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Biomedical subjects

G Piana

Publications and source records attributed to G Piana.

11 recordsLinked to original sources
PubMed1991

[Dentinal bonding systems and the tensile bond strength test].

The aim of the present study was to evaluate the tensile bond strength of four dentinal bonding agents (DBAs) to the dentin surface. Tensile bond test procedure was made using a universal testing machine. Human extracted third molars were mounted with self-curing acrylic resin in cylindrical molds. The dentin occlusal surface was ground with 320-grit silicon carbide abrasive paper. The DBAs were prepared according to manufacturers' directions and applied on the dentin surface. Cylindrical teflon tubes were placed on the dentin surface and filled with a microfilled resin. The samples were then stored in a humidifier at 37 degrees C for 24 h. Six specimens were prepared for each group. A statistically significant difference was observed among the four groups. It has been observed that certain materials showed a dentin bond value superior to cohesive value of composite resin.

Dental Cements↗
PubMed1990

[Glass-ionomer cements in Class V restorations].

The aim of the present study was to evaluate the effect of two different techniques of glass-ionomer application on the marginal microleakage in Class V restorations. Two types of composite resins were also used. Nonretentive Class V cavities were prepared at the cementum enamel junction of human extracted third molars. Glass-ionomer cements were applied with a chamfer technique or as base in the floor of the cavity. After restoration, the samples were stored in dye solution, sectioned and observed under optical stereomicroscope. The base technique for glass-ionomer cements showed less microleakage than the other restorative methods.

Composite Resins↗
PubMed1989

[Knowing pemphigus].

The classification, pathogenesis, clinical features and treatment of pemphigus are examined with emphasis' on the histopathological similarities of the elementary intraepithelial lesion and the histotopographical differences at epithelial level that differentiate the various types of pemphigus. In a detailed review of the pathogenesis of the condition, the circumstances propitious for the onset of pemphigus are identified as an HLA phenotype and the autoantigenic denaturation of the glycocalyx. The condition is described as vesicolobullous and is differentiated from similar bullous and non-bullous dermatoses. The most significant pictures of oral pemphigus are specified as are the basic elements of general and local treatment.

Autoimmune Diseases↗
PubMed1989

[Candida-host relationship: physiology and pathology].

The Authors give a detailed analysis of the potential virulence factors and possible pathogenic processes associated with candida. They qualify the interactions between local, general, natural and acquired defences, setting out the possible deficiency involved in the emergence of secondary candidiasis. They make a classificatory revision of forms of candidiasis on the basis of topographic, anatomo-pathologic criteria and of the course of the disease. They investigate the most significant aspects of the situations described especially in oral localization. An evaluation is made of chronic mucocutaneous candidiasis as a pathological affection in itself and in its correlation with H.I.V. infection.

Acquired Immunodeficiency Syndrome↗
PubMedDate not supplied

[Anomalies of enamel structure: description of a clinical case].

The anomalies of dental structure are quite common in pediatric dentistry; these anomalies can involve separately or in the same time enamel, dentin or cementum and they are due to many factors acting during odontogenesis and istogenesis. The Authors analyse these abnormalities and describe a personal case.

Adult↗