Signature (Ramsey, N.J.)最新文献

The search for tooth-colored and metal-free restorations is one of the major challenges in dental research. For several decades, ceramic has been used as a restorative material because of its aesthetics and stability. Unfortunately, the survival rate of most all-ceramic systems seems unsatisfactory; due to the natural brittleness of ceramic, fractures have been the primary reason for the high failure rate. Since 1988, the University of Zurich Dental School, Switzerland, has been working with the IPS Empress all-ceramic system (Ivoclar/Williams, Amherst, NY). This article reports the clinical and research data from approximately 3,000 all-ceramic restorations.

The initial glass-ionomer cements have become well-known restorative materials and have achieved success in a variety of procedures. The newest generation of glass-ionomer cements contain more resin, have higher cohesive strengths, and are light cured, compared with previous generations. Other fluoride-releasing resins with glass-ionomer properties have been developed, and they are called "compomers." One such recently introduced material is discussed in this article. A clinical case report is presented, illustrating the utilization of this material in the restoration of a mandibular second primary molar.

Only a few decades ago, the use and fabrication of provisional restorations was still a neglected area of restorative dentistry. Recently, a new recognition has been given to the importance of provisional restoration--maintenance of space for the tooth being, restored, acceptable interim aesthetics, cover against bacterial infiltration, and the registration of vital information for the fabrication of final restorations. This two-part article presents the clinical procedures for the utilization of provisional restorations in the anterior area and in inlay/onlay preparations.

In developing improved dental materials and application techniques, high standards and goals are set by the clinicians and the manufacturers. This article summarizes the prerequisites and desirable qualities required of composite resins for long-term success. A particular composite has demonstrated predictable and consistent long-term results and has established its place in quality dentistry. The applications for this composite resin are outlined in a clinical procedure. Its anterior/posterior universality is recognized. Several pre- and postoperative examples, in function for up to 12 years, are used to illustrate the results.

All-ceramic restorations have gained patient acceptance and are increasingly being used in aesthetic appearance-related restorations. This case report of a single anterior crown matching natural dentition utilizes some of the new special-effect ceramic powders designed for use with the layering technique. These powders help to properly replicate incisal, mamelon, and gingival areas. The clinical procedure is described, using photographs of the case to illustrate the steps involved.

Adhesive resin systems have become increasingly popular as they have been demonstrated to infiltrate conditioned vital dentin to cohesively hybridize the biologically altered substrates for adhesive bonding. This paper is a review of the biologic and clinical use of Syntac (Ivoclar Vivadent) and Variolink (Ivoclar Vivadent) adhesive systems for cohesive hybridization of vital dentin to prevent patient postoperative hypersensitivity and bacterial microleakage following clinical preparation.

Pending the fabrication of permanent restorations, temporary restorations are used to maintain the function and provide the necessary information for accurate fabrication of permanent restorations. Therefore, the quality and appropriateness of materials used in temporary restorations are important to the final results. This article introduces a new material system for temporary restorations. A case report is used to illustrate the technique and the discussion.