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COMPARISON OF DIFFERENT METHODS OF EXCAVATION CONTROL FOR MINIMALLY INVASIVE CARIES TREATMENT

Table 3 . Color characteristics of control point in different groups

HSB Group

1 group affected with the visual and tactile method 40.63 ± 1.768.00 ± 5.242 group healthy with the visual and tactile method 83,63 ± 1,92 4 group healthy with the fluorescent method 3 group affected with the fluorescent method

PS T-test

8 40.25 ± 4.20 8.25 ± 4.74 83,88 ± 5,89

8 39.00 ± 5.39 3.75 ± 3.11 77,38 ± 4,66

8 40.88 ± 4.22 6.63 ± 2.26 77,5 ± 4,11

t 1 , 2

= 0.52 ( p = 0.61 ) t 2 , 3 = - 0.81 ( p = 0.43 ) t 1 , 3

= - 0.20 ( p = 0.82 ) t 2 , 4 = - 0.77 ( p = 0.45 ) t 1 , 4

= - 0.30 ( p = 0.77 ) t 3 , 4 = - 0.15 ( p = 0.88 ) t 1 , 2

= 2.25 ( p = 0.04 ) t 2 , 3 = -1.97 ( p = 0.07 ) t 1 , 3

= 0.10 ( p = 0.90 ) t 2 , 4 = -2.12 ( p = 0.05 ) t 1 , 4

= 0.87 ( p = 0.40 ) t 3 , 4 = 0.68 ( p = 0.57 )

Table 4 . Changes in the color of dentine in Group 1

HSB Level

H ( Hue ) 0 S ( Saturation ) % B ( Brightness ) %

N Mean ± Std . Dev Mean ± Std . Dev Mean ± Std . Dev

42.13 % to 18.50 % and the brightness increased from 68-63 % to 75.63 % ( p < 0.05 ). In comparison to healthy dentine the values of saturation and brightness did not reach the values of control ( p < 0.05 ). Table 5 presents the changes in the color of dentine in Group 2 , after mechanical excavation to healthy dentine , controlled in depth with visual and tactile method ( Fig . 4 ). The colors of all studied depths are as close as possible to the control ( healthy dentine ) ( p > 0.05 ). The same relationship is also seen in terms of the saturation and brightness of the obtained average values obtained of the test points in the three levels of the depth ( p > 0.05 ). When controlling the excavation with Facelight ( Fig . 5 ), the color of dentine is estimated as affected when a light pink fluorescence is noticed , localized only in the bottom of the cavity . The affected dentine is reliably darker than the control ( healthy dentine ) ( p < 0.05 ), saturation stands out from control in the entire depth of examined dentine , and brightness authentically distinguishes authentically from control only on the surface of the dentine ( Table 6 ). It is notable that in depth , the color of the points studied remains constant and reliable ; differences in depth are not found . We introduce the “ non-infected ” dentine term because the presence of fluorescence at the bottom of the cavity is due to microbial bio-products in dentinal tubules during the carious process , and the absence of fluorescence in the dentine is assumed as dentine without microorganisms , which we refer to as “ non-infected dentine ” ( Fig . 6 ). It differs in color from the healthy dentine registered by the visual and tactile control , which will be shown in the following results ( Table 7 ). When excavating to “ non-infected dentine ” ( excavation stops when the fluorescence disappears , which is considered to be a lack of micro-organisms ), the color of the surface is fairly darker than the control ( healthy dentine ) and lighter than the affected ( Table 7 ). Differences in hue and saturation as compared to control are supported by statistical confidence ( p < 0.05 ). This is different from the trend observed in group 2 ( with excavation also to healthy dentine but with visual and tactile control ), where the values are very close to the control ( p > 0.05 ). The second feature that we observe in this group is that the color remains constant in depth , but becomes less intense and with higher brightness ( p < 0.05 ).