Enamel Thickness before and after Orthodontic Treatment Analysed in Optical Coherence Tomography
Table 1
(a) The enamel thickness (m) on the vestibular surface of the teeth after the completion of orthodontic treatment in the groups that used the fifth-generation system. (b) The enamel thickness (m) on the vestibular surface of the teeth after the completion of orthodontic treatment in the groups that used the seventh-generation system.
(a)
Variables
M
Me
Min.
Max.
Q1
Q3
SD
_Avg
40
472,75
453,60
259,16
743,87
376,28
564,13
187,85
117,25
_Min
40
128,18
130,00
0,00
360,00
80,00
185,00
105,00
78,36
_Max
40
1093,62
1040,00
450,00
2755,00
845,00
1255,00
410,00
411,96
Dif_Avg
40
96,53
76,50
−142,77
563,00
30,68
160,11
129,43
104,91
Dif_Min
40
55,71
55,00
−50,00
180,00
20,00
85,00
65,00
46,53
Dif_Max
40
432,69
180,00
−915,00
3060,00
15,00
700,00
685,00
665,75
The following symbols have been used in the table: , number of samples; M, arithmetic mean; Me, median; Min–max, range of variation; Q1–Q3, first quartile, third quartile; , interquartile range; SD, standard deviation; _Avg, average enamel thickness prior to orthodontic treatment; _Min, minimum enamel thickness prior to orthodontic treatment; _Max, maximum enamel thickness prior to orthodontic treatment; Dif_Avg, difference in average enamel thickness prior to orthodontic treatment and after its completion; Dif_Min, difference in minimum enamel thickness prior to orthodontic treatment and after its completion; Dif_Max, difference in maximum enamel thickness prior to orthodontic treatment and after its completion.
(b)
Variables
M
Me
Min.
Max.
Q1
Q3
SD
_Avg
40
469,03
439,72
172,14
844,79
367,49
570,38
202,95
130,18
_Min
40
132,26
140,00
0,00
315,00
80,00
185,00
95,00
69,89
_Max
40
1103,84
1030,00
460,00
2515,00
805,00
1330,00
400,00
432,52
Dif_Avg
40
90,93
65,15
−65,84
461,71
23,35
142,68
120,49
96,19
Dif_Min
40
50,15
40,00
−185,00
220,00
10,00
90,00
75,00
52,61
Dif_Max
40
402,10
265,00
−1415,00
3215,00
35,00
685,00
630,00
569,47
The following symbols have been used in the table: , number of samples; M, arithmetic mean; Me, median; Min–max, range of variation; Q1–Q3, first quartile, third quartile; , interquartile range; SD, standard deviation; _Avg, average enamel thickness after orthodontic treatment; _Min, minimum enamel thickness after orthodontic treatment; _Max, maximum enamel thickness after orthodontic treatment; Dif_Avg, difference in average enamel thickness prior to orthodontic treatment and after its completion; Dif_Min, difference in minimum enamel thickness prior to orthodontic treatment and after its completion; Dif_Max, difference in maximum enamel thickness prior to orthodontic treatment and after its completion.
