A review of polymerization shrinkage stress: current techniques for posterior direct resin restorations.

In general excellent results cannot be guaranteed when using resin-based composites for posterior restorations. This is due to polymerization shrinkage which can still be regarded as the primary negative characteristic of composite resins. A review of available literature regarding the polymerization process, its flaws, and suggested strategies to avoid shrinkage stress was conducted.

Whitening effect by stain inhibition from a chewing gum with sodium hexametaphosphate in a controlled twelve-week single-blind trial.

Objective: A twelve-week clinical study was conducted to assess the effect of a chewing gum containing sodium hexametaphosphate (4%) on the inhibition of stain formation.

Methodology: Fifty-four subjects were entered and completed all aspects of the study. Twenty-seven of the subjects were smokers, and the other half did not smoke.

Clinical evaluation of the use of fiber posts and direct resin restorations for endodontically treated teeth.

Purpose: Restoration of root-treated teeth is routinely performed in clinical practice with a choice of therapeutic options, considering many factors to provide optimal mechanical properties, esthetics, and longevity. The aim of the present work was to present a preliminary clinical report on the use of fiber posts and direct resin composites for restoring root-treated teeth.

Materials And Methods: Thirty-eight anterior and 62 posterior endodontically treated teeth were selected from 3 private prosthodontic offices.

Restorative alternatives for the treatment of an impacted canine: surgical and prosthetic considerations.

Impaction occurs more frequently with maxillary canines than with any other tooth except maxillary third molars. For functional and aesthetic purposes, impaction must be treated in a manner that facilitates recreation of the anatomical structures in the canine region. The general treatment of choice is surgical and orthodontic restoration of the impacted canine.

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].

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.

[Dentin adhesives. An update].

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.

[Clinical experience with a new microfilled composite].

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).

[Composite resin inlays. Convincing solution or uncertain compromise?].

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].

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.