Table 2. Comparison of the changes in probing depth between treatment and three and six months of follow-up.

Defect	Site	n	Baseline to three months		Three months to six months		Baseline to six months
			Mean±SD	P-value	Mean±SD	P-value	Mean±SD	P-value
Horizontal	Interdental PDC	68	0.67±0.3	<0.001	0.04±0.24	0.285	0.72±0.36	<0.001
	Total PDC	204	1.07±0.83	<0.001	0.16±0.54	0.075	1.24±0.95	<0.001
Vertical	Interdental PDC	68	0.41±0.42	<0.001	0.07±0.3	0.186	0.48±0.42	<0.001
	Total PDC	204	0.71±0.69	<0.001	0.02±0.64	0.832	0.72±0.75	<0.001
Horizontal	Interdental PDCD	68	1.07±0.83	<0.006	0.16±0.59	0.164	1.24±0.95	<0.001
	Total PDCD	204	0.67±0.79	<0.001	0.04±0.56	0.659	0.72±0.90	<0.006
Vertical	Interdental PDCD	68	0.71±0.69	<0.006	0.02±0.64	0.164	0.72±0.75	<0.001
	Total PDCD	204	0.41±0.82	<0.001	0.07±0.57	0.659	0.48±0.84	<0.006

SD, standard deviation; PDC, probing depth change; PDCD, difference in probing depth change.