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PubMed1982

[Matrices].

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Dental Instruments↗
PubMed1994

Reducing microleakage in Class II restorations: an in vitro study.

The aim of this in vitro study was to evaluate four methods of reducing the marginal microleakage of directly placed Class II composite resin restorations. Mesio-occlusal and disto-occlusal preparations with all margins confined to enamel were placed in extracted human molars. The teeth were restored with one of four techniques using multi-incremental placement, stored for 24 hours in 37 degrees C water, thermocycled, and placed in a dye solution. The teeth were sectioned in a mesiodistal direction through the restoration and evaluated for microleakage at the gingival margins. Restorations placed in conjunction with an enamel bonding agent demonstrated severe microleakage. Marginal microleakage was reduced by the use of an extended base of visible light-cured glass-ionomer cement, a BondAband, or a dentinal bonding agent.

Analysis of Variance↗
PubMedDate not supplied

New instrumentation and technique for obtaining consistent interproximal contacts of direct Class II composite restorations.

The difficulty in obtaining tight proximal contacts and properly placed contours in direct Class II composite resin restorations continues to demand a high level of proficiency when using conventional Class II techniques. Despite the highly improved composite resins and fourth-generation dentin bonding systems available, comparatively little advancement has taken place in instrumentation for reducing technique sensitivity and procedural time. This article introduces a prototype instrument which uses simple mechanical principles to overcome the difficulties in placing direct Class II composite restorations. The learning objective of this article is to familiarize the reader with the instrument, its principles, and the application technique.

Composite Resins↗
PubMedDate not supplied

Achieving interdental integrity in resin-bonded posterior ceramic restorations.

Increased physical strength of ceramic materials and increased bond strength now make it feasible to use these materials in the posterior area, and these restorations are aesthetic to the point of being virtually indistinguishable from natural teeth. These restorations are more technique-sensitive, and the restrictive anatomical proximities present an additional challenge, requiring meticulous attention to preparation, impression, temporization, fabrication, and cementation procedures. The health of the tissues investing and supporting the teeth has long been accepted as essential. The learning objective of this article is to share the knowledge gained in clinical experience with other clinicians.

Dental Marginal Adaptation↗
PubMed1993

The use of composite resins in combination with anchorage posts as core material in endodontically treated teeth: clinical aspects of the technique.

In vitro tests and a clinical examination of 51 patients who were treated over a period of 12 years have demonstrated that a composite resin core that is surrounded by a gold crown may provide the same function and strength as a conventional gold core. However, the method demands a thorough knowledge of the materials and a careful and detailed technique. The importance of an initially effective dentinal bond to the chosen hybrid composite resin is stressed. Zinc phosphate cements and the technique of cementing are also discussed. In most cases, a damaged root will have to be reinforced with a post, and the author recommends the use of a threaded titanium post that fits well and is bound to the root with a so-called passive cementation technique. The author has also had positive experiences with composite resin crowns, which can be expected to have a functional life of at least 10 years.

Cementation↗
PubMedDate not supplied

Direct esthetic restoration of anterior root canal-treated teeth.

The esthetic restoration of anterior root canal-treated teeth with significant loss of tooth structure is a challenging clinical situation. For younger patients or for patients requiring interim treatment plans, restoring badly broken-down anterior teeth with composite resin provides an expedient and esthetic solution. Current visible-light-activated composite resin materials require an incremental build-up to ensure adequate depth of cure. With the use of custom-contoured, stabilized, thin crown forms and strategically placed vent holes, the clinician can efficiently provide cost-effective direct composite resin restorations that meet the patients' esthetic needs.

Composite Resins↗
PubMed1996

Passive wedge.

The article describes a new technique for fabricating a wedge directly in the mouth during clinical procedures. It is called a passive wedge because it is kind to the soft tissues, exerting neither compression nor traction on them. A conventional rigid wedge may hurt the interdental papilla, initiating bleeding and the flow of fluids through the rubber dam. This new technique is very useful during adhesive procedures, because the wedge prevents moisture from invading the working area and the cavity, maintains the matrix in place, and causes no harm to the soft tissues, allowing the restoration to be finished properly.

Dental Instruments↗
PubMedDate not supplied

A modified matrix technique for the application of restorative materials on the facial surfaces of teeth.

A Tofflemire matrix is modified and is secured in place with the help of Super Floss and unfilled light-activated resin or light-activated impression material. The matrix prevents excess cementing medium escaping in the gingival area, providing excellent isolation. The technique is simple and provides good esthetics while minimizing lengthy and traumatic finishing procedures.

Composite Resins↗