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Updated: Jan 25, 2026
Standard Test Method ASTM D 7998-19 for the Cohesive Strength Development of Wood Adhesives
Published on: May 17, 2020
Effect of Time and Method of Drying on Bond Strength of Tray Adhesives with Vinyl Polysiloxanes
Rahul N Kothari1, Sudhakar Arpudaswamy2, Yamini Nandini3
1Department of Prosthodontics, Dr Hegdewar Smruti Rugna Seva Mandals Dental College and Hospital, Hingoli, Maharashtra, India.
Aim:
To establish an effective combination of drying time and drying method of the tray adhesive so that maximum bond strength can be achieved between impression tray and impression material.
Materials And Methods:
Cylindrical specimens of auto-polymerizing resin and addition silicone impression material were made. A total of 150 specimens were tested. They were divided into two groups Dentsply and GC. Each group was further divided into five subgroups: • Drying with compressed air for half the time as recommended by the manufacturer • Drying with air blower for half the time as recommended by the manufacturer • Open air drying as recommended by the manufacturer • Open air drying for 15 minutes • Open air drying for 1 hour The samples were tested for tensile bond strength using the universal testing machine. The results were subjected to statistical analysis.
Result:
Open air drying as recommended by the manufacturer was better than drying with a blower or compressed air. There was no significant difference between open-air drying for 5 minutes and open-air drying for 15 minutes or 1 hour.
Conclusion:
Open air drying as recommended by the manufacturer, i.e. 5min, showed good bond strength and drying for more than 5mins does not significantly increase bond strength.
Clinical Significance:
Tray adhesive should not be dried with compressed air or air blower. Tray adhesive should be applied and kept to dry according to the manufacturer's recommended time.
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