Biomedical Engineering Reference
In-Depth Information
borosilicate, borosilicate, lithium silicate, lithium alumina silicate,
amorphous silica, ammoniated or deammoniated calcium phosphate
and alumina, zirconia, tin oxide, and titania. Suitable illers have a
particle size in the range from about 0.1−5.0 μm, and may further
comprise unbound silicate colloids of about 0.001 to about 0.07 μm.
These additional illers may also be silanized.
The amount of total iller composition in the dental composite
can vary widely, being in the range from about 1 to about 90%
by weight (wt%) of the total composition. The amount used is
determined by the requirements of the particular application. Thus,
for example, crown and bridge materials generally comprise from
about 60 to about 90 wt% iller, luting cements comprise from about
20 to about 80 wt% iller, sealants generally comprise from about 1
to about 20 wt% iller, adhesives generally comprise from about 1 to
about 30 wt% iller and restorative materials comprise from about
50 to about 90% iller, with the remainder in all cases being the resin
composition.
The expected outcomes are new formulations for dental
composites with improved adhesive bonding to dentin and enamel
surfaces, improved durability, esthetics, and biocompatibility.
Nanostructured dental composites can have superior mechanical
properties (e.g., increased elastic modulus, strength, or resistance to
fatigue fracture) that can easily be tuned by small modiications of
their building blocks.
References
1. Abron, A., Hopfensperger, M., Thompson, J., and Cooper L.F. (2001).
Evaluation of a predictive model for implant surface topography effects
on early osseointegration in the rat tibia model, J . Prosthet . Dent ., 85 ,
pp. 40-6.
2. Adamek, G., and Jakubowicz, J. (2010). Mechanoelectrochemical
synthesis and properties of porous nano Ti-6Al-4V alloy with
hydroxyapatite layer for biomedical applications, Electrochem .
Commun ., 12 , pp. 653−656
3. Berglundh, T., Abrahamsson, I., Albouy, J.P., and Lindhe, J. (2007). Bone
healing at implants with a luoride-modiied surface: an experimental
study in dogs, Clin . Oral Implants Res ., 18 , pp. 147−152.
4. Boyer, R., Welsch, G., and Collings, E. (1994). Materials Properties
Handbook: Titanium Alloys , ASM International, Materials Park, OH.
 
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