In this study nanosized Ag, CeO2 and TiO2 have been measured in multiple surface water samples collected along the rivers Meuse and IJssel in the Netherlands using single-particle ICP-MS as measurement technique.
In a move to increase the low survival rate after 2 years (60%) of class II ART restorations using glass ionomers in multiple surface cavities in primary teeth [ 39], researchers had considered replacing glass ionomer by the more fracture-resistant composite resin.
The present study showed again that composite restorations in multiple-surface cavities in primary molars could be produced with hand instruments only.
Notwithstanding the outcome of the systematic review [ 38], more information is necessary before the ART approach can be recommended for use in multiple-surface and anterior cavities.
ART using high-viscosity glass ionomer can safely be used to restore single-surface cavities both in primary and in permanent posterior teeth, but its quality in restoring multiple surfaces in primary posterior teeth cavities needs to be improved.
Since in reality, multiple surfaces show in the view frustum of a pixel along with changes in lighting conditions; therefore, multiple adaptive Gaussians are required.
In some occasions, as for the 3-year survival of ART restorations in single and multiple surfaces, the survival rates amongst the few longer term studies differed significantly and that resulted in large CIs for the weighted mean survival scores.
In the non-sequential mode of Zemax®; rays don't hit the optical surfaces in a predefined order, but can intersect the same surface many times and multiple surfaces in any order.
