Written by George Freedman, DDS Monday, 07 November 2011 14:47
In First Impressions George Freedman, DDS, gives readers a brief summary of products that have recently been introduced to dentistry, based on his clinical experience.
|The clinical dentist is faced with choosing one or more restorative materials from among literally hundreds that are available. The most common day-to-day problems include high volumetric shrinkage, unpredictable and uneven translucency and opacity, and a comfortable viscosity. The longevity of the restoration can be greatly affected by microleakage, microcracking, and compromised aesthetics due to stain absorption. It makes sense to select a restorative material that solves some or all of these problems. Septodont has continued to develop its bis-GMA-free nanodimer technology and has introduced N'Durance Cristal, a highly translucent composite that is specifically designed for anterior restorations, but can also be used in posterior teeth for Class I and Class II preparations. Its natural translucency positions the Cristal A2 shade at the same light transmission levels as the enamel shades of competing composites. Cristal is a highly biocompatible, light-cure, nanodimer composite that exhibits very low volumetric shrinkage; this means that there is less stress at the tooth-restoration interface, reduced microleakage, and improved marginal integrity. The higher intraoral monomer conversion to long chains during polymerization optimizes physical and mechanical properties and results in less functional microcracking. The decreased presence of residual monomers makes it more biocompatible and less chemically irritating to the pulp. Cristal is hydrophobic for better long-term color stability. Continued manipulation makes it more pliable; this thixotropic property guarantees its "on-demand" viscosity that can please the most demanding practitioner. It is nonsticky, easy to place, position, and sculpt. N'Durance Cristal is radiopaque to allow for clear differentiation between the restoration, healthy and tooth structure and decay, and totally compatible with all bonding agents. |
For more information, call (800) 872-8305 or visit septodontusa.com.
|The placement of composite resins in the cavity preparation is always a stressful. It is typically better for long-term wear and function to use hybrid materials for posterior restorations; their downside is that they are rather viscous and may not manipulate well into all the nooks and crevices of the cavity. This maladaptation cannot be seen by the operator and risks bubbles, air spaces, and marginal gaps. The solution is most often to use a less viscous flowable resin in high-risk areas. The downside of this compromise approach is that most flowables are not as strong or wear-resistant as hybrids. Brasseler USA has introduced the ET3000 oscillating composite manipulation instrument (OCMI), the first vibrational device that can effectively overcome both the stickiness and the lack of flow of the more highly filled composite resins. It eliminates the stickiness and tug back of composites after they are placed into the cavity, allowing them to flow more efficiently into the less accessible recesses and for the development of anatomy. The instrument's oscillations increase hybrid composite flow by 30%. The ET3000 OCMI is well balanced and lightweight, cordless, and very portable. The 14 different tip designs can accommodate every clinical requirement, from preventive pit and fissure procedures to Class I through V restorations, always reducing the occurrence of voids and air bubbles. The chucking system is quick and intuitive. The lithium ion battery can operate for many hours on a single charge. The ET3000 is also very useful in shaping and contouring the surface anatomy of any composite prior to polymerization, reducing the need and time for adjustment and polishing. |
For more information, call (800) 841-4522 or visit brasselerusa.com.
For more information, call (877) 477-8977 or visit dentalgps.com.
|In-office bleaching systems tend to be complicated: many components, many steps, and a long time for the patient in the chair. In addition, the during and post-treatment sensitivity associated with some in-office tooth whitening modalities makes them quite uncomfortable. KLOX Dental Specialties has introduced FAST&MILD, a novel multilight activated, advanced chairside tooth whitening treatment. The system is based on photodynamic technology, the combined use of chemical photo sensitizers with an enhancing gel and a nonproprietary activating light. The light energy stimulates photo sensitizers to produce oxygen molecules. The active bleaching agent consists of a 29% hydrogen peroxide solution. The tooth gel has been designed to change in color from bright orange to white once the action of the photo sensitizers has reached the optimal level and the peroxide has been activated. This signals the end of the destaining cycle and helps to prevent inadvertent overexposure to bleaching agents. Intraoral isolation can be accomplished in less than 5 minutes. Typically, anywhere from 4 to 6 sessions of 2-minute active bleaching will provide a significant whitening of the teeth. Thus, the entire treatment is "fast," requiring only 30 to 45 minutes, a significant chairside advantage. The photochemical process is a cold reaction; it produces negligible increases in tooth temperature, and is thus unlikely to cause thermal tooth sensitivity. The treatment is "mild," with less sensitivity, less dehydration, and is nonabrasive. Any visible-light spectrum device (diode, halogen, plasma arc, or bleach-activator) can be used; there is no need to purchase another proprietary bleaching lamp. The kit also includes a take-home LifeSmile brightening pen containing 15% carbamide peroxide for at-home use. |
For more information, call (866) 653-KLOX (5569) or visit the Web site kloxtechnologies.com.
For more information, call (888) 347-7576 or visit the Web site at azenic.com.