinali. Aggiornamento.

Even if mechanical bonding to enamel utilizing the acid-etch technique has been very successful, adhesion to dentin is still a challenge to researchers and clinicians. Dentin is a vital tissue and differs in composition from enamel: acid-etching does not enhance the bond strength of composite resins to dentin and may elicit a severe pulpal response. For an effective bond to occur, a dentin bonding system has to be used. The first generation of methacrylate-based dentin adhesives was capable of chemical bonding to the inorganic phase of dentin. The chemical basis for this resin-dentin adhesive was the interaction between a phosphate group attached to the methacrylate and the calcium ions on the dentin surface. This system yielded rather low bond strengths which were clinically unsatisfying. The second generation of dentin adhesives became available to the profession recently. Each of these new bonding systems use similar chemical composition for the same purpose of bonding with physicochemical interaction to the hard tooth tissues. All these systems contain a mild acid dentin conditioner to remove the smear layer and an aqueous resin containing primer to improve monomer penetration into the hydrophilic dentin surface. The second generation dentin bonding systems are extremely sensitive to variations upon the completeness of instructions and how accurately these are followed by dental practitioners.

[Clinical experience with a new microfilled composite]. / Experiencias clínicas con un nuevo composite microparticulado.

The authors have investigated a new material for esthetic restoration for front teeth. It is a microfilled heterogene composite (Helio Progress) with spheridal prepolymer. The clinical trials were realized in cavities III, IV an V, in anomal y teeth and resin ceramic (with a pretreatment with silane). The results after 18 months have demonstrated the better characteristics of this material in relation with foreknown ones.

[Composite resin inlays. Convincing solution or uncertain compromise?]. / Incrustations en resine composite. Solution convaincante ou compromis incertain?

This is a report on the authors' clinical experience years of using laboratory composites. They describe the contours of composite resin preparations for inlays, discuss the advantages drawbacks of such restorations and provide limited indications. The illustrations also involve specific clinical cases.

[Application of the Ivory separator in dental restoration]. / La aplicación del separador de Ivory en las reconstrucciones dentales.

The Ivory widener is practical, quick and without deleterious effects on dental and gingival tissues. It allows a gradual and reproducible effect, good visibility of the operatory field and a better access to the dental cavity with saving of healthy tissue.