Premise Research
Gloss Values
In traditional hybrid composites, the filler size (approximately 0.6
to 1.0 µm average) dictates a certain wear characteristic that, while
acceptable, still offers room for improvement. During the life of a
hybrid, these inorganic filler particles become detached from the resin
matrix because of wear or "plucking."
Over time, this effect results in loss of luster and causes the
composite restorative to look dull, or even "frosty." In 1999, in order
to address the issue of polish, Kerr introduced Point 4 with an average
particle size approximately one-half that of traditional hybrids. Point
4 composite contains 0.4 µm barium glass as the main filler component.
With this advancement, polish at placement and at subsequent recalls
greatly improved.*
*
Gloss values after abrasion measured both at Kerr Dental Materials
Center as well as outside research facilities showed nearly identical
values to the gloss values of microfills.
|
|
