Fig. 5From: Socket seal surgery techniques in the esthetic zone: a systematic review with meta-analysis and trial sequential analysis of randomized clinical trialsMeta-analytic illustration shows a trend for slight dimensional changes on the ridge width (RW) in the collagen matrix group at − 1 and − 3 mm cutoffs and a slight RW gain of 0.15 mm favoring free gingival graft sealing materialBack to article page