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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