Marginal Microleakege in CL II Occlusal-Proximal Cavities Sealed with Different Temporary Filling Materials: An in vitro Study

Marginal microleakage is the process of mechanical micro-separation where the separation between the restorative material and the cavity walls is observed, causing the infiltration of salivary fluids. Therefore, the purpose of this study is to determine the marginal microleakage in Class II Occlusal-Proximal cavities sealed with different temporary filling materials. Sixty upper and lower premolars were divided into three groups: N=20 teeth for each group of temporary filling materials (C.I.V, IRM R, COLTOSOL). Prophylaxis was performed on each tooth using pumice stone and 0.12% chlorhexidine, followed by the preparation of Class II Occlusal-Proximal cavities. The cavities were disinfected with 0.2% chlorhexidine for one minute, air-dried, and sealed with Rapi Dry as a liner for 15 seconds, then immersed in 0.9% saline solution for 24 hours. The samples were dried on an absorbent surface, stained with 0.1% methylene blue for 48 hours at room temperature, washed, and dried on an absorbent surface for one hour. Sagittal cuts were made with abundant irrigation and constant air, and measurements were taken using a Wireless Digital Microscope with a zoom capacity of 50x-1000x and a resolution of 1920*1080. The images were adjusted to actual scale using Adobe Photoshop and Illustrator CS6. The results showed that C.I.V had lower marginal microleakage (G3 G0) and higher E.S.M.O.P. (12/20) than IRM R (G4, 9/20) and COLTOSOL (G4 G0, 8/20) in the teeth. Therefore, the temporary filling materials C.I.V and COLTOSOL exhibited less marginal microleakage in Class II Occlusal-Proximal cavities compared to IRM R.