IRCT2017101136711N1 IRCT 2017-11-13 Investigator Effect of an anti bleeding substance on durability of the composite restorations Effect of aluminum chloride as a hemostatic agent on shear bond strength of two step self etch and universal bonding agents used on extracted human teeth 2017-11-22 anticipated 40 Complete https://irct.ir/trial/27368 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Single, Purpose: Prevention, Other design features: This study is not a clinical trial one. It is an in vitro study. The study is done on the extracted human teeth. In our country, it is not necessary to get ethics committee code for extracted teeth. Now we want to submit this study to a journal of another country. In the author's instructions, it is written that ethics committee code is necessary even for the extracted teeth. As a result, we are proceeding to get this code. According to Iranian Registry Clinical Trial organization's laws, the date of the recruitment should be specified. Whereas the current study has been done on extracted human teeth and it has completed. The teeth were collected in the year 2016. Since this date has passed, it is not approved by the mentioned organization. Therefore the specified date is actually after the completion of the study. N/A Relationship between the aluminum chloride as a hemostatic agent and shear bond strength of a two step self etching and universal bonding agents. Intervention 1: Aluminum chloride as a hemostatic agent according to manufacturer's instructions (test group). Intervention 2: without hemostatic agent (control group).