Priming the tooth surface with chlorhexidine and antibacterial activity of resin cement

Table 3 Statistical data on the distribution of bacteria isolated in control and test groups for gram stain, atmosphere of growth, morphological properties and pathogenicity at baseline, 5 and 13 wk

Type of bacteria	Control	Test	χ2	P value
Baseline
Aerobic/facultative	55	71	4.913	0.0839
Anaerobic	45	29
Gram-positive	69	71	2.391	0.00521
Gram-negative	31	29
Cocci	72	58	2.598	0.00181
Rods	28	42
5 wk
Aerobic/facultative	60	62	0.721	0.02511
Anaerobic	40	38
Gram-positive	75	75	0.593	0.01341
Gram-negative	25	25
Cocci	65	51	0.398	0.00311
Rods	35	45
13 wk
Aerobic/facultative	43	85	5.821	0.00511
Anaerobic	57	15
Gram-positive	39	80	6.321	0.00321
Gram-negative	61	20
Cocci	38	55	7.229	0.00051
Rods	72	35

¹Association is significant by χ² analysis (P < 0.05).