Alomari, Nusair, Ali D-35578 Wetzlar, Germany) at magnification of x10. The degree of dye penetration was measured quantitatively with an image analysis program (Leica IM 500, Leica Microsystems, Wetzlar GmbH, Ernst-Leitz-Strasse, D-35578 Wetzlar, Germany) with an accuracy of 0,001 mm. Using the same pictures, qualitative dye penetration scores were taken separately according to the following crite- ria: 8,22-27 0 = no dye penetration 1 = penetration of the dye to one-half of the cervical floor 2 = penetration of the dye along the entire length of the cervical floor 3 = penetration of the dye up to one-half of the length of the axial wall (in groups III and IV) or up to one-half of the length of the occlusal wall (in groups I and II) 4 = penetration of the dye greater than one-half of the axial wall (in groups III and IV) or greater than one-half of the length of the occlusal wall (in groups I and II) Both the quantitative and qualitative measure- ments were taken by two examiners indepen- dently and at two different occasions. Prior to the investigation, calibration of both examiners was undertaken by reading 8 pilot samples which were not included in the study. Kappa value of 0.9 was Figure 1a. Photograph of box-shaped class V cavity. Figure 1b. Photograph of cross section of restored box-shaped class V cavity. Figure 2a. Photograph of V-shaped class V cavity. Figure 2b. Photograph of cross section of restored V-shaped class V cavity. October 2011 - Vol.5 403 European Journal of Dentistry