23 This meta-analysis showed that the control group exhibited a significant reduction in the plaque score at 6 months ( P < .001) and a borderline significant decrease in overall changes compared with the MI group ( P = .05).
23 Only 2 studies examined the effects of MI on the GI, revealing a marginally significant decrease in the index for the MI group compared to the control group (SMD = −0.29, P = .07). 23 , 38 These findings suggest that MI promotes the recovery of gingival tissues, although this requires additional experimental confirmation.