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Dual‐cure luting composites. Part I: filler particle distribution
Author(s) -
INOKOSHI S.,
WILLEMS G.,
MEERBEEK B.,
LAMBRECHTS P.,
BRAEM M.,
VANHERLE G.
Publication year - 1993
Publication title -
journal of oral rehabilitation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 93
eISSN - 1365-2842
pISSN - 0305-182X
DOI - 10.1111/j.1365-2842.1993.tb01597.x
Subject(s) - filler (materials) , composite material , materials science , particle size , scanning electron microscope , particle (ecology) , chemistry , oceanography , geology
Fourteen dual‐cure luting composites were analyzed for their filler particle shape, predominant and maximum filler size, and filler weight in function of their clinical use. Polished surfaces were etched with an argon ion beam and studied by means of scanning electron microscopy. The type of filler particles, either inorganic or prepolymerized, could clearly be recognized. Their shapes were angular, rounded or spherical, depending on the product. The maximum filler size varied extremely from less than 1 urn to 250 urn. A particle‐size distribution analyser disclosed a bell‐shaped filler‐size distribution. The predominant filler size for all the products was much smaller than the maximum filler size. The filler weight varied from 36 to 77%. After ion etching, some products showed small areas with a low degree of filler loading. A classification of the luting composites based on the maximum filler size is proposed. Since the particle size varies widely within the group of products analyzed, a standard specification for luting composites is urgently needed.