Effects of the ratio between adhesive and solidification agent on the physical properties of the investment for zirconium-oxide titanium / 实用口腔医学杂志

ABSTRACT

Objective:To study the effects of different ratios between adhesive and solidification agent on the investment of titanium and to investigate the physical properties of the adhesive on different time intervals.Methods:Mixed adhesive with solidification agent according to different ratio14∶1,14.5∶1,15∶1.Twelve wax sheet patterns(10 mm?10 mm?0.8 mm)were invested,and then the castings were fabricated.Manipulation performance,appearance of the casting mold,and color of the castings as well as their integrity and edge clarity were observed.The more ideal proportion was selected and determined.Dynamic viscosity,density and pH value of the adhesive were measured on different days(1,3,5 and 7 days).Results:With a adhesive or solidification agent ratio of 14∶1,the solidified time was comparatively short and unable to operate,while with a ratio of 15∶1,the solidified time was too long to solidify and led to the distorted castings.In group with a ratio of 14.5∶1,the primary gel time,intact mold and cast gate were appropriate.The surface of the castings showed bright,metal color after sand blasting.Dynamic viscosity,consistency and pH value of different days for the adhesive had no significant difference.Conclusion:Favorable casting can be fabricated for adhesive mixing with solidification agent when the ratio was 14.5∶1.The adhesive has steady capability in 7 days in practical condition.