Table 2.

Results of the bioluminescence measurements (pixel number in the bioluminescence areas) in each bracket group

Ergebnisse der Biolumineszenzmessungen (Pixelzahl in den Biolumineszenzfeldern) in jeder Bracketgruppe

	Min	Max	Mean	Median	SD	p-value
Bracket group A: stainless steel
Pixels at baseline	0.60	4.12	1.22	0.60	0.85	<0.0001
Pixels after demineralization	0.69	25.55	7.01	6.11	5.10
Pixels × area at baseline	448.80	12,877.98	3004.39	2275.24	2961.63	<0.0001
Pixels × area after demineralization	562.38	62,585.25	16,925.43	15,260.13	15,134.55
Bracket group B: titanium
Pixels at baseline	0.64	3.67	1.10	0.82	0.71	<0.0001
Pixels after demineralization	0.97	15.95	7.21	6.01	3.42
Pixels × area at baseline	564.82	22,992.09	4349.77	2581.77	5198.45	<0.0001
Pixels × area after demineralization	1615.41	93,788.16	25,384.89	18,925.69	22,029.19
Bracket group C: ceramic
Pixels at baseline	0.65	7.22	1.55	0.95	1.33	<0.0001
Pixels after demineralization	2.17	22.97	7.52	6.75	4.33
Pixels × area at baseline	524.66	33,497.64	4634.84	2632.02	6326.58	<0.0001
Pixels × area after demineralization	1143.12	97,513.88	22,384.95	16,041.29	21,363.11

SD standard deviation, min minimum, max maximum