[Study on clinical standard consistency of the luting cement]

Various properties of dental luting cement are influenced by powder/liquid ratio. The standard consistency of luting cement is determined in Japanese industrial standard and American dental association's specifications. However, it is not considered that a constant consistency is best for luting cement of all kinds. This study were performed on suitable consistency of individual cement with regard to bond strength and disintegration. Most suitable consistency was almost the same as standard consistency by the specification in the case of Zinc phosphate cement (GC's Elite cement 100). But, in the case of Polycarboxylate cement (Shofu's HY-Bond carbo cement) and Glass alkynoate cement (GC's Fuji ionomer Type I Liv), maximum bond strength can be obtained with a more powder/liquid ratio than standard consistency by the specification. Especially, Glass alkynoate cement shows this tendency strongly. Therefore, it must be manipulated quickly after mixing.