[en] This report updates a study in progress to determine the long-term fate of inhaled 0.7 μm, 1.5 μm, or 2.8 μm activity median aerodynamic diameter (AMAD) or polydisperse (1.5-2.0 μm AMAD) aerosols of ¹³⁴Cs-labeled aluminosilicate using Beagle dogs. Clearance models developed from results obtained during the first 2 yr after inhalation were used to simulate additional data to 4 yr after exposure. The original models fit the new data satisfactorily, with the exception that the smallest particle size might have an increased dissolution rate at the later times after exposure. These results add to a growing data base on deposition and long-term fate of airborne particles inhaled by a laboratory animal. 2 references, 1 figure