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Updated: May 3, 2026

Standard Test Method ASTM D 7998-19 for the Cohesive Strength Development of Wood Adhesives
Published on: May 17, 2020
[Effect of bonding strength of dentin adhesive agent under 2 kinds of storage temperatures]
Xiao Zhang1, Qing Wang, Miao-miao Xue
1Department of Prosthodontics, the Fourth Affiliated Hospital, Zhengzhou University. Zhengzhou 450052, Henan Province, China.E-mail:zhangxiaoxiao67@126.com.
Purpose:
To measure the changes of bonding strength of dentin adhesive agent at different storage temperatures.
Methods:
One hundred extracted bicuspids were randomly divided into 10 sets, 10 teeth in each set. Each set was further divided randomly into Group A and Group B, each with 5 teeth. During a 10-week test period, Groups A and B were applied with adhesives labeled A and B. Group A was refrigerated under 4 degrees centigrade and B was stored at room-temperature from the second week on. The first set was stored at the same situation. The shear force of samples were tested by universal material tester at the speed of 1 mm/min. The results were evaluated using one-way ANOVA and LSD t test using SPSS 18.0 software package.
Results:
According to one-way ANOVA, the shear bond strength of the 2 groups differed significantly (P<0.05). Comparing the sets by LSD t test, the results showed that during the first 5 weeks, there was no significant difference between Group A and B. However, there were measurable differences in performance after 6 weeks.
Conclusions:
With time goes on, the bonding strength of both refrigerated and room-temperature adhesives tend to diminish. After 6 weeks, the bonding performance of the 2 groups begins to differ significantly, and the refrigerated adhesives are superior to room-temperature adhesives.
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