Journal of esthetic dentistry最新文献

This article examines and compares the extent of microleakage after 24 hours in freshly extracted teeth using three newer or "third generation" dentin bonding agents. Gluma/Pekalux and Scotchbond 2/Silux were more effective in preventing microleakage in cementum/dentin margins than was Universal Bond/Prisma Micro-fine.

The antimicrobial activity of several visible light cured glass ionomer and liner materials against three bacteria commonly found in the oral cavity is discussed. Vitrabond light cure glass ionomer produced zones of inhibition against all the bacteria tested in this study. It appeared to resemble a true glass ionomer cement in regard to its antimicrobial properties whereas the other materials used in this study appeared to possess no antimicrobial activity.

Hybrid composites have been a popular class of a wear-resistant posterior composite restorative material. The purpose of this study was to determine the effect of hybridization on the physical properties of a composite with different amounts of submicron silica (0.04 microns) with semiporous strontium glass (1.4 microns ave. by number/5 microns ave. by volume) in a Bis-GMA based resin system. As the submicron content increases, the total filler loading in the composite was increased. At the 25 percent submicron silica level, the filler loading was highest and the physical strength measurements were highest, except for DTS results, which were fairly steady throughout the 5-40 percent level.

Shade guides that are included in most composite kits are not made of the actual resin material. Therefore the true shade, translucency, or opacity of the composite resin is not readily apparent with stock shade guides. Due to this fact, it has become evident that the best solution to the shade guide problem is to construct a custom shade guide from the actual resin. Until recently, fabrication of custom shade guides has been a time-consuming, inefficient task. Now, a simple and efficient method of forming accurate shade guides for composites is available. With its unique handle/template design, T-TABs enable a dentist to create a precise, labeled shade guide within minutes. There are many advantages to both dentist and patient when T-TABs are employed in the construction of custom shade guides.

The use of today's highly sophisticated dental materials has required a corresponding increase in the technical skills of the operator. Surgical telescopes with high resolution and contrast are replacing plastic lenses of somewhat lesser quality. Moreover, depending on their frame mounting, these ground glass magnifiers are also offering the operator additional comfort and safety. The problem for the dentist, however, is to assess properly the products currently being presented by manufacturers. A detailed description of each device offered by four major suppliers is given relative to true field width and depth, working distance or range, "down time" during prescription changes, usefulness with correction, operator positioning, light admittance, degrees of magnification available, and expense. Photographs of the operator practicing without magnification and then using each of three devices is shown and analyzed. With some exceptions, those instruments providing the most flexibility as regards the above factors are most worthy of the dentist's consideration.

The technique of reattaching traumatically fractured crown segments using bonded tooth-colored materials has improved over the last decade. The latest advancement is the use of a new visible light-hardened glass ionomer material for rapid initial replacement of detached coronal structure. This paper demonstrates a step-by-step procedure for coronal repair using light-hardened glass ionomer material and application of broad plane bonded composite resin for strength and natural appearance.

Smile-imaging is a new concept in dentistry that offers an impressive level of predictable and successful esthetic results. It is useful in the diagnosis, communication, and treatment phases of esthetic cases regardless of the treatment plan. Smile-imaging builds esthetics into the case instead of adding them on at the end. It is available to any dentist without having to spend time learning a computer program or investing in equipment. Full-face pictures of the patient are all that are required from the dentist.

The use of an acid-etch enamel resin bonded Class III restoration allows for a more conservative cavity design. The acid-etch technique's benefits include retention without dentinal undercuts and creating reinforcement of undermined enamel. When a controlled method of acid-etched enamel resin-bonding with a syringe technique is used with a visible light curing composite resin, a durable, esthetic Class III restoration is achieved.

The introduction of new porcelain materials used in combination with vastly improved bonding materials and techniques have virtually revolutionized the use of conservative esthetic bonded prosthetic restorations fabricated without the need for metal substructures. Missing anterior teeth in selected cases may be replaced by all porcelain veneer bridges that are accomplished with more conservation of natural tooth structure of the abutment teeth as compared to traditional procedures. A total of 12 all porcelain veneer bridges were monitored for varying periods up to 24 months postoperatively, during which time no fractures occurred. The authors have attributed this high early success rate primarily to several factors, namely (1) case selection, (2) bulk of porcelain at the sides of the major connectors, and (3) adjustment of occlusion and articulation with the opposing teeth.