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At least 1,531 records · Page 85Linked to original sources
PubMed1990

A clinical trial of four light-curing posterior composite resins: two-year report.

A 2-year study of the clinical performance of four posterior composite resins used for Class I and Class II restorations is reported. Seventy-seven obturations were reviewed from the patients selected for a previous 9-month study. Obturations were assessed macrophotographically and by scanning electron microscopic evaluation of marginal quality. The 2-year results were compared to those obtained at 9 months. The macrophotographic evaluation revealed a satisfactory clinical appearance in the majority of restorations. However, scanning electron micrographic observations demonstrated that moderate-to-medium marginal degradation occurred during the first 2 years of clinical service. Therefore the use of the products under investigation should be limited to selected cases in which esthetics is of primary concern.

Acrylic Resins↗
PubMed1990

Aesthetic alternative to conventional posterior restorations.

In South Africa silver amalgam is still widely used as a filling material. Concern about the safety of the patient and dental personnel does exist, however, due to the possibilities of mercury poisoning. Demands for aesthetic dentistry are increasing in response to wider media coverage. More and more patients are asking their dentists to replace acceptable and faulty amalgam restorations with aesthetic alternatives. Such alternatives to conventional posterior restorations are discussed and their respective merits are considered.

Dental Amalgam↗
PubMed1990

Aesthetic limits of light-cured composite resins in anterior teeth.

The aesthetic limits of light-cured composite resins in anterior teeth are determined mainly by the size and nature of the lesion and the respective preparation. Also the shortcomings of the restorative material itself are of primary importance. The oral environment and the ageing effects ultimately limit the aesthetic expectations.

Chemical Phenomena↗
PubMed1990

Esthetics with glass-ionomer cements and the "sandwich" technique.

The Type II restorative esthetic glass-ionomer cement has not been generally regarded as a useful esthetic restorative. However, as long as its relatively slow-setting chemistry is understood and accepted and provision is made to maintain the water balance for the first 24 hours, it can be just as useful as composite resin. Taking into account the fluoride release, its tissue compatibility, and the chemical union with underlying tooth structure that is available, it is suggested that it has a valuable place in restorative routines. Manufacturers have been encouraged recently to try to produce a fast-setting cement that can be polished at the insertion appointment. A varnish to seal newly placed restorations is supplied by most manufacturers, but these are not completely waterproof. A low-viscosity, single-component, light-activated resin bonding agent has been shown to work satisfactorily as a sealant, and, with its use, it is possible to develop adequate translucency and optimal physical properties in the oral cavity.

Adult↗
PubMed1990

[Composites for anterior restoration. Clinical report].

The Authors, after a short description of the characteristics of composite materials used for restoration of anterior teeth, present clinical cases to demonstrate the improvement of such filling materials. The use of composite is increased even if the dentists should proceed with caution in order to obtain good and lasting results.

Adolescent↗