Two more esthetic properties of natural teeth are fluorescence and opalescence. These two properties contribute to the vitality and lifelikeness of teeth. In natural dentition, dentin (specifically the hydroxyapatite minerals and organic matrix) is more fluorescent than enamel. The shade of the dentin, which should be considered the base among the dentin elements, is recorded at the level of the central part of the vestibular cervical third. The least amount of enamel is found here, but a large volume of dentin is present. On the other hand, the shade of the enamel should be recorded at the middle third of the teeth, where it is generally two or three shades lighter than the shade chosen for the dentin. When a tooth is built up with composite, it can be difficult to achieve the desired color result. When the enamel layer is too thick, it may appear too gray and if it is too thin, the restoration may be too opaque. In addition to the traditional shades, the composite systems offer pale or white shades. However, these colors often have insufficient value gradient and as a result are very white. Consequently, for higher value esthetic cases, specially calibrated products are available that provide smooth transitions and achieve ideal variations.
Nanoparticles are proportional to a football, like a football is to the earth
Dental Composite Handling Properties Fillers largely determine the strength of composite. The more filler, the stronger the composite. However, too much filler leads to a material that is too rigid. The ideal blend optimizes strength and the ability to be processed. The content of composite filler can be expressed in two ways: as weight% or volume%. Importantly, since filler particles weigh far more than resin, it stands to reason that the percentages of weight% are much higher than the volume%.
But perhaps the most important consideration for most dentists when choosing a composite is how the material feels. Working comfortably with a material is critical to the overall result of a restoration.
Ideal Characteristics of Composites
• Radiopaque • Low shrinkage when curing • Easy to handle, non-sticky, easy to shape • Easy to dispense • Excellent and lifelike esthetics • Stable color
HuFriedy Akro-Flex
American Eagle
• No color difference after curing • Not sensitive to ambient light • Chameleon effect with neighboring elements • Short application and finishing time • Little polishing required • No voids or bubbles • Strong and durable without marginal leakage, fractures or discoloration • Excellent physical properties, tested scientifically
Akro-Flex is an extremely flexible composite tool and performs like a paintbrush. The ultra-thin blades made of titanium easily reach the interproximal spaces and provide better visibility compared to traditional composite instruments.
Composite instruments coated with XP technology. XP is a nanotechnology in which the surface of the instrument is microscopically infiltrated with a coating that creates a super hard, smooth and scratch- resistant surface and prevents the adhesion of composite to the instrument. For common instruments, the composite adheres to the microparticles of the instrument.
What Colors Are Available? Composite is a synthetic material that adheres to the surface of a tooth for a perfect tooth filling. Emulating natural dentition and adjusting the color to achieve an unnoticable restoration and an increased esthetic involves 3 aspects: shade, saturation and value.
The XP composite instruments are non-stick.
LM Arte Set Style Italiano
The LM Arte family of composite instruments were developed in collaboration with Style Italiano, a group of Italian dentists specializing in esthetic dentistry. LM-DuraGrademax is made of high- quality steel and non-stick.
Today, most composite systems use VITA ® to classify shades. The classic shades are: A, B, C and D.
A represents the highest value (brightness), and D the lowest value. In addition, each letter has a number-code. This number- code provides information about the chroma (saturation): 1 = lowest saturation, highest brightness, and 4 = highest saturation, lowest brightness.
4
PRACTICAL GUIDE COMPOSITE
5
Order online via www.cliniclands.dk or by phone 71 82 65 83
Powered by FlippingBook