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Purpose: This in vitro study was carried out with the aim of studying the impact of the temporary siman (Cavex) removal methods on the connectivity of two different resin icons to the dentin surface. Tool and Method: In the study, 40 newly drawn human molar teeth's oclusal surfaces were prepared until the surface of the dentin was revealed. Each of the tooth that formed the experimental group was placed on the 15mm diameter and 10mm height polymer tubes so that the oclusal surfaces were straight to the vertical axis of the parallelometer, and the tooth was buried in the autopolimerized transparent acrylic cylinder blocks. A group (N=5) was divided into a sample control group after the other sample surfaces had a diameter of 3 mm in the patterns, according to the instructions of the manufacturer company. Siman waste on the surface of the samples kept in distilled water at 37°C for 7 days was removed for 10 seconds by three different techniques, including a sharp hand tool, air-flow and phosphoric acid. Later all the dents are loaded under 5 N luke on the surface, Panavia F2.0 and Panavia SA are attached with 3 mm shapes. Cutting type (shear bond strength) connectivity resistance was measured with 1.0 mm head speed per minute using the Universal test machine. Connectivity values and standard deviations were calculated. The results were evaluated by variance analysis and Tukey multi-comparation and t test. Results: The cleaning methods (p<0.05) and the siman type are statistically determined to be meaningful (p<0.001) and the interactions are not meaningful (p>0.05). Debate: Before synthesis with aditive sims is done, the temporary sims must be fully cleaned. The Effect of Temporary Cementation Removal Methods on Bonding Strength of Two Different Resin Cements on the Dentine Surface ABSTRACT Aim: The aim of this in vitro study was carried out to investigate the effect of temporary cements (Cavex) removal methods on the bond strength of two different resin cements to the dentin surface. Material and Methods: In the study, 40 fresh extracted human molar teeth were prepared until exposed the dentin surface. Each of the teeth forming the experimental group was placed into polymeric tubes of 15 mm diameter and 10 mm height and their occlusal surfaces were placed perpendicular to the vertical axis of the parallelometer and the teeth were embedded in autopolymerizing transparent acrylic cylinder blocks. After separating a group (N=5) as the sample control group, the non-eugenic temporary cement was placed in the molds with diameter 3 mm on the other sample surfaces in accordance with the manufacturer's instructions. The cement residues on the surface of the samples which were kept in distilled water at 37 ° C for 7 days were removed with three different techniques as a sharp hand tool, air-flow and phosphoric acid for 10 seconds. Then, under 5 N load on all dentin surfaces, Panavia F2. 0 and Panavia SA resin cements were bonded with 3 mm molds. Resistance to shear bond strength bonding was measured using a universal test machine with a head speed of 1.0 mm per minute. Attachment values and standard deviations were calculated. The results were evaluated by variance analysis and Tukey multiple comparison and t test. Results: The removal methods (p<0.05) and cement type (p<0.001) were significant effect on bonding strength of dentin surface. However, the interaction of between removal methods and cement type does not significant effect on bonding strength (p>0.05). Conclusion: Before the adhesive cementation, the temporary cements must be thoroughly cleaned. Keywords: Temporary cement, dentin binding, cleaning methods

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