COMPARISON OF DIFFERENT METHODS OF EXCAVATION CONTROL FOR MINIMALLY INVASIVE CARIES TREATMENT
Figure 3 . Mechanical excavation to an affected dentin evaluated with visual and tactile control method
Figure 4 . Mechanical excavation to a healthy dentin with visual and tactile control
Figure 5 . Mechanical excavation to affected dentin with Facelight control
analyse the change of the basic parameters and comparison of the samples .
2.3 . Statistical methods The data were statistically analysed with SPSS-19 software ( SPSS Inc , Chicago , IL , USA ).
3 . Results
3.1 . Color characteristics ( HSB ) of healthy dentine ( control point ) in the four studied groups The following table 3 presents the color characteristics of healthy dentine , which serves as control when comparing the color characteristics of the three investigated points in depth of excavated caries lesion . It is notable from the table that the color characteristics of healthy dentine in the four studied groups showed similar values for parameter H ( hue ) without any statistically significant differences when comparing between groups [ p > 0,05 ]. It should be noted that the hue substantially reflects the primary color . Values between 39.00 and 41.00 are perceived by the eye close to the value of 60 ( yellow color ), which is considered as a characteristic of healthy dentine by Bjørndal ’ s visual tactile scale . The values for Saturation and Brightness complement the basic color . Saturation of the 4 surveyed groups range between 3 - 10 %, which is an indicator of low intensity , typical of the
Figure 6 . Mechanical excavation to “ non-infected ” dentin with Facelight control
lighter colors , such as yellow color and nuances of yellow , which characterizes the healthy dentine we studied . Brightness , which is measured as a percentage from black ( 0 %) to white ( 100 %), in our studied samples was over 77 %, which is an indicator of approaching white . Differences between groups in terms of saturation and brightness show greater variation , which is understandable due to the fact that their values are influenced mainly by the individual terms of object capturing .
3.2 . Color characteristics ( HSB ) of dentine in the bottom of excavated cavity in depth In the following tables characteristics of color in the center of dentine in excavated cavities ( in solid or stagy dentine ) in depth - 3 levels on a distance of 80 pixels ( 0.4 mm ) or a common depth - 0.8 mm are given . Table 4 presents the changes in the color of dentine in Group 1 , after mechanical excavation to affected dentine , controlled in depth by the visual and tactile method ( Fig . 3 ). Table 4 shows that the surface of the remaining affected dentine at the bottom of the cavity has a color completely different when compared with the control group [ shades of yellow ] towards the brown shades that are darker at the surface and become brighter in depth without reaching the color of healthy dentine in depth of around 1 cm [ control ]. Saturation in various test points decreases from
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