Methods: The basic composition of the experimental temporary luting agent (PEE) was polyethylmethacrylate powder and eugenol oil. The powder/liquid ratio was varied from 1.0 to 1.6 in this study. Polycarboxylate cement and non-eugenol cement were used as control materials. The experimental materials were evaluated for setting time, consistency, film thickness, water absorption, water solubility and bond strength. Self-curing resin crown and stainless die abutment were used for the bond strength test. After the bond strength test, the failure pattern of the interface between the luting agent and die abutment was observed by a digital microscope.
Results: The following results were obtained: 1. No significant difference was observed in setting time between PEE and the control. However, the setting time of PEE1.0 was longer than that of PEE1.6. 2. PEE1.6 had low consistency compared with PEE1.0–1.4 and the control. 3. PEE1.6 had thick film thickness compared with PEE1.0–1.4 and the control. 4. PEE1.0–1.6 had low water absorption compared with the control. 5. PEE1.0–1.4 had high water solubility compared with PEE1.6 and the control. 6. No significant difference was observed in bond strength to self-curing resin and stainless die between PEE1.2–1.6 and the control. The bond strength of PEE1.6 was higher than that of PEE1.0. 7. Observations of the interface of the adhesion specimen showed that interface failure patterns were mainly between the luting agent of PEE1.6 and die abutment.
Conclusions: From the results, it was concluded that the experimental temporary luting agent indicated that the clinically suitable mixing powder/liquid ratio of the experimental temporary luting material is 1.2–1.6.