DOI: 10.11607/prd.2094, PubMed ID (PMID): 25411737Pages 816-823, Language: EnglishSchlee, Markus / Lex, Maria / Rathe, Florian / Kasaj, Adrian / Sader, RobertThis case series evaluated the use of a collagen matrix with a coronally advanced flap procedure for the treatment of multiple recession defects. Fifteen patients with a total of 80 recession defects were included. Root coverage was 85% ± 13% at 6 months and 81% ± 22% at 12 months. Complete root coverage was achieved in 60% of the sites after 6 months and in 56% after 12 months. The percentage of sites with thick gingival morphotype increased significantly. The results indicated that the collagen matrix may be a useful alternative to the connective tissue graft in the treatment of multiple recession defects.