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COMPARISON OF DIFFERENT METHODS OF EXCAVATION CONTROL FOR MINIMALLY INVASIVE CARIES TREATMENT
Table 5 . Changes in the colors of dentine in central point of group 2
HSB
H ( Hue ) 0
S ( Saturation ) %
B ( Brightness ) %
Level
N n
Mean ± Std . Dev
Mean ± Std . Dev
Mean ± Std . Dev
1-st level
88
38.00 ± 5.29
10.50 ± 4.38
75.00 ± 6.70
2-nd level
88
35.50 ± 9.63
9.13 ± 4.19
75.50 ± 7.37
3-rd level
8 8
37.63 ± 5.73
8.63 ± 5.73 75.88 ± 6.20
Control 8 39.00 ± 5.40 3.75 ± 3.11 77.38 ± 4.66
PS T-test
t 1 , k
= -0.42 [ p = 0.69 ] t 1 , 2 = 1.13 [ p = 0.29 ] t 2 , k
= -1.12 [ p = 0.30 ] t 1 , 3 = 0.15 [ p = 0.88 ] t 3 , k
= -1.02 [ p = 0.34 ]
t 2 , 3
= -0.67 [ p = 0.52 ]
t 1 , k
= 3.35 [ p = 0.01 ]
t 1 , 2
= 1.29 [ p = 0.24 ]
t 2 , k
= 2.34 [ p = 0.05 ]
t 1 , 3
= 0.87 [ p = 0.42 ]
t 3 , k
= 2.31 [ p = 0.05 ]
t 2 , 3
= 0.28 [ p = 0.89 ]
t 1 , k
= -1.19 [ p = 0.27 ]
t 1 , 2
= -0.61 [ p = 0.56 ]
t 2 , k
= -0.95 [ p = 0.38 ]
t 1 , 3
= -1.08 [ p = 0.32 ]
t 3 , k
= -1.01 [ p = 0.35 ]
t 2 , 3
= -0.60 [ p = 0.57 ]
Table 6 . Changes in colors of the dentine in central point of group 3 ( affected with Facelight control )
HSB Level
H ( Hue ) 0
S ( Saturation ) %
B ( Brightness ) %
N
Mean ± Std . Dev
Mean ± Std . Dev
Mean ± Std . Dev
1-st level
8
31.00 ± 9.34
35.25 ± 17.90
70.00 ± 7.54
2-nd level
8
34.25 ± 5.70
36.75 ± 22.95
71.00 ± 8.28
3-rd level
8
34.25 ± 6.78
27.13 ± 23.90
74.13 ± 5.64
Control
8
40.63 ± 1.77
8.00 ± 5.24
83.63 ± 1.92
PS T-test
t 1 , k
= - 3.00 ( p = 0.02 )
t 1 , 2
= -1.38 ( p = 0.21 )
t 2 , k
= - 3.37 ( p = 0.01 )
t 1 , 3
= -1.43 ( p = 0.20 )
t 3 , k
= - 2.60 ( p = 0.03 )
t 2 , 3
= -0.00 ( p = 1.00 )
t 1 , k
= 3.35 ( p = 0.01 )
t 1 , 2
= 1.29 ( p = 0.24 ) t 2 , k
= 2.34 ( p = 0.05 ) t 1 , 3 = 0.87 ( p = 0.42 ) t 3 , k
= 2.31 ( p = 0.05 ) t 2 , 3 = 0.28 ( p = 0.89 )
t 1 , k
= -6.40 ( p = 0.00 )
t 1 , 2
= -1.21 ( p = 0.26 ) t 2 , k
= -5.16 ( p = 0.00 ) t 1 , 3 = -1.96 ( p = 0.09 ) t 3 , k
= -4.86 ( p = 0.00 ) t 2 , 3 = -1.59 ( p = 0.16 )
4 . Discussion
Our hypothesis was based on the studies referred in the literature , 12 , 22 which presented evidences that changes in the color of carious dentine were comparable to the rate of carious process progression - partial or complete carious destruction , degree of demineralization and infection of the dentine during the carious process . There is a directly proportional relationship between the color of dentine and the extent of its destruction by caries ( demineralization ) on the one hand and the degree of infection on the other , on the basis of which a system of visual tactile control during excavation is created . 3 , 16 , 20 On the other hand , the degree of infection of the dentine is comparable to the degree of fluorescence with Facelight detector by which we controlled the mechanical excavation . The color of the dentine is characteristic for the level of demineralization of dental hard tissues . Our study showed that from the three parameters of color , the hue is the most stable indicator that can be used as a basis for comparative study , and saturation or brightness are complementary for color characteristic . The color of healthy dentine is close to yellow , where similar values with those of the controls are prerequisite for reliable comparative results in each group and between groups . The results indicate that the visual and tactile assessment of the excavation to healthy dentine is sufficiently precise and objective , when the purpose of the excavation is to reach a healthy dentine . This is not recommended in modern trends for minimally invasive excavation , when uncontrolled removal of dentine until reaching healthy dentine is rejected and “ over excavation ” is considered as harmful as insufficient excavation . There is evidence that reaching the area of healthy dentine results in a greater probability of microorganisms penetration in the depth of dentinal tubules , and further risk of dentine
15 , 21 infection . According to the results obtained in our study , we can conclude that dentine evaluated as affected by Facelight control has a degree of demineralization , which remains uniform in depth and differs significantly from healthy dentine . If we make analogy between color changes and the degree of dentine demineralization in depth , due to the advancing front of the carious process , we could

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