Implant decontamination with phosphoric acid during surgical peri-implantitis treatment: a RCT

International Journal of Implant Dentistry

Table 2 Log-transformed mean bacterial anaerobic counts (SD) of culture-positive implants for the control and test group before (T_pre) and after (T_post) debridement and decontamination of the implant surface (intra-operative microbrush samples)

N = 40^a	Total anaerobic bacterial load Log-transformed mean (SD)
	T_pre	T_post	Difference	β (95% CI)^b	p value
Control	5.57 (0.93) [17]	2.25 (2.98)^c [7]^d	2.68 (3.25)	−1.39 (−3.09–0.32)	0.108
Test	5.35 (0.98) [23]	0.81 (2.25)^c [3]^d	4.19 (3.31)

SD standard deviation, [n] number of culture-positive implants
^aImplants with baseline values of 0 excluded from analysis
^bLinear regression analysis, adjusted for baseline values
^cSignificant difference from baseline
^dSignificant difference in number of culture-positive implants after decontamination between test and control group (p = 0.042)