[Long-term survival of extensive amalgam restorations].

In cost-effectiveness analysis and contemporary treatment planning strategies, the postponement of placement of cast crowns plays an important role. Extensive Amalgam Restorations (EAR), that involve the rebuilding of cusps and the provision of auxiliary retention, are thought to make this postponement possible. This study reports the long-term survival (100 months) of EAR in a randomized, controlled clinical trial.

A preliminary study on a resin-modified glass-ionomer cement for transitional restorations and subsequent core buildups.

Purpose: The purpose of this study was to evaluate the serviceability of a resin-modified glass-ionomer cement for transitional restorations and subsequent core buildups in endodontically treated maxillary premolars.

Materials And Methods: Fifty Vitremer restorations were made in 42 patients by one operator during a period of 5 months. After 1 year of follow up, the quality of the restorations was assessed for the variables occlusal contacts, proximal contacts, marginal adaptation, and surface roughness.

Long-term survival of extensive amalgam restorations.

In cost-effectiveness analysis and contemporary treatment planning strategies, the postponement of placement of cast crowns plays an important role. Extensive amalgam restorations that involve the rebuilding of cusps and the provision of auxiliary retention are thought to make this postponement possible. This study reports the long-term survival (100 months) of extensive amalgam restorations in a randomized, controlled clinical trial.

The influence of absolute humidity on shear bond adhesion.

Objectives: The purpose of this study was to investigate the relationship between dentine shear bond strength, using data from experiments performed according to a standard protocol, and the absolute humidity for a new, fourth generation dentine adhesive system.

Methods: Results of seven recently performed adhesion experiments using the same protocol and product were analysed. Groups of 10 human molars were each bonded in a humidity chamber.

Intraoral humidity during operative procedures.

Results of dentine adhesion studies are influenced by many factors such as intrinsic and extrinsic dentine wetness. Relative air humidity and temperature are extrinsic environmental factors whose influence on dentine bonding capability is not precisely known. It was the aim of this study to gain an understanding of these factors as present in the mouths of patients and as influenced by several variables.

A 4-year clinical evaluation of extensive amalgam restorations--description of the failures.

The 4-year evaluation of a randomized controlled clinical trial to the functioning of Extensive Amalgam Restorations (EAR) is reported. In this trial 300 EAR were made by three operators on molar teeth. Five different auxiliary retention methods were used to retain these restorations.

Air humidity: a detrimental factor in dentine adhesion.

Successful dentine adhesion may be negatively influenced by intrinsic and extrinsic dentine wetness. Testing the influence of high humidity levels during the application of bonding systems is therefore relevant. It was the aim of this study to investigate in vitro the sensitivity to air humidity of the dentine bond strength for some commercially available bonding systems.

Esthetic veneering of amalgam restorations with composite resin--combining the best of both worlds?

Patients are becoming more and more aware of the esthetic alternatives to dental amalgam and are asking dentists to offer solutions that are more esthetically pleasing. However, the difficulties in inserting clinically durable composite resin restorations in the posterior area are numerous. With the high-copper amalgam systems, the dental profession has had an excellent restorative material.

Fabrication times for indirect composite resin restorations.

Fabrication times for indirect posterior composite resin restorations were recorded in a prospective clinical efficacy study. Four operators completed 132 one-visit inlays and onlays utilizing a new indirect posterior composite resin system (ICS). The mean time needed for the fabrication of one ICS restoration was 90 min, including the 'laboratory time'.

[Dowel and core systems for endodontically treated molars--in vitro loading].

The restoration of broken down pulpless molar teeth generally implies the provision of a cast post and core with a crown. In this experiment the failure resistance of some restoration methods utilizing amalgam and composite resin was investigated under an oblique load. Significant differences could be detected between the cast dowel and core, the methods utilizing composite resin and the methods utilizing amalgam.

Transverse resistance of composite resin restorations on dentin.

The transverse resistance of a dentin-bonded composite resin restoration was tested. Dentin and enamel surfaces of human molars were pre-treated differently. The specimens were stored for various periods.

Treatment time analysis for extensive amalgam restorations.

The treatment times for the fabrication of Extensive Amalgam Restorations (EAR) as recorded in a longitudinal clinical trial at the Dental School in Nijmegen were analyzed. 269 EAR's with different retention methods were made on molars by three operators. A mean total treatment time of 60 min was found.