Table 2.

Summary of change from baseline gingival contour volume over time

Timepoint	N	Prophylaxis		No Prophylaxis
		Mean Change from baseline ± SD	P-value*	Mean Change from baseline ± SD	P-value*
Week 1	38	−0.27 ± 0.18	<0.0001	−0.09 ± 0.19	0.0032
Week 2	38	−0.20 ± 0.23	<0.0001	−0.08 ± 0.24	0.0307
Week 4	37	−0.10 ± 0.30	0.0304	−0.07 ± 0.27	0.1324
Week 6	37	−0.13 ± 0.29	0.0117	−0.07 ± 0.29	0.1248
Week 12	37	−0.04 ± 0.26	0.3588	−0.03 ± 0.28	0.4667

^*P-value from adjusted mean.