Table 4.

Changes in microbiological values over time for the SRP + OT and SRP-alone groups.

		Baseline		1st month			3rd Month
		Mean ± SD	Between Groups P valuesa	Mean ± SD	Within Groups	Between Groups P valuesa	Mean ± SD	Within Groups	Between Groups P valuesa
P.gingivalis	SRP + OT (n = 18)	2.61E ± 0.12	N.S	2.12E ± 0.067	N.S	N.S	1.98E ± 0.18	N.S	N.S
	SRP-alone (n = 18)	3.08E ± 0.12		2.05E ± 0.014	B vs 1st M 0.006*		2.03E ± 0.17	N.S
A. actinomycetemcomitans	SRP + OT (n = 18)	0.31E ± 0.01	N.S	0.15E ± 0.05	N.S	N.S	0.08E ± 0.02	N.S	N.S
	SRP-alone (n = 18)	0.40E ± 0.01		0.27E ± 0.06	N.S		0.21E ± 0.07	N.S
P. intermedia	SRP + OT (n = 18)	2.31E ± 0.15	N.S	1.57E ± 0.15	N.S	N.S	1.12E ± 0.15	B vs 3rd M 0.049*	N.S
	SRP-alone (n = 18)	2.74E ± 0.11		1.73E ± 0.16	N.S		1.37E ± 0.15	B vs 3rd M 0.013*
T. forsythensis	SRP + OT (n = 18)	1.98E ± 0.13	N.S	1.61E ± 0.12	N.S	N.S	0.84E ± 0.09	N.S	N.S
	SRP-alone (n = 18)	2.65E ± 0.46		1.58E ± 0.12	B vs 1st M 0.028*		1.48E ± 0.09	B vs 3rd M 0.004*
Total bacterial counts	SRP + OT (n = 18)	4.44E ± 0.35	N.S	4.10E ± 0.63	N.S	N.S	4.15E ± 0.27	B vs 3rd M 0.05*	N.S
	SRP-alone (n = 18)	4.56E ± 0.29		3.98E ± 0.36	B vs 3st M 0.003*		4.26E ± 0.35	N.S

*P < 0.05, Wilcoxon Sign Rank test.

SRP: Scaling and root planning, OT: Ozone therapy, A. actinomycetemcomitans: Aggregatibacter actinomycetemcomitans, P. gingivalis: Porphyromonas gingivalis, P. intermedia: Prevotella intermedia, T. forsythensis:Tannerella forsythensis.

SD: Standard deviation, N.S: Non significant, B: Baseline, M: Month.

^aComparison of microbiological values between SRP + OT and SRP-alone groups by Wilcoxon Sign Rank test.