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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