<prompt> Ethoxy benzoic acid increases the strength and solubility of the cement:Zinc oxide eugenolPolycarboxylate cementZinc phosphate cementSilicate cement  <response>: Modifications have been made to improve the strength and abrasion resistance of ZOE cement for long-term luting. One system substitutes orthoethoxybenzoic acid EBA for part of the eugenol liquid, and includes alumina in the powder. Another system ZOE plus polymer consists of eugenol liquid and a special powder containing of 20 to 40 by weight of fine polymer particles and zinc oxide particles that have been surface treated with carboxylic acid.Phillips 12 ed pg 331 