Table 3. Frequency and percentage of each gingival index score for each tooth surface between the Conventional and Ortho-FlexTech retainers, followed by the P value for each surface.

Gingival Index
	Conventional n (%)	Ortho-FlexTech n (%)	P-value
Mesial
0	5 (33.3)	2 (13.3)	0.02
1	9 (60.0)	8 (53.3)
2	1 (6.7)	5 (33.3)
3	0 (0.0)	0 (0.0)
Distal
0	5 (33.3)	2 (13.3)	0.01
1	10 (66.7)	8 (53.3)
2	0 (0.0)	5 (33.3)
3	0 (0.0)	0 (0.0)
Lingual
0	4 (26.7)	0 (0.0)	0.008
1	9 (60.0)	6 (40.0)
2	2 (13.3)	9 (60.0)
3	0 (0.0)	0 (00.0)